./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe008_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe008_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 16:01:12,651 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:01:12,712 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:01:12,716 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:01:12,716 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:01:12,738 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:01:12,739 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:01:12,739 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:01:12,740 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:01:12,742 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:01:12,743 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:01:12,743 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:01:12,743 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:01:12,744 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:01:12,744 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:01:12,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:01:12,745 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:01:12,745 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:01:12,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:01:12,746 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:01:12,746 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:01:12,746 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:01:12,747 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:01:12,747 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:01:12,747 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:01:12,747 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:01:12,747 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:01:12,747 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:01:12,748 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:01:12,748 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:01:12,749 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:01:12,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:01:12,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:01:12,749 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:01:12,750 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:01:12,750 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:01:12,750 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:01:12,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:01:12,750 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:01:12,750 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:01:12,751 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:01:12,751 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:01:12,751 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:01:12,751 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:01:12,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:01:12,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:01:12,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:01:12,934 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:01:12,935 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:01:12,936 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe008_tso.yml/witness.yml [2024-06-04 16:01:13,079 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:01:13,080 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:01:13,080 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i [2024-06-04 16:01:13,996 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:01:14,228 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:01:14,231 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_tso.i [2024-06-04 16:01:14,249 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac26ba037/4e458b772d3e44b59e9c0daa02c15463/FLAG06a9103a0 [2024-06-04 16:01:14,266 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac26ba037/4e458b772d3e44b59e9c0daa02c15463 [2024-06-04 16:01:14,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:01:14,267 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:01:14,269 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:01:14,269 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:01:14,273 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:01:14,273 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:01:13" (1/2) ... [2024-06-04 16:01:14,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@440322fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:14, skipping insertion in model container [2024-06-04 16:01:14,274 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:01:13" (1/2) ... [2024-06-04 16:01:14,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27b52416 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:14, skipping insertion in model container [2024-06-04 16:01:14,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:01:14" (2/2) ... [2024-06-04 16:01:14,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@440322fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14, skipping insertion in model container [2024-06-04 16:01:14,276 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:01:14" (2/2) ... [2024-06-04 16:01:14,276 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:01:14,313 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:01:14,314 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! 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 )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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 )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (3LL - (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (3LL - (long long )x) - (long long )z >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-04 16:01:14,314 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$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_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$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 )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$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_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (3LL - (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (3LL - (long long )x) - (long long )z >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-04 16:01:14,314 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! 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 )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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 )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (3LL - (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (3LL - (long long )x) - (long long )z >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-04 16:01:14,315 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:01:14,315 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-04 16:01:14,358 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:01:14,622 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:01:14,630 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:01:14,749 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:01:14,785 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:01:14,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14 WrapperNode [2024-06-04 16:01:14,786 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:01:14,787 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:01:14,787 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:01:14,787 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:01:14,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (1/1) ... [2024-06-04 16:01:14,821 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (1/1) ... [2024-06-04 16:01:14,852 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-04 16:01:14,852 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:01:14,852 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:01:14,853 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:01:14,854 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:01:14,863 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (1/1) ... [2024-06-04 16:01:14,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (1/1) ... [2024-06-04 16:01:14,867 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (1/1) ... [2024-06-04 16:01:14,895 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]. [2024-06-04 16:01:14,895 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (1/1) ... [2024-06-04 16:01:14,895 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (1/1) ... [2024-06-04 16:01:14,906 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (1/1) ... [2024-06-04 16:01:14,910 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (1/1) ... [2024-06-04 16:01:14,914 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (1/1) ... [2024-06-04 16:01:14,915 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (1/1) ... [2024-06-04 16:01:14,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:01:14,922 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:01:14,922 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:01:14,922 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:01:14,923 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (1/1) ... [2024-06-04 16:01:14,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:01:14,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:01:14,944 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) [2024-06-04 16:01:14,976 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 [2024-06-04 16:01:14,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:01:14,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:01:14,985 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:01:14,985 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:01:14,986 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:01:14,986 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:01:14,986 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:01:14,986 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:01:14,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:01:14,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:01:14,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:01:14,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:01:14,988 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:01:15,112 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:01:15,114 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:01:15,404 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:01:15,404 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:01:15,470 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:01:15,471 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:01:15,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:01:15 BoogieIcfgContainer [2024-06-04 16:01:15,471 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:01:15,473 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:01:15,473 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:01:15,475 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:01:15,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:01:13" (1/4) ... [2024-06-04 16:01:15,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28757072 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:01:15, skipping insertion in model container [2024-06-04 16:01:15,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:01:14" (2/4) ... [2024-06-04 16:01:15,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28757072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:01:15, skipping insertion in model container [2024-06-04 16:01:15,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:14" (3/4) ... [2024-06-04 16:01:15,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28757072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:01:15, skipping insertion in model container [2024-06-04 16:01:15,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:01:15" (4/4) ... [2024-06-04 16:01:15,478 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_tso.i [2024-06-04 16:01:15,490 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:01:15,490 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:01:15,491 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:01:15,529 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:01:15,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:01:15,575 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-04 16:01:15,576 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:01:15,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 16:01:15,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:01:15,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-04 16:01:15,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:01:15,595 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;@60800905, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:01:15,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:01:15,599 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:01:15,599 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:01:15,599 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:01:15,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:15,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:01:15,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:15,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1782945868, now seen corresponding path program 1 times [2024-06-04 16:01:15,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:15,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364009498] [2024-06-04 16:01:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:15,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:16,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:16,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364009498] [2024-06-04 16:01:16,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364009498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:16,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:16,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:01:16,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372124448] [2024-06-04 16:01:16,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:16,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:01:16,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:16,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:01:16,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:01:16,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:01:16,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:16,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:16,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:01:16,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:16,578 INFO L124 PetriNetUnfolderBase]: 607/1019 cut-off events. [2024-06-04 16:01:16,579 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-04 16:01:16,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2023 conditions, 1019 events. 607/1019 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5018 event pairs, 393 based on Foata normal form. 1/967 useless extension candidates. Maximal degree in co-relation 2008. Up to 937 conditions per place. [2024-06-04 16:01:16,589 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-04 16:01:16,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-04 16:01:16,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:01:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:01:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-04 16:01:16,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-04 16:01:16,601 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 82 transitions. [2024-06-04 16:01:16,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-04 16:01:16,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:16,606 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-04 16:01:16,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-04 16:01:16,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 16:01:16,611 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-04 16:01:16,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:16,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:16,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:16,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:01:16,611 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:16,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:16,612 INFO L85 PathProgramCache]: Analyzing trace with hash 280983315, now seen corresponding path program 1 times [2024-06-04 16:01:16,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:16,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762328562] [2024-06-04 16:01:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:16,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:16,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:16,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762328562] [2024-06-04 16:01:16,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762328562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:16,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:16,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:01:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69403232] [2024-06-04 16:01:16,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:16,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:01:16,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:01:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:01:16,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:01:16,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:16,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:16,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:01:16,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:17,129 INFO L124 PetriNetUnfolderBase]: 608/1024 cut-off events. [2024-06-04 16:01:17,130 INFO L125 PetriNetUnfolderBase]: For 186/192 co-relation queries the response was YES. [2024-06-04 16:01:17,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2345 conditions, 1024 events. 608/1024 cut-off events. For 186/192 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4971 event pairs, 321 based on Foata normal form. 8/1028 useless extension candidates. Maximal degree in co-relation 2330. Up to 911 conditions per place. [2024-06-04 16:01:17,136 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 39 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2024-06-04 16:01:17,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 264 flow [2024-06-04 16:01:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-04 16:01:17,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676829268292683 [2024-06-04 16:01:17,140 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 111 transitions. [2024-06-04 16:01:17,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 264 flow [2024-06-04 16:01:17,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:17,143 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-04 16:01:17,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-04 16:01:17,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-04 16:01:17,144 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-04 16:01:17,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:17,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:17,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:17,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:01:17,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:17,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:17,149 INFO L85 PathProgramCache]: Analyzing trace with hash 120548589, now seen corresponding path program 1 times [2024-06-04 16:01:17,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:17,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47557978] [2024-06-04 16:01:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:17,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:17,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:17,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47557978] [2024-06-04 16:01:17,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47557978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:17,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:17,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:17,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084987289] [2024-06-04 16:01:17,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:17,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:17,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:17,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:17,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:17,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:17,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:17,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:17,637 INFO L124 PetriNetUnfolderBase]: 775/1274 cut-off events. [2024-06-04 16:01:17,638 INFO L125 PetriNetUnfolderBase]: For 857/865 co-relation queries the response was YES. [2024-06-04 16:01:17,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3478 conditions, 1274 events. 775/1274 cut-off events. For 857/865 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6190 event pairs, 292 based on Foata normal form. 10/1280 useless extension candidates. Maximal degree in co-relation 3460. Up to 1131 conditions per place. [2024-06-04 16:01:17,647 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2024-06-04 16:01:17,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 452 flow [2024-06-04 16:01:17,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-04 16:01:17,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6536585365853659 [2024-06-04 16:01:17,651 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 5 states and 134 transitions. [2024-06-04 16:01:17,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 452 flow [2024-06-04 16:01:17,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 81 transitions, 446 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:17,657 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 305 flow [2024-06-04 16:01:17,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=305, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2024-06-04 16:01:17,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-04 16:01:17,658 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 305 flow [2024-06-04 16:01:17,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:17,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:17,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:17,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:01:17,659 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:17,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1838225564, now seen corresponding path program 1 times [2024-06-04 16:01:17,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:17,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276686575] [2024-06-04 16:01:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:17,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:17,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:17,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276686575] [2024-06-04 16:01:17,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276686575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:17,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:17,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:17,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168111396] [2024-06-04 16:01:17,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:17,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:17,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:17,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:17,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:18,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:18,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 305 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:18,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:18,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:18,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:18,221 INFO L124 PetriNetUnfolderBase]: 804/1323 cut-off events. [2024-06-04 16:01:18,222 INFO L125 PetriNetUnfolderBase]: For 1640/1653 co-relation queries the response was YES. [2024-06-04 16:01:18,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4135 conditions, 1323 events. 804/1323 cut-off events. For 1640/1653 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6475 event pairs, 198 based on Foata normal form. 23/1342 useless extension candidates. Maximal degree in co-relation 4112. Up to 1104 conditions per place. [2024-06-04 16:01:18,229 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 66 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-04 16:01:18,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 570 flow [2024-06-04 16:01:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-04 16:01:18,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-04 16:01:18,231 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 305 flow. Second operand 6 states and 157 transitions. [2024-06-04 16:01:18,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 570 flow [2024-06-04 16:01:18,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 90 transitions, 564 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:18,235 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 349 flow [2024-06-04 16:01:18,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=349, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-06-04 16:01:18,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-04 16:01:18,236 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 349 flow [2024-06-04 16:01:18,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:18,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:18,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:18,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:01:18,237 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:18,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:18,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1910852492, now seen corresponding path program 1 times [2024-06-04 16:01:18,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:18,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604520932] [2024-06-04 16:01:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:18,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:18,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:18,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604520932] [2024-06-04 16:01:18,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604520932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:18,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:18,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:18,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579128394] [2024-06-04 16:01:18,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:18,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:18,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:18,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:18,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:18,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:18,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 349 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:18,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:18,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:18,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:18,742 INFO L124 PetriNetUnfolderBase]: 949/1560 cut-off events. [2024-06-04 16:01:18,743 INFO L125 PetriNetUnfolderBase]: For 2613/2613 co-relation queries the response was YES. [2024-06-04 16:01:18,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5140 conditions, 1560 events. 949/1560 cut-off events. For 2613/2613 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7760 event pairs, 364 based on Foata normal form. 2/1560 useless extension candidates. Maximal degree in co-relation 5114. Up to 1424 conditions per place. [2024-06-04 16:01:18,751 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 63 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-06-04 16:01:18,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 77 transitions, 569 flow [2024-06-04 16:01:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-04 16:01:18,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:01:18,753 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 349 flow. Second operand 4 states and 97 transitions. [2024-06-04 16:01:18,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 77 transitions, 569 flow [2024-06-04 16:01:18,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 529 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:18,761 INFO L231 Difference]: Finished difference. Result has 59 places, 65 transitions, 395 flow [2024-06-04 16:01:18,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=395, PETRI_PLACES=59, PETRI_TRANSITIONS=65} [2024-06-04 16:01:18,763 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-04 16:01:18,763 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 65 transitions, 395 flow [2024-06-04 16:01:18,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:18,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:18,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:18,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:01:18,765 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:18,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:18,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2094214223, now seen corresponding path program 1 times [2024-06-04 16:01:18,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:18,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361943393] [2024-06-04 16:01:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:18,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:19,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:19,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361943393] [2024-06-04 16:01:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361943393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:19,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:19,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:19,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675965749] [2024-06-04 16:01:19,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:19,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:19,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:19,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:19,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:19,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 65 transitions, 395 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:19,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:19,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:19,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:19,387 INFO L124 PetriNetUnfolderBase]: 942/1540 cut-off events. [2024-06-04 16:01:19,388 INFO L125 PetriNetUnfolderBase]: For 3650/3686 co-relation queries the response was YES. [2024-06-04 16:01:19,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5522 conditions, 1540 events. 942/1540 cut-off events. For 3650/3686 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7757 event pairs, 266 based on Foata normal form. 13/1539 useless extension candidates. Maximal degree in co-relation 5494. Up to 1275 conditions per place. [2024-06-04 16:01:19,398 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 36 changer transitions 0/104 dead transitions. [2024-06-04 16:01:19,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 104 transitions, 753 flow [2024-06-04 16:01:19,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:19,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-04 16:01:19,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-04 16:01:19,400 INFO L175 Difference]: Start difference. First operand has 59 places, 65 transitions, 395 flow. Second operand 6 states and 159 transitions. [2024-06-04 16:01:19,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 104 transitions, 753 flow [2024-06-04 16:01:19,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 104 transitions, 749 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:19,405 INFO L231 Difference]: Finished difference. Result has 65 places, 76 transitions, 548 flow [2024-06-04 16:01:19,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=548, PETRI_PLACES=65, PETRI_TRANSITIONS=76} [2024-06-04 16:01:19,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-04 16:01:19,406 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 76 transitions, 548 flow [2024-06-04 16:01:19,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:19,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:19,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:19,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:01:19,406 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:19,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash -326913519, now seen corresponding path program 2 times [2024-06-04 16:01:19,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:19,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690851117] [2024-06-04 16:01:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:19,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:19,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:19,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690851117] [2024-06-04 16:01:19,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690851117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:19,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:19,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:19,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880340377] [2024-06-04 16:01:19,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:19,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:19,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:19,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:19,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:19,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:19,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 548 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:19,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:19,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:19,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:20,000 INFO L124 PetriNetUnfolderBase]: 952/1566 cut-off events. [2024-06-04 16:01:20,000 INFO L125 PetriNetUnfolderBase]: For 5208/5248 co-relation queries the response was YES. [2024-06-04 16:01:20,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6201 conditions, 1566 events. 952/1566 cut-off events. For 5208/5248 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7901 event pairs, 285 based on Foata normal form. 25/1578 useless extension candidates. Maximal degree in co-relation 6170. Up to 1348 conditions per place. [2024-06-04 16:01:20,026 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 70 selfloop transitions, 29 changer transitions 0/108 dead transitions. [2024-06-04 16:01:20,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 108 transitions, 890 flow [2024-06-04 16:01:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:20,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 16:01:20,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-04 16:01:20,028 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 548 flow. Second operand 6 states and 152 transitions. [2024-06-04 16:01:20,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 108 transitions, 890 flow [2024-06-04 16:01:20,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 108 transitions, 847 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:20,037 INFO L231 Difference]: Finished difference. Result has 70 places, 84 transitions, 649 flow [2024-06-04 16:01:20,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=649, PETRI_PLACES=70, PETRI_TRANSITIONS=84} [2024-06-04 16:01:20,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-04 16:01:20,038 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 84 transitions, 649 flow [2024-06-04 16:01:20,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:20,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:20,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:20,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:01:20,039 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:20,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:20,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2094094067, now seen corresponding path program 1 times [2024-06-04 16:01:20,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:20,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25865567] [2024-06-04 16:01:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:20,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:20,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:20,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25865567] [2024-06-04 16:01:20,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25865567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:20,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:20,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:20,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422974294] [2024-06-04 16:01:20,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:20,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:20,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:20,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:20,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:20,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:20,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 84 transitions, 649 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:20,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:20,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:20,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:20,559 INFO L124 PetriNetUnfolderBase]: 1037/1706 cut-off events. [2024-06-04 16:01:20,559 INFO L125 PetriNetUnfolderBase]: For 6138/6138 co-relation queries the response was YES. [2024-06-04 16:01:20,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6771 conditions, 1706 events. 1037/1706 cut-off events. For 6138/6138 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8645 event pairs, 335 based on Foata normal form. 2/1704 useless extension candidates. Maximal degree in co-relation 6737. Up to 1492 conditions per place. [2024-06-04 16:01:20,571 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 97 selfloop transitions, 19 changer transitions 0/122 dead transitions. [2024-06-04 16:01:20,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 122 transitions, 1058 flow [2024-06-04 16:01:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:01:20,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-04 16:01:20,572 INFO L175 Difference]: Start difference. First operand has 70 places, 84 transitions, 649 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:01:20,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 122 transitions, 1058 flow [2024-06-04 16:01:20,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 122 transitions, 976 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:20,579 INFO L231 Difference]: Finished difference. Result has 75 places, 96 transitions, 720 flow [2024-06-04 16:01:20,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=720, PETRI_PLACES=75, PETRI_TRANSITIONS=96} [2024-06-04 16:01:20,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-04 16:01:20,579 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 96 transitions, 720 flow [2024-06-04 16:01:20,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:20,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:20,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:20,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:01:20,580 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:20,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:20,581 INFO L85 PathProgramCache]: Analyzing trace with hash -312772087, now seen corresponding path program 2 times [2024-06-04 16:01:20,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:20,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134132516] [2024-06-04 16:01:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:20,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:20,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:20,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134132516] [2024-06-04 16:01:20,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134132516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:20,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:20,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:20,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578443386] [2024-06-04 16:01:20,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:20,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:20,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:20,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:20,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:20,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:20,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 96 transitions, 720 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:20,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:20,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:20,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:21,071 INFO L124 PetriNetUnfolderBase]: 1048/1732 cut-off events. [2024-06-04 16:01:21,071 INFO L125 PetriNetUnfolderBase]: For 7458/7468 co-relation queries the response was YES. [2024-06-04 16:01:21,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7180 conditions, 1732 events. 1048/1732 cut-off events. For 7458/7468 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8845 event pairs, 346 based on Foata normal form. 10/1737 useless extension candidates. Maximal degree in co-relation 7143. Up to 1504 conditions per place. [2024-06-04 16:01:21,093 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 91 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-04 16:01:21,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 119 transitions, 1059 flow [2024-06-04 16:01:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-04 16:01:21,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-04 16:01:21,095 INFO L175 Difference]: Start difference. First operand has 75 places, 96 transitions, 720 flow. Second operand 5 states and 121 transitions. [2024-06-04 16:01:21,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 119 transitions, 1059 flow [2024-06-04 16:01:21,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 119 transitions, 1029 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:21,106 INFO L231 Difference]: Finished difference. Result has 79 places, 101 transitions, 788 flow [2024-06-04 16:01:21,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=788, PETRI_PLACES=79, PETRI_TRANSITIONS=101} [2024-06-04 16:01:21,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-04 16:01:21,107 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 101 transitions, 788 flow [2024-06-04 16:01:21,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:21,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:21,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:21,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:01:21,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:21,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:21,108 INFO L85 PathProgramCache]: Analyzing trace with hash -313009237, now seen corresponding path program 3 times [2024-06-04 16:01:21,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:21,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555638995] [2024-06-04 16:01:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:21,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:21,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:21,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555638995] [2024-06-04 16:01:21,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555638995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:21,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:21,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:21,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063165581] [2024-06-04 16:01:21,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:21,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:21,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:21,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:21,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:21,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:21,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 101 transitions, 788 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:21,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:21,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:21,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:21,590 INFO L124 PetriNetUnfolderBase]: 1043/1720 cut-off events. [2024-06-04 16:01:21,590 INFO L125 PetriNetUnfolderBase]: For 8135/8135 co-relation queries the response was YES. [2024-06-04 16:01:21,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7300 conditions, 1720 events. 1043/1720 cut-off events. For 8135/8135 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8717 event pairs, 335 based on Foata normal form. 2/1718 useless extension candidates. Maximal degree in co-relation 7261. Up to 1499 conditions per place. [2024-06-04 16:01:21,602 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 91 selfloop transitions, 23 changer transitions 0/120 dead transitions. [2024-06-04 16:01:21,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 120 transitions, 1067 flow [2024-06-04 16:01:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 16:01:21,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:01:21,603 INFO L175 Difference]: Start difference. First operand has 79 places, 101 transitions, 788 flow. Second operand 5 states and 123 transitions. [2024-06-04 16:01:21,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 120 transitions, 1067 flow [2024-06-04 16:01:21,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 120 transitions, 1041 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:21,612 INFO L231 Difference]: Finished difference. Result has 83 places, 101 transitions, 820 flow [2024-06-04 16:01:21,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=820, PETRI_PLACES=83, PETRI_TRANSITIONS=101} [2024-06-04 16:01:21,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-04 16:01:21,613 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 101 transitions, 820 flow [2024-06-04 16:01:21,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:21,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:21,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:21,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:01:21,614 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:21,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:21,614 INFO L85 PathProgramCache]: Analyzing trace with hash -313009423, now seen corresponding path program 3 times [2024-06-04 16:01:21,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:21,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426180499] [2024-06-04 16:01:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:21,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:21,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:21,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426180499] [2024-06-04 16:01:21,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426180499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:21,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:21,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:21,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802888157] [2024-06-04 16:01:21,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:21,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:21,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:21,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:21,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:21,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:21,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 101 transitions, 820 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:21,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:21,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:21,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:22,140 INFO L124 PetriNetUnfolderBase]: 971/1604 cut-off events. [2024-06-04 16:01:22,140 INFO L125 PetriNetUnfolderBase]: For 9643/9731 co-relation queries the response was YES. [2024-06-04 16:01:22,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7111 conditions, 1604 events. 971/1604 cut-off events. For 9643/9731 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8180 event pairs, 267 based on Foata normal form. 17/1577 useless extension candidates. Maximal degree in co-relation 7070. Up to 1304 conditions per place. [2024-06-04 16:01:22,152 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 68 selfloop transitions, 47 changer transitions 0/129 dead transitions. [2024-06-04 16:01:22,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 129 transitions, 1177 flow [2024-06-04 16:01:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:22,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 16:01:22,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-04 16:01:22,154 INFO L175 Difference]: Start difference. First operand has 83 places, 101 transitions, 820 flow. Second operand 6 states and 154 transitions. [2024-06-04 16:01:22,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 129 transitions, 1177 flow [2024-06-04 16:01:22,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 129 transitions, 1120 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:22,164 INFO L231 Difference]: Finished difference. Result has 86 places, 105 transitions, 928 flow [2024-06-04 16:01:22,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=928, PETRI_PLACES=86, PETRI_TRANSITIONS=105} [2024-06-04 16:01:22,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-04 16:01:22,164 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 105 transitions, 928 flow [2024-06-04 16:01:22,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:22,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:22,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:22,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:01:22,165 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:22,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:22,166 INFO L85 PathProgramCache]: Analyzing trace with hash -312763159, now seen corresponding path program 1 times [2024-06-04 16:01:22,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:22,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514066384] [2024-06-04 16:01:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:22,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:22,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:22,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514066384] [2024-06-04 16:01:22,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514066384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:22,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:22,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:22,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079893591] [2024-06-04 16:01:22,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:22,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:22,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:22,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:22,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:22,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:22,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 105 transitions, 928 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:22,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:22,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:22,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:22,663 INFO L124 PetriNetUnfolderBase]: 1034/1708 cut-off events. [2024-06-04 16:01:22,663 INFO L125 PetriNetUnfolderBase]: For 9784/9787 co-relation queries the response was YES. [2024-06-04 16:01:22,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7573 conditions, 1708 events. 1034/1708 cut-off events. For 9784/9787 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8658 event pairs, 313 based on Foata normal form. 6/1712 useless extension candidates. Maximal degree in co-relation 7531. Up to 1528 conditions per place. [2024-06-04 16:01:22,679 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 108 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2024-06-04 16:01:22,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 124 transitions, 1223 flow [2024-06-04 16:01:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-04 16:01:22,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-04 16:01:22,680 INFO L175 Difference]: Start difference. First operand has 86 places, 105 transitions, 928 flow. Second operand 5 states and 117 transitions. [2024-06-04 16:01:22,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 124 transitions, 1223 flow [2024-06-04 16:01:22,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 1129 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:22,696 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 877 flow [2024-06-04 16:01:22,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=877, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2024-06-04 16:01:22,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-04 16:01:22,697 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 877 flow [2024-06-04 16:01:22,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:22,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:22,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:22,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:01:22,700 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:22,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:22,700 INFO L85 PathProgramCache]: Analyzing trace with hash -496130211, now seen corresponding path program 1 times [2024-06-04 16:01:22,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:22,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614796795] [2024-06-04 16:01:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:22,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:22,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:22,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614796795] [2024-06-04 16:01:22,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614796795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:22,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:22,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:22,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093483460] [2024-06-04 16:01:22,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:22,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:22,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:22,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:22,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:23,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:23,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 877 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:23,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:23,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:23,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:23,208 INFO L124 PetriNetUnfolderBase]: 1045/1724 cut-off events. [2024-06-04 16:01:23,209 INFO L125 PetriNetUnfolderBase]: For 9506/9506 co-relation queries the response was YES. [2024-06-04 16:01:23,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7578 conditions, 1724 events. 1045/1724 cut-off events. For 9506/9506 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8683 event pairs, 308 based on Foata normal form. 2/1722 useless extension candidates. Maximal degree in co-relation 7535. Up to 1420 conditions per place. [2024-06-04 16:01:23,220 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 114 selfloop transitions, 34 changer transitions 0/154 dead transitions. [2024-06-04 16:01:23,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 154 transitions, 1399 flow [2024-06-04 16:01:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:01:23,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 16:01:23,222 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 877 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:01:23,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 154 transitions, 1399 flow [2024-06-04 16:01:23,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 154 transitions, 1374 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:23,233 INFO L231 Difference]: Finished difference. Result has 93 places, 120 transitions, 1050 flow [2024-06-04 16:01:23,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1050, PETRI_PLACES=93, PETRI_TRANSITIONS=120} [2024-06-04 16:01:23,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-04 16:01:23,233 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 120 transitions, 1050 flow [2024-06-04 16:01:23,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:23,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:23,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:23,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:01:23,234 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:23,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:23,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1544383235, now seen corresponding path program 2 times [2024-06-04 16:01:23,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:23,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345035215] [2024-06-04 16:01:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:23,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:23,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:23,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345035215] [2024-06-04 16:01:23,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345035215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:23,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:23,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:23,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766652894] [2024-06-04 16:01:23,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:23,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:23,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:23,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:23,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:23,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 120 transitions, 1050 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:23,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:23,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:23,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:23,793 INFO L124 PetriNetUnfolderBase]: 1072/1773 cut-off events. [2024-06-04 16:01:23,794 INFO L125 PetriNetUnfolderBase]: For 11542/11542 co-relation queries the response was YES. [2024-06-04 16:01:23,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8294 conditions, 1773 events. 1072/1773 cut-off events. For 11542/11542 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8975 event pairs, 308 based on Foata normal form. 2/1771 useless extension candidates. Maximal degree in co-relation 8248. Up to 1512 conditions per place. [2024-06-04 16:01:23,807 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 120 selfloop transitions, 30 changer transitions 0/156 dead transitions. [2024-06-04 16:01:23,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 156 transitions, 1532 flow [2024-06-04 16:01:23,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:23,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:23,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:01:23,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-04 16:01:23,809 INFO L175 Difference]: Start difference. First operand has 93 places, 120 transitions, 1050 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:01:23,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 156 transitions, 1532 flow [2024-06-04 16:01:23,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 156 transitions, 1480 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:23,825 INFO L231 Difference]: Finished difference. Result has 99 places, 127 transitions, 1142 flow [2024-06-04 16:01:23,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1142, PETRI_PLACES=99, PETRI_TRANSITIONS=127} [2024-06-04 16:01:23,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-04 16:01:23,825 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 127 transitions, 1142 flow [2024-06-04 16:01:23,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:23,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:23,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:23,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:01:23,826 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:23,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:23,827 INFO L85 PathProgramCache]: Analyzing trace with hash 504402473, now seen corresponding path program 3 times [2024-06-04 16:01:23,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:23,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837071447] [2024-06-04 16:01:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:23,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:24,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:24,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837071447] [2024-06-04 16:01:24,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837071447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:24,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:24,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:24,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923220034] [2024-06-04 16:01:24,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:24,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:24,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:24,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:24,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:24,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:24,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 127 transitions, 1142 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:24,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:24,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:24,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:24,417 INFO L124 PetriNetUnfolderBase]: 1067/1766 cut-off events. [2024-06-04 16:01:24,417 INFO L125 PetriNetUnfolderBase]: For 12838/12838 co-relation queries the response was YES. [2024-06-04 16:01:24,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8476 conditions, 1766 events. 1067/1766 cut-off events. For 12838/12838 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8963 event pairs, 308 based on Foata normal form. 2/1764 useless extension candidates. Maximal degree in co-relation 8427. Up to 1507 conditions per place. [2024-06-04 16:01:24,429 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 125 selfloop transitions, 32 changer transitions 0/163 dead transitions. [2024-06-04 16:01:24,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 163 transitions, 1559 flow [2024-06-04 16:01:24,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-04 16:01:24,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-04 16:01:24,432 INFO L175 Difference]: Start difference. First operand has 99 places, 127 transitions, 1142 flow. Second operand 9 states and 203 transitions. [2024-06-04 16:01:24,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 163 transitions, 1559 flow [2024-06-04 16:01:24,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 163 transitions, 1517 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:24,447 INFO L231 Difference]: Finished difference. Result has 105 places, 128 transitions, 1182 flow [2024-06-04 16:01:24,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1182, PETRI_PLACES=105, PETRI_TRANSITIONS=128} [2024-06-04 16:01:24,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-04 16:01:24,448 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 128 transitions, 1182 flow [2024-06-04 16:01:24,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:24,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:24,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:24,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:01:24,449 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:24,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash 203460605, now seen corresponding path program 4 times [2024-06-04 16:01:24,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:24,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744747206] [2024-06-04 16:01:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:24,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:24,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:24,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744747206] [2024-06-04 16:01:24,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744747206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:24,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:24,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:24,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937416520] [2024-06-04 16:01:24,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:24,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:24,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:24,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:24,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:24,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:24,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 128 transitions, 1182 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:24,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:24,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:24,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:24,976 INFO L124 PetriNetUnfolderBase]: 1078/1787 cut-off events. [2024-06-04 16:01:24,976 INFO L125 PetriNetUnfolderBase]: For 14353/14353 co-relation queries the response was YES. [2024-06-04 16:01:24,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8782 conditions, 1787 events. 1078/1787 cut-off events. For 14353/14353 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9117 event pairs, 308 based on Foata normal form. 2/1785 useless extension candidates. Maximal degree in co-relation 8731. Up to 1474 conditions per place. [2024-06-04 16:01:24,988 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 114 selfloop transitions, 40 changer transitions 0/160 dead transitions. [2024-06-04 16:01:24,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 160 transitions, 1653 flow [2024-06-04 16:01:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 16:01:24,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:01:24,990 INFO L175 Difference]: Start difference. First operand has 105 places, 128 transitions, 1182 flow. Second operand 6 states and 150 transitions. [2024-06-04 16:01:24,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 160 transitions, 1653 flow [2024-06-04 16:01:25,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 160 transitions, 1587 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:25,005 INFO L231 Difference]: Finished difference. Result has 105 places, 132 transitions, 1265 flow [2024-06-04 16:01:25,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1265, PETRI_PLACES=105, PETRI_TRANSITIONS=132} [2024-06-04 16:01:25,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-04 16:01:25,006 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 132 transitions, 1265 flow [2024-06-04 16:01:25,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:25,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:25,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:25,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:01:25,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:25,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1105999029, now seen corresponding path program 5 times [2024-06-04 16:01:25,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:25,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870727467] [2024-06-04 16:01:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:25,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:25,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870727467] [2024-06-04 16:01:25,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870727467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:25,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:25,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:25,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875477500] [2024-06-04 16:01:25,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:25,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:25,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:25,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:25,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:25,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 132 transitions, 1265 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:25,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:25,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:25,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:25,550 INFO L124 PetriNetUnfolderBase]: 1089/1813 cut-off events. [2024-06-04 16:01:25,551 INFO L125 PetriNetUnfolderBase]: For 16990/17002 co-relation queries the response was YES. [2024-06-04 16:01:25,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9162 conditions, 1813 events. 1089/1813 cut-off events. For 16990/17002 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9346 event pairs, 319 based on Foata normal form. 12/1820 useless extension candidates. Maximal degree in co-relation 9109. Up to 1486 conditions per place. [2024-06-04 16:01:25,564 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 45 changer transitions 0/169 dead transitions. [2024-06-04 16:01:25,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 169 transitions, 1784 flow [2024-06-04 16:01:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:01:25,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-04 16:01:25,567 INFO L175 Difference]: Start difference. First operand has 105 places, 132 transitions, 1265 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:01:25,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 169 transitions, 1784 flow [2024-06-04 16:01:25,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 169 transitions, 1680 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:25,587 INFO L231 Difference]: Finished difference. Result has 108 places, 136 transitions, 1313 flow [2024-06-04 16:01:25,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1313, PETRI_PLACES=108, PETRI_TRANSITIONS=136} [2024-06-04 16:01:25,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-04 16:01:25,588 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 136 transitions, 1313 flow [2024-06-04 16:01:25,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:25,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:25,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:25,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:01:25,588 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:25,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:25,589 INFO L85 PathProgramCache]: Analyzing trace with hash 203466185, now seen corresponding path program 6 times [2024-06-04 16:01:25,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:25,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262637604] [2024-06-04 16:01:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:25,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:25,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:25,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262637604] [2024-06-04 16:01:25,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262637604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:25,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:25,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:25,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197430913] [2024-06-04 16:01:25,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:25,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:25,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:25,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:25,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:25,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:25,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 136 transitions, 1313 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:25,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:25,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:25,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:26,171 INFO L124 PetriNetUnfolderBase]: 1084/1801 cut-off events. [2024-06-04 16:01:26,172 INFO L125 PetriNetUnfolderBase]: For 16028/16028 co-relation queries the response was YES. [2024-06-04 16:01:26,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9078 conditions, 1801 events. 1084/1801 cut-off events. For 16028/16028 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9205 event pairs, 308 based on Foata normal form. 2/1799 useless extension candidates. Maximal degree in co-relation 9025. Up to 1481 conditions per place. [2024-06-04 16:01:26,185 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 46 changer transitions 0/170 dead transitions. [2024-06-04 16:01:26,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 170 transitions, 1732 flow [2024-06-04 16:01:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:01:26,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 16:01:26,186 INFO L175 Difference]: Start difference. First operand has 108 places, 136 transitions, 1313 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:01:26,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 170 transitions, 1732 flow [2024-06-04 16:01:26,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 170 transitions, 1649 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:26,207 INFO L231 Difference]: Finished difference. Result has 112 places, 136 transitions, 1334 flow [2024-06-04 16:01:26,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1334, PETRI_PLACES=112, PETRI_TRANSITIONS=136} [2024-06-04 16:01:26,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-04 16:01:26,208 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 136 transitions, 1334 flow [2024-06-04 16:01:26,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:26,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:26,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:26,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:01:26,208 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:26,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:26,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1477445657, now seen corresponding path program 1 times [2024-06-04 16:01:26,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:26,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730391065] [2024-06-04 16:01:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:26,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:26,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:26,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730391065] [2024-06-04 16:01:26,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730391065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:26,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:26,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:26,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843471904] [2024-06-04 16:01:26,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:26,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:26,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:26,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:26,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:26,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:26,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 136 transitions, 1334 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 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) [2024-06-04 16:01:26,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:26,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:26,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:26,737 INFO L124 PetriNetUnfolderBase]: 994/1647 cut-off events. [2024-06-04 16:01:26,738 INFO L125 PetriNetUnfolderBase]: For 18443/18467 co-relation queries the response was YES. [2024-06-04 16:01:26,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8580 conditions, 1647 events. 994/1647 cut-off events. For 18443/18467 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8464 event pairs, 302 based on Foata normal form. 25/1652 useless extension candidates. Maximal degree in co-relation 8526. Up to 1400 conditions per place. [2024-06-04 16:01:26,749 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 104 selfloop transitions, 26 changer transitions 0/144 dead transitions. [2024-06-04 16:01:26,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 144 transitions, 1614 flow [2024-06-04 16:01:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:26,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-04 16:01:26,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-04 16:01:26,751 INFO L175 Difference]: Start difference. First operand has 112 places, 136 transitions, 1334 flow. Second operand 4 states and 99 transitions. [2024-06-04 16:01:26,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 144 transitions, 1614 flow [2024-06-04 16:01:26,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 144 transitions, 1483 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:01:26,770 INFO L231 Difference]: Finished difference. Result has 107 places, 136 transitions, 1267 flow [2024-06-04 16:01:26,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1267, PETRI_PLACES=107, PETRI_TRANSITIONS=136} [2024-06-04 16:01:26,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-04 16:01:26,771 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 136 transitions, 1267 flow [2024-06-04 16:01:26,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 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) [2024-06-04 16:01:26,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:26,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:26,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:01:26,771 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:26,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:26,772 INFO L85 PathProgramCache]: Analyzing trace with hash -190851664, now seen corresponding path program 1 times [2024-06-04 16:01:26,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:26,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405506571] [2024-06-04 16:01:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:26,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:27,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:27,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405506571] [2024-06-04 16:01:27,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405506571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:27,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:27,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:27,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471650116] [2024-06-04 16:01:27,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:27,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:27,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:27,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:27,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:27,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:27,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 136 transitions, 1267 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:27,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:27,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:27,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:27,341 INFO L124 PetriNetUnfolderBase]: 1102/1811 cut-off events. [2024-06-04 16:01:27,341 INFO L125 PetriNetUnfolderBase]: For 20914/20930 co-relation queries the response was YES. [2024-06-04 16:01:27,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9270 conditions, 1811 events. 1102/1811 cut-off events. For 20914/20930 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9308 event pairs, 191 based on Foata normal form. 18/1779 useless extension candidates. Maximal degree in co-relation 9216. Up to 1226 conditions per place. [2024-06-04 16:01:27,351 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 64 changer transitions 0/180 dead transitions. [2024-06-04 16:01:27,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 180 transitions, 1827 flow [2024-06-04 16:01:27,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:27,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-04 16:01:27,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-04 16:01:27,353 INFO L175 Difference]: Start difference. First operand has 107 places, 136 transitions, 1267 flow. Second operand 7 states and 186 transitions. [2024-06-04 16:01:27,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 180 transitions, 1827 flow [2024-06-04 16:01:27,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 180 transitions, 1763 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:27,371 INFO L231 Difference]: Finished difference. Result has 111 places, 140 transitions, 1382 flow [2024-06-04 16:01:27,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1382, PETRI_PLACES=111, PETRI_TRANSITIONS=140} [2024-06-04 16:01:27,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-04 16:01:27,371 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 140 transitions, 1382 flow [2024-06-04 16:01:27,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:27,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:27,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:27,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:01:27,372 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:27,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:27,372 INFO L85 PathProgramCache]: Analyzing trace with hash -746534866, now seen corresponding path program 2 times [2024-06-04 16:01:27,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:27,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537986958] [2024-06-04 16:01:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:27,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:27,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:27,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537986958] [2024-06-04 16:01:27,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537986958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:27,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:27,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:27,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867138875] [2024-06-04 16:01:27,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:27,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:27,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:27,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:27,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:27,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:27,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 140 transitions, 1382 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:27,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:27,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:27,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:27,927 INFO L124 PetriNetUnfolderBase]: 1147/1882 cut-off events. [2024-06-04 16:01:27,928 INFO L125 PetriNetUnfolderBase]: For 24436/24459 co-relation queries the response was YES. [2024-06-04 16:01:27,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10040 conditions, 1882 events. 1147/1882 cut-off events. For 24436/24459 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9821 event pairs, 283 based on Foata normal form. 16/1844 useless extension candidates. Maximal degree in co-relation 9986. Up to 1477 conditions per place. [2024-06-04 16:01:27,940 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 90 selfloop transitions, 62 changer transitions 0/176 dead transitions. [2024-06-04 16:01:27,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 176 transitions, 1838 flow [2024-06-04 16:01:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 16:01:27,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-04 16:01:27,941 INFO L175 Difference]: Start difference. First operand has 111 places, 140 transitions, 1382 flow. Second operand 7 states and 181 transitions. [2024-06-04 16:01:27,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 176 transitions, 1838 flow [2024-06-04 16:01:27,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 176 transitions, 1751 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:27,962 INFO L231 Difference]: Finished difference. Result has 115 places, 142 transitions, 1456 flow [2024-06-04 16:01:27,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1456, PETRI_PLACES=115, PETRI_TRANSITIONS=142} [2024-06-04 16:01:27,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-04 16:01:27,963 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 142 transitions, 1456 flow [2024-06-04 16:01:27,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:27,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:27,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:27,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:01:27,963 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:27,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:27,964 INFO L85 PathProgramCache]: Analyzing trace with hash -631243696, now seen corresponding path program 3 times [2024-06-04 16:01:27,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:27,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319588757] [2024-06-04 16:01:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:27,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:28,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:28,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319588757] [2024-06-04 16:01:28,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319588757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:28,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:28,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:28,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848117858] [2024-06-04 16:01:28,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:28,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:28,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:28,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:28,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 142 transitions, 1456 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:28,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:28,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:28,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:28,576 INFO L124 PetriNetUnfolderBase]: 1199/1966 cut-off events. [2024-06-04 16:01:28,577 INFO L125 PetriNetUnfolderBase]: For 27489/27512 co-relation queries the response was YES. [2024-06-04 16:01:28,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10763 conditions, 1966 events. 1199/1966 cut-off events. For 27489/27512 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10335 event pairs, 284 based on Foata normal form. 16/1931 useless extension candidates. Maximal degree in co-relation 10707. Up to 1626 conditions per place. [2024-06-04 16:01:28,589 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 111 selfloop transitions, 39 changer transitions 0/174 dead transitions. [2024-06-04 16:01:28,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 174 transitions, 1870 flow [2024-06-04 16:01:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:28,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 16:01:28,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:01:28,590 INFO L175 Difference]: Start difference. First operand has 115 places, 142 transitions, 1456 flow. Second operand 7 states and 175 transitions. [2024-06-04 16:01:28,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 174 transitions, 1870 flow [2024-06-04 16:01:28,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 174 transitions, 1741 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:28,614 INFO L231 Difference]: Finished difference. Result has 117 places, 144 transitions, 1446 flow [2024-06-04 16:01:28,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1446, PETRI_PLACES=117, PETRI_TRANSITIONS=144} [2024-06-04 16:01:28,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-04 16:01:28,615 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 144 transitions, 1446 flow [2024-06-04 16:01:28,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:28,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:28,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:28,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:01:28,616 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:28,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1915304844, now seen corresponding path program 1 times [2024-06-04 16:01:28,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:28,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034540337] [2024-06-04 16:01:28,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:28,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:28,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:28,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034540337] [2024-06-04 16:01:28,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034540337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:28,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:28,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:28,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848732394] [2024-06-04 16:01:28,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:28,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:28,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:28,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:28,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:28,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 144 transitions, 1446 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:28,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:28,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:28,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:29,197 INFO L124 PetriNetUnfolderBase]: 1270/2072 cut-off events. [2024-06-04 16:01:29,197 INFO L125 PetriNetUnfolderBase]: For 25890/25890 co-relation queries the response was YES. [2024-06-04 16:01:29,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11123 conditions, 2072 events. 1270/2072 cut-off events. For 25890/25890 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10812 event pairs, 310 based on Foata normal form. 4/2072 useless extension candidates. Maximal degree in co-relation 11066. Up to 1832 conditions per place. [2024-06-04 16:01:29,212 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 143 selfloop transitions, 25 changer transitions 0/174 dead transitions. [2024-06-04 16:01:29,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 174 transitions, 1871 flow [2024-06-04 16:01:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:01:29,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-04 16:01:29,213 INFO L175 Difference]: Start difference. First operand has 117 places, 144 transitions, 1446 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:01:29,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 174 transitions, 1871 flow [2024-06-04 16:01:29,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 174 transitions, 1784 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:29,239 INFO L231 Difference]: Finished difference. Result has 119 places, 146 transitions, 1434 flow [2024-06-04 16:01:29,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1434, PETRI_PLACES=119, PETRI_TRANSITIONS=146} [2024-06-04 16:01:29,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-04 16:01:29,240 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 146 transitions, 1434 flow [2024-06-04 16:01:29,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:29,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:29,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:29,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:01:29,240 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:29,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:29,241 INFO L85 PathProgramCache]: Analyzing trace with hash -154309328, now seen corresponding path program 4 times [2024-06-04 16:01:29,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:29,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763324891] [2024-06-04 16:01:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:29,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:29,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:29,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763324891] [2024-06-04 16:01:29,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763324891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:29,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:29,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:29,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824238753] [2024-06-04 16:01:29,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:29,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:29,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:29,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:29,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:29,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:29,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 146 transitions, 1434 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:29,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:29,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:29,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:29,870 INFO L124 PetriNetUnfolderBase]: 1183/1948 cut-off events. [2024-06-04 16:01:29,870 INFO L125 PetriNetUnfolderBase]: For 29278/29305 co-relation queries the response was YES. [2024-06-04 16:01:29,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10583 conditions, 1948 events. 1183/1948 cut-off events. For 29278/29305 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10223 event pairs, 184 based on Foata normal form. 24/1923 useless extension candidates. Maximal degree in co-relation 10525. Up to 1438 conditions per place. [2024-06-04 16:01:29,881 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 93 selfloop transitions, 59 changer transitions 0/177 dead transitions. [2024-06-04 16:01:29,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 177 transitions, 1864 flow [2024-06-04 16:01:29,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 16:01:29,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-04 16:01:29,882 INFO L175 Difference]: Start difference. First operand has 119 places, 146 transitions, 1434 flow. Second operand 7 states and 178 transitions. [2024-06-04 16:01:29,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 177 transitions, 1864 flow [2024-06-04 16:01:29,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 177 transitions, 1799 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:29,905 INFO L231 Difference]: Finished difference. Result has 121 places, 146 transitions, 1506 flow [2024-06-04 16:01:29,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1506, PETRI_PLACES=121, PETRI_TRANSITIONS=146} [2024-06-04 16:01:29,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-04 16:01:29,906 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 146 transitions, 1506 flow [2024-06-04 16:01:29,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:29,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:29,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:29,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:01:29,906 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:29,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash 73776520, now seen corresponding path program 2 times [2024-06-04 16:01:29,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:29,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072773879] [2024-06-04 16:01:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:29,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:30,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:30,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072773879] [2024-06-04 16:01:30,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072773879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:30,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:30,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:30,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007254737] [2024-06-04 16:01:30,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:30,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:30,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:30,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:30,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:30,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 146 transitions, 1506 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:30,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:30,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:30,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:30,420 INFO L124 PetriNetUnfolderBase]: 1256/2059 cut-off events. [2024-06-04 16:01:30,421 INFO L125 PetriNetUnfolderBase]: For 28436/28448 co-relation queries the response was YES. [2024-06-04 16:01:30,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11204 conditions, 2059 events. 1256/2059 cut-off events. For 28436/28448 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10832 event pairs, 317 based on Foata normal form. 14/2068 useless extension candidates. Maximal degree in co-relation 11145. Up to 1814 conditions per place. [2024-06-04 16:01:30,434 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 139 selfloop transitions, 24 changer transitions 0/169 dead transitions. [2024-06-04 16:01:30,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 169 transitions, 1907 flow [2024-06-04 16:01:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:30,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-04 16:01:30,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650406504065041 [2024-06-04 16:01:30,435 INFO L175 Difference]: Start difference. First operand has 121 places, 146 transitions, 1506 flow. Second operand 6 states and 139 transitions. [2024-06-04 16:01:30,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 169 transitions, 1907 flow [2024-06-04 16:01:30,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 169 transitions, 1776 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:30,463 INFO L231 Difference]: Finished difference. Result has 121 places, 148 transitions, 1452 flow [2024-06-04 16:01:30,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1452, PETRI_PLACES=121, PETRI_TRANSITIONS=148} [2024-06-04 16:01:30,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-04 16:01:30,464 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 148 transitions, 1452 flow [2024-06-04 16:01:30,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:30,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:30,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:30,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:01:30,464 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:30,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:30,465 INFO L85 PathProgramCache]: Analyzing trace with hash 82347400, now seen corresponding path program 3 times [2024-06-04 16:01:30,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:30,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191455579] [2024-06-04 16:01:30,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:30,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:30,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:30,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191455579] [2024-06-04 16:01:30,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191455579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:30,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:30,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:30,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946889068] [2024-06-04 16:01:30,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:30,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:30,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:30,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:30,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:30,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:30,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 148 transitions, 1452 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:30,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:30,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:30,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:31,017 INFO L124 PetriNetUnfolderBase]: 1273/2086 cut-off events. [2024-06-04 16:01:31,017 INFO L125 PetriNetUnfolderBase]: For 28002/28014 co-relation queries the response was YES. [2024-06-04 16:01:31,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11216 conditions, 2086 events. 1273/2086 cut-off events. For 28002/28014 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11006 event pairs, 288 based on Foata normal form. 14/2095 useless extension candidates. Maximal degree in co-relation 11156. Up to 1758 conditions per place. [2024-06-04 16:01:31,033 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 139 selfloop transitions, 31 changer transitions 0/176 dead transitions. [2024-06-04 16:01:31,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 176 transitions, 1977 flow [2024-06-04 16:01:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:31,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:01:31,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 16:01:31,035 INFO L175 Difference]: Start difference. First operand has 121 places, 148 transitions, 1452 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:01:31,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 176 transitions, 1977 flow [2024-06-04 16:01:31,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 176 transitions, 1918 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:31,064 INFO L231 Difference]: Finished difference. Result has 123 places, 152 transitions, 1510 flow [2024-06-04 16:01:31,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1510, PETRI_PLACES=123, PETRI_TRANSITIONS=152} [2024-06-04 16:01:31,064 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-04 16:01:31,065 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 152 transitions, 1510 flow [2024-06-04 16:01:31,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:31,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:31,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:31,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:01:31,065 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:31,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:31,066 INFO L85 PathProgramCache]: Analyzing trace with hash -154124630, now seen corresponding path program 4 times [2024-06-04 16:01:31,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:31,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993942337] [2024-06-04 16:01:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:31,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:31,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:31,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993942337] [2024-06-04 16:01:31,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993942337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:31,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:31,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:31,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860776020] [2024-06-04 16:01:31,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:31,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:31,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:31,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:31,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:31,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:31,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 152 transitions, 1510 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:31,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:31,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:31,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:31,625 INFO L124 PetriNetUnfolderBase]: 1265/2069 cut-off events. [2024-06-04 16:01:31,625 INFO L125 PetriNetUnfolderBase]: For 29054/29054 co-relation queries the response was YES. [2024-06-04 16:01:31,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11303 conditions, 2069 events. 1265/2069 cut-off events. For 29054/29054 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10816 event pairs, 302 based on Foata normal form. 4/2069 useless extension candidates. Maximal degree in co-relation 11242. Up to 1811 conditions per place. [2024-06-04 16:01:31,638 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 143 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2024-06-04 16:01:31,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 176 transitions, 1915 flow [2024-06-04 16:01:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 16:01:31,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-04 16:01:31,639 INFO L175 Difference]: Start difference. First operand has 123 places, 152 transitions, 1510 flow. Second operand 6 states and 143 transitions. [2024-06-04 16:01:31,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 176 transitions, 1915 flow [2024-06-04 16:01:31,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 176 transitions, 1865 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:31,668 INFO L231 Difference]: Finished difference. Result has 127 places, 152 transitions, 1524 flow [2024-06-04 16:01:31,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1524, PETRI_PLACES=127, PETRI_TRANSITIONS=152} [2024-06-04 16:01:31,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-04 16:01:31,668 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 152 transitions, 1524 flow [2024-06-04 16:01:31,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:31,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:31,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:31,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:01:31,669 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:31,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:31,670 INFO L85 PathProgramCache]: Analyzing trace with hash -128441090, now seen corresponding path program 1 times [2024-06-04 16:01:31,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:31,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989147468] [2024-06-04 16:01:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:31,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:31,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:31,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989147468] [2024-06-04 16:01:31,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989147468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:31,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:31,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464209962] [2024-06-04 16:01:31,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:31,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:31,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:31,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:31,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:31,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 152 transitions, 1524 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:31,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:31,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:31,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:32,285 INFO L124 PetriNetUnfolderBase]: 1367/2255 cut-off events. [2024-06-04 16:01:32,285 INFO L125 PetriNetUnfolderBase]: For 36727/36727 co-relation queries the response was YES. [2024-06-04 16:01:32,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12354 conditions, 2255 events. 1367/2255 cut-off events. For 36727/36727 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12130 event pairs, 240 based on Foata normal form. 12/2263 useless extension candidates. Maximal degree in co-relation 12291. Up to 1541 conditions per place. [2024-06-04 16:01:32,298 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 147 selfloop transitions, 51 changer transitions 0/204 dead transitions. [2024-06-04 16:01:32,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 204 transitions, 2227 flow [2024-06-04 16:01:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:01:32,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-04 16:01:32,300 INFO L175 Difference]: Start difference. First operand has 127 places, 152 transitions, 1524 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:01:32,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 204 transitions, 2227 flow [2024-06-04 16:01:32,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 204 transitions, 2161 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:32,334 INFO L231 Difference]: Finished difference. Result has 132 places, 157 transitions, 1654 flow [2024-06-04 16:01:32,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1654, PETRI_PLACES=132, PETRI_TRANSITIONS=157} [2024-06-04 16:01:32,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-04 16:01:32,335 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 157 transitions, 1654 flow [2024-06-04 16:01:32,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:32,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:32,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:32,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:01:32,335 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:32,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -39875330, now seen corresponding path program 2 times [2024-06-04 16:01:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:32,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447216762] [2024-06-04 16:01:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:32,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:32,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:32,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447216762] [2024-06-04 16:01:32,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447216762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:32,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:32,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:32,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883948661] [2024-06-04 16:01:32,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:32,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:32,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:32,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:32,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:32,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:32,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 157 transitions, 1654 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:32,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:32,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:32,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:33,005 INFO L124 PetriNetUnfolderBase]: 1494/2476 cut-off events. [2024-06-04 16:01:33,006 INFO L125 PetriNetUnfolderBase]: For 44794/44794 co-relation queries the response was YES. [2024-06-04 16:01:33,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13943 conditions, 2476 events. 1494/2476 cut-off events. For 44794/44794 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13691 event pairs, 349 based on Foata normal form. 12/2484 useless extension candidates. Maximal degree in co-relation 13877. Up to 1923 conditions per place. [2024-06-04 16:01:33,023 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 147 selfloop transitions, 50 changer transitions 0/203 dead transitions. [2024-06-04 16:01:33,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 203 transitions, 2308 flow [2024-06-04 16:01:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:01:33,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-04 16:01:33,025 INFO L175 Difference]: Start difference. First operand has 132 places, 157 transitions, 1654 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:01:33,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 203 transitions, 2308 flow [2024-06-04 16:01:33,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 203 transitions, 2223 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:33,070 INFO L231 Difference]: Finished difference. Result has 138 places, 160 transitions, 1727 flow [2024-06-04 16:01:33,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1573, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1727, PETRI_PLACES=138, PETRI_TRANSITIONS=160} [2024-06-04 16:01:33,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-04 16:01:33,071 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 160 transitions, 1727 flow [2024-06-04 16:01:33,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:33,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:33,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:33,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:01:33,072 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:33,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:33,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1667595234, now seen corresponding path program 3 times [2024-06-04 16:01:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:33,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423474845] [2024-06-04 16:01:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:33,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:33,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:33,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423474845] [2024-06-04 16:01:33,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423474845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:33,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:33,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:33,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241511075] [2024-06-04 16:01:33,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:33,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:33,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:33,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:33,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:33,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:33,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 160 transitions, 1727 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:33,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:33,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:33,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:33,685 INFO L124 PetriNetUnfolderBase]: 1466/2432 cut-off events. [2024-06-04 16:01:33,686 INFO L125 PetriNetUnfolderBase]: For 44768/44768 co-relation queries the response was YES. [2024-06-04 16:01:33,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13651 conditions, 2432 events. 1466/2432 cut-off events. For 44768/44768 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13388 event pairs, 350 based on Foata normal form. 16/2444 useless extension candidates. Maximal degree in co-relation 13582. Up to 2002 conditions per place. [2024-06-04 16:01:33,702 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 144 selfloop transitions, 49 changer transitions 0/199 dead transitions. [2024-06-04 16:01:33,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 199 transitions, 2242 flow [2024-06-04 16:01:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 16:01:33,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-04 16:01:33,704 INFO L175 Difference]: Start difference. First operand has 138 places, 160 transitions, 1727 flow. Second operand 8 states and 190 transitions. [2024-06-04 16:01:33,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 199 transitions, 2242 flow [2024-06-04 16:01:33,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 199 transitions, 2165 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:33,753 INFO L231 Difference]: Finished difference. Result has 142 places, 161 transitions, 1775 flow [2024-06-04 16:01:33,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1775, PETRI_PLACES=142, PETRI_TRANSITIONS=161} [2024-06-04 16:01:33,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-04 16:01:33,753 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 161 transitions, 1775 flow [2024-06-04 16:01:33,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:33,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:33,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:33,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:01:33,754 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:33,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:33,754 INFO L85 PathProgramCache]: Analyzing trace with hash -760668486, now seen corresponding path program 4 times [2024-06-04 16:01:33,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:33,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486673986] [2024-06-04 16:01:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:33,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:33,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:33,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486673986] [2024-06-04 16:01:33,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486673986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:33,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:33,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:33,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986978829] [2024-06-04 16:01:33,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:33,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:33,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:33,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:33,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:34,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:34,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 161 transitions, 1775 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:34,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:34,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:34,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:34,461 INFO L124 PetriNetUnfolderBase]: 1524/2540 cut-off events. [2024-06-04 16:01:34,462 INFO L125 PetriNetUnfolderBase]: For 47899/47899 co-relation queries the response was YES. [2024-06-04 16:01:34,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14254 conditions, 2540 events. 1524/2540 cut-off events. For 47899/47899 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14256 event pairs, 367 based on Foata normal form. 16/2552 useless extension candidates. Maximal degree in co-relation 14183. Up to 2169 conditions per place. [2024-06-04 16:01:34,481 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 32 changer transitions 0/197 dead transitions. [2024-06-04 16:01:34,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 197 transitions, 2277 flow [2024-06-04 16:01:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:01:34,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 16:01:34,482 INFO L175 Difference]: Start difference. First operand has 142 places, 161 transitions, 1775 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:01:34,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 197 transitions, 2277 flow [2024-06-04 16:01:34,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 197 transitions, 2182 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:34,543 INFO L231 Difference]: Finished difference. Result has 144 places, 162 transitions, 1770 flow [2024-06-04 16:01:34,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1770, PETRI_PLACES=144, PETRI_TRANSITIONS=162} [2024-06-04 16:01:34,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-04 16:01:34,543 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 162 transitions, 1770 flow [2024-06-04 16:01:34,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:34,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:34,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:34,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:01:34,544 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:34,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:34,544 INFO L85 PathProgramCache]: Analyzing trace with hash -760816356, now seen corresponding path program 5 times [2024-06-04 16:01:34,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:34,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269197469] [2024-06-04 16:01:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:34,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:34,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:34,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269197469] [2024-06-04 16:01:34,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269197469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:34,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:34,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:34,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197824641] [2024-06-04 16:01:34,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:34,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:34,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:34,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:34,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:34,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:34,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 162 transitions, 1770 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:34,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:34,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:34,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:35,287 INFO L124 PetriNetUnfolderBase]: 1651/2753 cut-off events. [2024-06-04 16:01:35,288 INFO L125 PetriNetUnfolderBase]: For 56431/56431 co-relation queries the response was YES. [2024-06-04 16:01:35,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15660 conditions, 2753 events. 1651/2753 cut-off events. For 56431/56431 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15873 event pairs, 386 based on Foata normal form. 12/2761 useless extension candidates. Maximal degree in co-relation 15588. Up to 2167 conditions per place. [2024-06-04 16:01:35,305 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 34 changer transitions 0/205 dead transitions. [2024-06-04 16:01:35,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 205 transitions, 2438 flow [2024-06-04 16:01:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:01:35,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-04 16:01:35,307 INFO L175 Difference]: Start difference. First operand has 144 places, 162 transitions, 1770 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:01:35,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 205 transitions, 2438 flow [2024-06-04 16:01:35,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 205 transitions, 2369 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:35,359 INFO L231 Difference]: Finished difference. Result has 147 places, 165 transitions, 1836 flow [2024-06-04 16:01:35,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1836, PETRI_PLACES=147, PETRI_TRANSITIONS=165} [2024-06-04 16:01:35,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-04 16:01:35,360 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 165 transitions, 1836 flow [2024-06-04 16:01:35,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:35,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:35,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:35,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:01:35,361 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:35,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:35,361 INFO L85 PathProgramCache]: Analyzing trace with hash -755306106, now seen corresponding path program 6 times [2024-06-04 16:01:35,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:35,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417527617] [2024-06-04 16:01:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:35,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:35,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:35,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417527617] [2024-06-04 16:01:35,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417527617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:35,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:35,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:35,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133654175] [2024-06-04 16:01:35,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:35,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:35,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:35,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:35,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:35,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:35,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 165 transitions, 1836 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:35,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:35,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:35,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:36,093 INFO L124 PetriNetUnfolderBase]: 1623/2709 cut-off events. [2024-06-04 16:01:36,093 INFO L125 PetriNetUnfolderBase]: For 56295/56295 co-relation queries the response was YES. [2024-06-04 16:01:36,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15278 conditions, 2709 events. 1623/2709 cut-off events. For 56295/56295 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15566 event pairs, 387 based on Foata normal form. 16/2721 useless extension candidates. Maximal degree in co-relation 15204. Up to 2338 conditions per place. [2024-06-04 16:01:36,112 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 33 changer transitions 0/209 dead transitions. [2024-06-04 16:01:36,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 209 transitions, 2387 flow [2024-06-04 16:01:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:01:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:01:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-04 16:01:36,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:01:36,113 INFO L175 Difference]: Start difference. First operand has 147 places, 165 transitions, 1836 flow. Second operand 10 states and 225 transitions. [2024-06-04 16:01:36,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 209 transitions, 2387 flow [2024-06-04 16:01:36,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 209 transitions, 2323 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:36,221 INFO L231 Difference]: Finished difference. Result has 153 places, 166 transitions, 1869 flow [2024-06-04 16:01:36,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1869, PETRI_PLACES=153, PETRI_TRANSITIONS=166} [2024-06-04 16:01:36,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-04 16:01:36,222 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 166 transitions, 1869 flow [2024-06-04 16:01:36,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:36,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:36,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:36,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:01:36,222 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:36,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:36,222 INFO L85 PathProgramCache]: Analyzing trace with hash -755090904, now seen corresponding path program 1 times [2024-06-04 16:01:36,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:36,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88660045] [2024-06-04 16:01:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:36,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:36,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:36,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88660045] [2024-06-04 16:01:36,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88660045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:36,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:36,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:36,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675801227] [2024-06-04 16:01:36,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:36,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:36,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:36,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:36,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:36,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:36,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 166 transitions, 1869 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:36,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:36,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:36,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:36,969 INFO L124 PetriNetUnfolderBase]: 1664/2790 cut-off events. [2024-06-04 16:01:36,969 INFO L125 PetriNetUnfolderBase]: For 57855/57855 co-relation queries the response was YES. [2024-06-04 16:01:36,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15661 conditions, 2790 events. 1664/2790 cut-off events. For 57855/57855 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16232 event pairs, 385 based on Foata normal form. 12/2798 useless extension candidates. Maximal degree in co-relation 15585. Up to 2230 conditions per place. [2024-06-04 16:01:36,991 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 37 changer transitions 0/213 dead transitions. [2024-06-04 16:01:36,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 213 transitions, 2434 flow [2024-06-04 16:01:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:01:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:01:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-04 16:01:36,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536585365853659 [2024-06-04 16:01:36,992 INFO L175 Difference]: Start difference. First operand has 153 places, 166 transitions, 1869 flow. Second operand 10 states and 227 transitions. [2024-06-04 16:01:36,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 213 transitions, 2434 flow [2024-06-04 16:01:37,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 213 transitions, 2369 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 16:01:37,065 INFO L231 Difference]: Finished difference. Result has 155 places, 167 transitions, 1902 flow [2024-06-04 16:01:37,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1902, PETRI_PLACES=155, PETRI_TRANSITIONS=167} [2024-06-04 16:01:37,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-04 16:01:37,066 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 167 transitions, 1902 flow [2024-06-04 16:01:37,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:37,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:37,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:37,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:01:37,066 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:37,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:37,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2008109302, now seen corresponding path program 7 times [2024-06-04 16:01:37,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:37,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747108831] [2024-06-04 16:01:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:37,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:37,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:37,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747108831] [2024-06-04 16:01:37,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747108831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:37,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:37,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:37,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012586046] [2024-06-04 16:01:37,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:37,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:37,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:37,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:37,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:37,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:37,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 167 transitions, 1902 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:37,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:37,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:37,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:37,799 INFO L124 PetriNetUnfolderBase]: 1722/2893 cut-off events. [2024-06-04 16:01:37,799 INFO L125 PetriNetUnfolderBase]: For 64774/64786 co-relation queries the response was YES. [2024-06-04 16:01:37,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16280 conditions, 2893 events. 1722/2893 cut-off events. For 64774/64786 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17122 event pairs, 423 based on Foata normal form. 26/2914 useless extension candidates. Maximal degree in co-relation 16203. Up to 2456 conditions per place. [2024-06-04 16:01:37,822 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 155 selfloop transitions, 46 changer transitions 0/207 dead transitions. [2024-06-04 16:01:37,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 207 transitions, 2438 flow [2024-06-04 16:01:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-04 16:01:37,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-04 16:01:37,823 INFO L175 Difference]: Start difference. First operand has 155 places, 167 transitions, 1902 flow. Second operand 9 states and 205 transitions. [2024-06-04 16:01:37,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 207 transitions, 2438 flow [2024-06-04 16:01:37,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 207 transitions, 2354 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:01:37,900 INFO L231 Difference]: Finished difference. Result has 156 places, 168 transitions, 1940 flow [2024-06-04 16:01:37,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1940, PETRI_PLACES=156, PETRI_TRANSITIONS=168} [2024-06-04 16:01:37,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-04 16:01:37,901 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 168 transitions, 1940 flow [2024-06-04 16:01:37,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:37,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:37,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:37,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:01:37,901 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:37,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:37,902 INFO L85 PathProgramCache]: Analyzing trace with hash -483110360, now seen corresponding path program 8 times [2024-06-04 16:01:37,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:37,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135231058] [2024-06-04 16:01:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:37,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:38,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:38,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135231058] [2024-06-04 16:01:38,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135231058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:38,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:38,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:38,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885661328] [2024-06-04 16:01:38,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:38,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:38,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:38,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:38,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:38,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:38,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 168 transitions, 1940 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:38,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:38,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:38,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:38,625 INFO L124 PetriNetUnfolderBase]: 1780/2986 cut-off events. [2024-06-04 16:01:38,625 INFO L125 PetriNetUnfolderBase]: For 68523/68523 co-relation queries the response was YES. [2024-06-04 16:01:38,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16838 conditions, 2986 events. 1780/2986 cut-off events. For 68523/68523 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17696 event pairs, 422 based on Foata normal form. 16/2998 useless extension candidates. Maximal degree in co-relation 16760. Up to 2462 conditions per place. [2024-06-04 16:01:38,646 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 157 selfloop transitions, 48 changer transitions 0/211 dead transitions. [2024-06-04 16:01:38,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 211 transitions, 2494 flow [2024-06-04 16:01:38,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-04 16:01:38,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-04 16:01:38,661 INFO L175 Difference]: Start difference. First operand has 156 places, 168 transitions, 1940 flow. Second operand 9 states and 210 transitions. [2024-06-04 16:01:38,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 211 transitions, 2494 flow [2024-06-04 16:01:38,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 211 transitions, 2393 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:38,736 INFO L231 Difference]: Finished difference. Result has 158 places, 169 transitions, 1970 flow [2024-06-04 16:01:38,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1970, PETRI_PLACES=158, PETRI_TRANSITIONS=169} [2024-06-04 16:01:38,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-04 16:01:38,736 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 169 transitions, 1970 flow [2024-06-04 16:01:38,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:38,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:38,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:38,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:01:38,737 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:38,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash -488472740, now seen corresponding path program 9 times [2024-06-04 16:01:38,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:38,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237195033] [2024-06-04 16:01:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:38,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:38,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:38,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237195033] [2024-06-04 16:01:38,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237195033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:38,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:38,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:38,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102317464] [2024-06-04 16:01:38,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:38,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:38,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:39,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:39,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 169 transitions, 1970 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:39,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:39,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:39,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:39,436 INFO L124 PetriNetUnfolderBase]: 1813/3055 cut-off events. [2024-06-04 16:01:39,436 INFO L125 PetriNetUnfolderBase]: For 71121/71121 co-relation queries the response was YES. [2024-06-04 16:01:39,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17112 conditions, 3055 events. 1813/3055 cut-off events. For 71121/71121 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18290 event pairs, 435 based on Foata normal form. 16/3067 useless extension candidates. Maximal degree in co-relation 17033. Up to 2521 conditions per place. [2024-06-04 16:01:39,458 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 152 selfloop transitions, 46 changer transitions 0/204 dead transitions. [2024-06-04 16:01:39,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 204 transitions, 2492 flow [2024-06-04 16:01:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:01:39,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 16:01:39,459 INFO L175 Difference]: Start difference. First operand has 158 places, 169 transitions, 1970 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:01:39,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 204 transitions, 2492 flow [2024-06-04 16:01:39,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 204 transitions, 2390 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:39,549 INFO L231 Difference]: Finished difference. Result has 158 places, 170 transitions, 1997 flow [2024-06-04 16:01:39,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1997, PETRI_PLACES=158, PETRI_TRANSITIONS=170} [2024-06-04 16:01:39,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-04 16:01:39,550 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 170 transitions, 1997 flow [2024-06-04 16:01:39,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:39,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:39,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:39,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:01:39,550 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:39,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash -488620610, now seen corresponding path program 10 times [2024-06-04 16:01:39,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:39,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043484910] [2024-06-04 16:01:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:39,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:39,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043484910] [2024-06-04 16:01:39,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043484910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:39,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:39,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:39,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299336738] [2024-06-04 16:01:39,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:39,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:39,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:39,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:39,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:39,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:39,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 170 transitions, 1997 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:39,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:39,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:39,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:40,224 INFO L124 PetriNetUnfolderBase]: 1793/3023 cut-off events. [2024-06-04 16:01:40,225 INFO L125 PetriNetUnfolderBase]: For 66780/66780 co-relation queries the response was YES. [2024-06-04 16:01:40,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16664 conditions, 3023 events. 1793/3023 cut-off events. For 66780/66780 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18045 event pairs, 311 based on Foata normal form. 12/3031 useless extension candidates. Maximal degree in co-relation 16584. Up to 2009 conditions per place. [2024-06-04 16:01:40,250 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 149 selfloop transitions, 54 changer transitions 0/209 dead transitions. [2024-06-04 16:01:40,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 209 transitions, 2554 flow [2024-06-04 16:01:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:01:40,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-04 16:01:40,251 INFO L175 Difference]: Start difference. First operand has 158 places, 170 transitions, 1997 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:01:40,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 209 transitions, 2554 flow [2024-06-04 16:01:40,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 209 transitions, 2444 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:40,351 INFO L231 Difference]: Finished difference. Result has 161 places, 172 transitions, 2066 flow [2024-06-04 16:01:40,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2066, PETRI_PLACES=161, PETRI_TRANSITIONS=172} [2024-06-04 16:01:40,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-04 16:01:40,352 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 172 transitions, 2066 flow [2024-06-04 16:01:40,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:40,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:40,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:40,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:01:40,353 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:40,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2037241174, now seen corresponding path program 2 times [2024-06-04 16:01:40,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:40,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341084473] [2024-06-04 16:01:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:40,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:40,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:40,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341084473] [2024-06-04 16:01:40,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341084473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:40,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:40,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:40,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265237837] [2024-06-04 16:01:40,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:40,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:40,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:40,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:40,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:40,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:40,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 172 transitions, 2066 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:40,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:40,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:40,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:41,208 INFO L124 PetriNetUnfolderBase]: 1834/3104 cut-off events. [2024-06-04 16:01:41,208 INFO L125 PetriNetUnfolderBase]: For 70831/70831 co-relation queries the response was YES. [2024-06-04 16:01:41,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17189 conditions, 3104 events. 1834/3104 cut-off events. For 70831/70831 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18716 event pairs, 404 based on Foata normal form. 12/3112 useless extension candidates. Maximal degree in co-relation 17107. Up to 2202 conditions per place. [2024-06-04 16:01:41,234 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 56 changer transitions 0/218 dead transitions. [2024-06-04 16:01:41,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 218 transitions, 2641 flow [2024-06-04 16:01:41,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-04 16:01:41,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-04 16:01:41,236 INFO L175 Difference]: Start difference. First operand has 161 places, 172 transitions, 2066 flow. Second operand 9 states and 212 transitions. [2024-06-04 16:01:41,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 218 transitions, 2641 flow [2024-06-04 16:01:41,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 218 transitions, 2474 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:41,342 INFO L231 Difference]: Finished difference. Result has 163 places, 173 transitions, 2039 flow [2024-06-04 16:01:41,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2039, PETRI_PLACES=163, PETRI_TRANSITIONS=173} [2024-06-04 16:01:41,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-04 16:01:41,343 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 173 transitions, 2039 flow [2024-06-04 16:01:41,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:41,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:41,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:41,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:01:41,343 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:41,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:41,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2007894100, now seen corresponding path program 3 times [2024-06-04 16:01:41,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:41,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553045111] [2024-06-04 16:01:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:41,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:41,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:41,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553045111] [2024-06-04 16:01:41,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553045111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:41,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:41,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:41,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221049751] [2024-06-04 16:01:41,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:41,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:41,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:41,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:41,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:41,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 173 transitions, 2039 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:41,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:41,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:41,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:42,149 INFO L124 PetriNetUnfolderBase]: 1875/3190 cut-off events. [2024-06-04 16:01:42,149 INFO L125 PetriNetUnfolderBase]: For 71361/71373 co-relation queries the response was YES. [2024-06-04 16:01:42,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17284 conditions, 3190 events. 1875/3190 cut-off events. For 71361/71373 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19553 event pairs, 447 based on Foata normal form. 22/3207 useless extension candidates. Maximal degree in co-relation 17203. Up to 2636 conditions per place. [2024-06-04 16:01:42,175 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 49 changer transitions 0/220 dead transitions. [2024-06-04 16:01:42,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 220 transitions, 2622 flow [2024-06-04 16:01:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:01:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:01:42,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-04 16:01:42,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536585365853659 [2024-06-04 16:01:42,177 INFO L175 Difference]: Start difference. First operand has 163 places, 173 transitions, 2039 flow. Second operand 10 states and 227 transitions. [2024-06-04 16:01:42,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 220 transitions, 2622 flow [2024-06-04 16:01:42,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 220 transitions, 2494 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:42,283 INFO L231 Difference]: Finished difference. Result has 166 places, 174 transitions, 2037 flow [2024-06-04 16:01:42,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2037, PETRI_PLACES=166, PETRI_TRANSITIONS=174} [2024-06-04 16:01:42,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-04 16:01:42,283 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 174 transitions, 2037 flow [2024-06-04 16:01:42,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:42,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:42,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:42,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:01:42,284 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:42,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:42,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1835892454, now seen corresponding path program 4 times [2024-06-04 16:01:42,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:42,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778298442] [2024-06-04 16:01:42,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:42,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:42,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:42,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778298442] [2024-06-04 16:01:42,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778298442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:42,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:42,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:42,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926321309] [2024-06-04 16:01:42,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:42,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:42,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:42,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:42,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:42,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:42,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 174 transitions, 2037 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:42,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:42,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:42,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:43,023 INFO L124 PetriNetUnfolderBase]: 1855/3158 cut-off events. [2024-06-04 16:01:43,023 INFO L125 PetriNetUnfolderBase]: For 64159/64171 co-relation queries the response was YES. [2024-06-04 16:01:43,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16631 conditions, 3158 events. 1855/3158 cut-off events. For 64159/64171 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19275 event pairs, 404 based on Foata normal form. 22/3175 useless extension candidates. Maximal degree in co-relation 16549. Up to 1952 conditions per place. [2024-06-04 16:01:43,049 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 150 selfloop transitions, 60 changer transitions 0/216 dead transitions. [2024-06-04 16:01:43,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 216 transitions, 2518 flow [2024-06-04 16:01:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:43,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-04 16:01:43,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:01:43,050 INFO L175 Difference]: Start difference. First operand has 166 places, 174 transitions, 2037 flow. Second operand 9 states and 207 transitions. [2024-06-04 16:01:43,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 216 transitions, 2518 flow [2024-06-04 16:01:43,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 216 transitions, 2408 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 16:01:43,148 INFO L231 Difference]: Finished difference. Result has 166 places, 173 transitions, 1985 flow [2024-06-04 16:01:43,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1985, PETRI_PLACES=166, PETRI_TRANSITIONS=173} [2024-06-04 16:01:43,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-04 16:01:43,149 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 173 transitions, 1985 flow [2024-06-04 16:01:43,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:43,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:43,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:43,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:01:43,149 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:43,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:43,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1469963956, now seen corresponding path program 1 times [2024-06-04 16:01:43,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:43,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508943048] [2024-06-04 16:01:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:43,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:43,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:43,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508943048] [2024-06-04 16:01:43,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508943048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:43,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:43,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:43,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834736982] [2024-06-04 16:01:43,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:43,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:43,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:43,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:43,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 173 transitions, 1985 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:43,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:43,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:43,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:43,942 INFO L124 PetriNetUnfolderBase]: 1860/3177 cut-off events. [2024-06-04 16:01:43,942 INFO L125 PetriNetUnfolderBase]: For 60902/60905 co-relation queries the response was YES. [2024-06-04 16:01:43,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16830 conditions, 3177 events. 1860/3177 cut-off events. For 60902/60905 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19555 event pairs, 432 based on Foata normal form. 3/3178 useless extension candidates. Maximal degree in co-relation 16747. Up to 2913 conditions per place. [2024-06-04 16:01:43,967 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 172 selfloop transitions, 18 changer transitions 0/196 dead transitions. [2024-06-04 16:01:43,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 196 transitions, 2547 flow [2024-06-04 16:01:43,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-04 16:01:43,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156794425087108 [2024-06-04 16:01:43,968 INFO L175 Difference]: Start difference. First operand has 166 places, 173 transitions, 1985 flow. Second operand 7 states and 148 transitions. [2024-06-04 16:01:43,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 196 transitions, 2547 flow [2024-06-04 16:01:44,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 196 transitions, 2378 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 16:01:44,056 INFO L231 Difference]: Finished difference. Result has 165 places, 179 transitions, 1928 flow [2024-06-04 16:01:44,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1928, PETRI_PLACES=165, PETRI_TRANSITIONS=179} [2024-06-04 16:01:44,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-04 16:01:44,056 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 179 transitions, 1928 flow [2024-06-04 16:01:44,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:44,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:44,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:44,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:01:44,057 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:44,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:44,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1469843986, now seen corresponding path program 2 times [2024-06-04 16:01:44,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:44,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245610997] [2024-06-04 16:01:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:44,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:44,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:44,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245610997] [2024-06-04 16:01:44,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245610997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:44,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:44,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:44,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003967018] [2024-06-04 16:01:44,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:44,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:44,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:44,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:44,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:44,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:44,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 179 transitions, 1928 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:44,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:44,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:44,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:44,844 INFO L124 PetriNetUnfolderBase]: 1857/3173 cut-off events. [2024-06-04 16:01:44,844 INFO L125 PetriNetUnfolderBase]: For 62694/62697 co-relation queries the response was YES. [2024-06-04 16:01:44,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16506 conditions, 3173 events. 1857/3173 cut-off events. For 62694/62697 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19496 event pairs, 436 based on Foata normal form. 3/3174 useless extension candidates. Maximal degree in co-relation 16423. Up to 2913 conditions per place. [2024-06-04 16:01:44,868 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 171 selfloop transitions, 14 changer transitions 0/191 dead transitions. [2024-06-04 16:01:44,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 191 transitions, 2333 flow [2024-06-04 16:01:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:44,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-04 16:01:44,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:01:44,869 INFO L175 Difference]: Start difference. First operand has 165 places, 179 transitions, 1928 flow. Second operand 4 states and 97 transitions. [2024-06-04 16:01:44,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 191 transitions, 2333 flow [2024-06-04 16:01:44,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 191 transitions, 2253 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:44,952 INFO L231 Difference]: Finished difference. Result has 165 places, 179 transitions, 1886 flow [2024-06-04 16:01:44,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1886, PETRI_PLACES=165, PETRI_TRANSITIONS=179} [2024-06-04 16:01:44,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-04 16:01:44,953 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 179 transitions, 1886 flow [2024-06-04 16:01:44,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:44,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:44,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:44,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:01:44,953 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:44,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:44,954 INFO L85 PathProgramCache]: Analyzing trace with hash -133432892, now seen corresponding path program 1 times [2024-06-04 16:01:44,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:44,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132532712] [2024-06-04 16:01:44,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:44,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:45,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:45,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132532712] [2024-06-04 16:01:45,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132532712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:45,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:45,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:45,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089847963] [2024-06-04 16:01:45,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:45,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:45,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:45,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:45,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:45,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:45,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 179 transitions, 1886 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:45,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:45,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:45,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:45,679 INFO L124 PetriNetUnfolderBase]: 1798/3083 cut-off events. [2024-06-04 16:01:45,679 INFO L125 PetriNetUnfolderBase]: For 69042/69069 co-relation queries the response was YES. [2024-06-04 16:01:45,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16068 conditions, 3083 events. 1798/3083 cut-off events. For 69042/69069 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19028 event pairs, 426 based on Foata normal form. 34/3085 useless extension candidates. Maximal degree in co-relation 15985. Up to 2731 conditions per place. [2024-06-04 16:01:45,706 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 148 selfloop transitions, 29 changer transitions 0/192 dead transitions. [2024-06-04 16:01:45,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 192 transitions, 2298 flow [2024-06-04 16:01:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-04 16:01:45,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-04 16:01:45,707 INFO L175 Difference]: Start difference. First operand has 165 places, 179 transitions, 1886 flow. Second operand 5 states and 117 transitions. [2024-06-04 16:01:45,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 192 transitions, 2298 flow [2024-06-04 16:01:45,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 192 transitions, 2270 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:45,799 INFO L231 Difference]: Finished difference. Result has 167 places, 182 transitions, 1963 flow [2024-06-04 16:01:45,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1963, PETRI_PLACES=167, PETRI_TRANSITIONS=182} [2024-06-04 16:01:45,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-04 16:01:45,800 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 182 transitions, 1963 flow [2024-06-04 16:01:45,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:45,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:45,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:45,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:01:45,801 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:45,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:45,801 INFO L85 PathProgramCache]: Analyzing trace with hash -113007920, now seen corresponding path program 1 times [2024-06-04 16:01:45,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:45,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276990903] [2024-06-04 16:01:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:45,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:46,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:46,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276990903] [2024-06-04 16:01:46,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276990903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:46,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:46,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:46,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79907521] [2024-06-04 16:01:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:46,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:46,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:46,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:46,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:46,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:46,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 182 transitions, 1963 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:46,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:46,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:46,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:46,537 INFO L124 PetriNetUnfolderBase]: 1868/3171 cut-off events. [2024-06-04 16:01:46,537 INFO L125 PetriNetUnfolderBase]: For 67093/67102 co-relation queries the response was YES. [2024-06-04 16:01:46,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16787 conditions, 3171 events. 1868/3171 cut-off events. For 67093/67102 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19301 event pairs, 443 based on Foata normal form. 9/3178 useless extension candidates. Maximal degree in co-relation 16703. Up to 2897 conditions per place. [2024-06-04 16:01:46,560 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 179 selfloop transitions, 21 changer transitions 0/206 dead transitions. [2024-06-04 16:01:46,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 206 transitions, 2554 flow [2024-06-04 16:01:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-04 16:01:46,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:01:46,561 INFO L175 Difference]: Start difference. First operand has 167 places, 182 transitions, 1963 flow. Second operand 5 states and 120 transitions. [2024-06-04 16:01:46,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 206 transitions, 2554 flow [2024-06-04 16:01:46,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 206 transitions, 2469 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:46,663 INFO L231 Difference]: Finished difference. Result has 170 places, 186 transitions, 1976 flow [2024-06-04 16:01:46,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1976, PETRI_PLACES=170, PETRI_TRANSITIONS=186} [2024-06-04 16:01:46,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-04 16:01:46,663 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 186 transitions, 1976 flow [2024-06-04 16:01:46,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:46,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:46,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:46,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:01:46,664 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:46,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:46,664 INFO L85 PathProgramCache]: Analyzing trace with hash 526337320, now seen corresponding path program 2 times [2024-06-04 16:01:46,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:46,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536071732] [2024-06-04 16:01:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:46,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:46,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:46,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536071732] [2024-06-04 16:01:46,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536071732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:46,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:46,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:46,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501449155] [2024-06-04 16:01:46,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:46,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:46,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:46,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:46,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:47,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:47,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 186 transitions, 1976 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:47,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:47,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:47,357 INFO L124 PetriNetUnfolderBase]: 1865/3172 cut-off events. [2024-06-04 16:01:47,357 INFO L125 PetriNetUnfolderBase]: For 69102/69102 co-relation queries the response was YES. [2024-06-04 16:01:47,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16723 conditions, 3172 events. 1865/3172 cut-off events. For 69102/69102 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19443 event pairs, 446 based on Foata normal form. 1/3169 useless extension candidates. Maximal degree in co-relation 16637. Up to 2894 conditions per place. [2024-06-04 16:01:47,382 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 171 selfloop transitions, 23 changer transitions 0/200 dead transitions. [2024-06-04 16:01:47,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 200 transitions, 2434 flow [2024-06-04 16:01:47,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-04 16:01:47,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-04 16:01:47,383 INFO L175 Difference]: Start difference. First operand has 170 places, 186 transitions, 1976 flow. Second operand 5 states and 114 transitions. [2024-06-04 16:01:47,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 200 transitions, 2434 flow [2024-06-04 16:01:47,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 200 transitions, 2412 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:47,553 INFO L231 Difference]: Finished difference. Result has 175 places, 188 transitions, 2039 flow [2024-06-04 16:01:47,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2039, PETRI_PLACES=175, PETRI_TRANSITIONS=188} [2024-06-04 16:01:47,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-04 16:01:47,553 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 188 transitions, 2039 flow [2024-06-04 16:01:47,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:47,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:47,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:01:47,554 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:47,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:47,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1765685806, now seen corresponding path program 1 times [2024-06-04 16:01:47,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:47,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372900523] [2024-06-04 16:01:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:47,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:47,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:47,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372900523] [2024-06-04 16:01:47,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372900523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:47,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:47,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:47,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559120918] [2024-06-04 16:01:47,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:47,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:47,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:47,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:47,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:47,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 188 transitions, 2039 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:47,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:47,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:48,348 INFO L124 PetriNetUnfolderBase]: 1893/3224 cut-off events. [2024-06-04 16:01:48,349 INFO L125 PetriNetUnfolderBase]: For 75013/75025 co-relation queries the response was YES. [2024-06-04 16:01:48,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17185 conditions, 3224 events. 1893/3224 cut-off events. For 75013/75025 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19858 event pairs, 440 based on Foata normal form. 12/3231 useless extension candidates. Maximal degree in co-relation 17096. Up to 2811 conditions per place. [2024-06-04 16:01:48,377 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 49 changer transitions 0/219 dead transitions. [2024-06-04 16:01:48,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 219 transitions, 2827 flow [2024-06-04 16:01:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-04 16:01:48,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-04 16:01:48,378 INFO L175 Difference]: Start difference. First operand has 175 places, 188 transitions, 2039 flow. Second operand 8 states and 175 transitions. [2024-06-04 16:01:48,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 219 transitions, 2827 flow [2024-06-04 16:01:48,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 219 transitions, 2796 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:48,522 INFO L231 Difference]: Finished difference. Result has 182 places, 199 transitions, 2262 flow [2024-06-04 16:01:48,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2262, PETRI_PLACES=182, PETRI_TRANSITIONS=199} [2024-06-04 16:01:48,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-04 16:01:48,522 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 199 transitions, 2262 flow [2024-06-04 16:01:48,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:48,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:48,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:48,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:01:48,523 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:48,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:48,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1679483358, now seen corresponding path program 2 times [2024-06-04 16:01:48,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:48,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591609952] [2024-06-04 16:01:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:48,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:48,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:48,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591609952] [2024-06-04 16:01:48,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591609952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:48,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:48,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:48,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256605047] [2024-06-04 16:01:48,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:48,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:48,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:48,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:48,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:48,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:48,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 199 transitions, 2262 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:48,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:48,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:48,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:49,342 INFO L124 PetriNetUnfolderBase]: 1911/3253 cut-off events. [2024-06-04 16:01:49,343 INFO L125 PetriNetUnfolderBase]: For 81073/81085 co-relation queries the response was YES. [2024-06-04 16:01:49,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17965 conditions, 3253 events. 1911/3253 cut-off events. For 81073/81085 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20081 event pairs, 452 based on Foata normal form. 12/3260 useless extension candidates. Maximal degree in co-relation 17873. Up to 2854 conditions per place. [2024-06-04 16:01:49,372 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 165 selfloop transitions, 53 changer transitions 0/224 dead transitions. [2024-06-04 16:01:49,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 224 transitions, 3022 flow [2024-06-04 16:01:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:49,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-04 16:01:49,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-04 16:01:49,373 INFO L175 Difference]: Start difference. First operand has 182 places, 199 transitions, 2262 flow. Second operand 7 states and 158 transitions. [2024-06-04 16:01:49,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 224 transitions, 3022 flow [2024-06-04 16:01:49,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 224 transitions, 2878 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:49,527 INFO L231 Difference]: Finished difference. Result has 186 places, 208 transitions, 2386 flow [2024-06-04 16:01:49,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2146, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2386, PETRI_PLACES=186, PETRI_TRANSITIONS=208} [2024-06-04 16:01:49,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-04 16:01:49,527 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 208 transitions, 2386 flow [2024-06-04 16:01:49,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:49,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:49,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:49,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:01:49,528 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:49,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:49,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1985409868, now seen corresponding path program 3 times [2024-06-04 16:01:49,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:49,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928804557] [2024-06-04 16:01:49,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:49,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:49,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:49,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928804557] [2024-06-04 16:01:49,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928804557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:49,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:49,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:49,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144737219] [2024-06-04 16:01:49,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:49,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:49,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:49,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:49,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:49,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 208 transitions, 2386 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:49,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:49,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:49,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:50,308 INFO L124 PetriNetUnfolderBase]: 1907/3249 cut-off events. [2024-06-04 16:01:50,308 INFO L125 PetriNetUnfolderBase]: For 83169/83181 co-relation queries the response was YES. [2024-06-04 16:01:50,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17993 conditions, 3249 events. 1907/3249 cut-off events. For 83169/83181 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20062 event pairs, 456 based on Foata normal form. 12/3256 useless extension candidates. Maximal degree in co-relation 17900. Up to 2852 conditions per place. [2024-06-04 16:01:50,335 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 45 changer transitions 0/221 dead transitions. [2024-06-04 16:01:50,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 221 transitions, 2930 flow [2024-06-04 16:01:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-04 16:01:50,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:01:50,336 INFO L175 Difference]: Start difference. First operand has 186 places, 208 transitions, 2386 flow. Second operand 5 states and 120 transitions. [2024-06-04 16:01:50,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 221 transitions, 2930 flow [2024-06-04 16:01:50,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 221 transitions, 2816 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:50,497 INFO L231 Difference]: Finished difference. Result has 188 places, 208 transitions, 2370 flow [2024-06-04 16:01:50,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2370, PETRI_PLACES=188, PETRI_TRANSITIONS=208} [2024-06-04 16:01:50,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-04 16:01:50,498 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 208 transitions, 2370 flow [2024-06-04 16:01:50,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:50,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:50,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:50,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:01:50,498 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:50,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:50,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2095037611, now seen corresponding path program 1 times [2024-06-04 16:01:50,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:50,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281270159] [2024-06-04 16:01:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:50,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:50,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:50,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281270159] [2024-06-04 16:01:50,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281270159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:50,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:50,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:50,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215965921] [2024-06-04 16:01:50,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:50,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:50,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:50,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:50,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:50,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:50,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 208 transitions, 2370 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:50,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:50,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:50,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:51,306 INFO L124 PetriNetUnfolderBase]: 1925/3273 cut-off events. [2024-06-04 16:01:51,306 INFO L125 PetriNetUnfolderBase]: For 86171/86171 co-relation queries the response was YES. [2024-06-04 16:01:51,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18308 conditions, 3273 events. 1925/3273 cut-off events. For 86171/86171 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20164 event pairs, 430 based on Foata normal form. 1/3270 useless extension candidates. Maximal degree in co-relation 18214. Up to 2951 conditions per place. [2024-06-04 16:01:51,338 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 206 selfloop transitions, 32 changer transitions 0/244 dead transitions. [2024-06-04 16:01:51,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 244 transitions, 3119 flow [2024-06-04 16:01:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-04 16:01:51,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-04 16:01:51,339 INFO L175 Difference]: Start difference. First operand has 188 places, 208 transitions, 2370 flow. Second operand 9 states and 193 transitions. [2024-06-04 16:01:51,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 244 transitions, 3119 flow [2024-06-04 16:01:51,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 244 transitions, 3019 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:51,499 INFO L231 Difference]: Finished difference. Result has 195 places, 217 transitions, 2482 flow [2024-06-04 16:01:51,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2482, PETRI_PLACES=195, PETRI_TRANSITIONS=217} [2024-06-04 16:01:51,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-04 16:01:51,500 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 217 transitions, 2482 flow [2024-06-04 16:01:51,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:51,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:51,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:51,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:01:51,501 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:51,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1654405773, now seen corresponding path program 2 times [2024-06-04 16:01:51,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:51,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287196812] [2024-06-04 16:01:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:51,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:51,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:51,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287196812] [2024-06-04 16:01:51,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287196812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:51,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:51,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:51,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184162158] [2024-06-04 16:01:51,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:51,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:51,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:51,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:51,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:51,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:51,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 217 transitions, 2482 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:51,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:51,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:51,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:52,360 INFO L124 PetriNetUnfolderBase]: 1932/3284 cut-off events. [2024-06-04 16:01:52,361 INFO L125 PetriNetUnfolderBase]: For 90539/90542 co-relation queries the response was YES. [2024-06-04 16:01:52,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18423 conditions, 3284 events. 1932/3284 cut-off events. For 90539/90542 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20240 event pairs, 434 based on Foata normal form. 5/3285 useless extension candidates. Maximal degree in co-relation 18326. Up to 2936 conditions per place. [2024-06-04 16:01:52,392 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 192 selfloop transitions, 45 changer transitions 0/243 dead transitions. [2024-06-04 16:01:52,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 243 transitions, 3065 flow [2024-06-04 16:01:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:01:52,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 16:01:52,393 INFO L175 Difference]: Start difference. First operand has 195 places, 217 transitions, 2482 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:01:52,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 243 transitions, 3065 flow [2024-06-04 16:01:52,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 243 transitions, 2973 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:52,579 INFO L231 Difference]: Finished difference. Result has 196 places, 221 transitions, 2556 flow [2024-06-04 16:01:52,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2556, PETRI_PLACES=196, PETRI_TRANSITIONS=221} [2024-06-04 16:01:52,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-04 16:01:52,580 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 221 transitions, 2556 flow [2024-06-04 16:01:52,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:52,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:52,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:52,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:01:52,580 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:52,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash 397471787, now seen corresponding path program 3 times [2024-06-04 16:01:52,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:52,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667452378] [2024-06-04 16:01:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:52,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:52,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:52,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667452378] [2024-06-04 16:01:52,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667452378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:52,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:52,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:52,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620401681] [2024-06-04 16:01:52,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:52,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:52,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:52,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:52,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:52,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:52,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 221 transitions, 2556 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:52,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:52,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:52,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:53,448 INFO L124 PetriNetUnfolderBase]: 1961/3332 cut-off events. [2024-06-04 16:01:53,448 INFO L125 PetriNetUnfolderBase]: For 96454/96466 co-relation queries the response was YES. [2024-06-04 16:01:53,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18996 conditions, 3332 events. 1961/3332 cut-off events. For 96454/96466 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20572 event pairs, 441 based on Foata normal form. 11/3338 useless extension candidates. Maximal degree in co-relation 18898. Up to 2873 conditions per place. [2024-06-04 16:01:53,479 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 77 changer transitions 0/253 dead transitions. [2024-06-04 16:01:53,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 253 transitions, 3430 flow [2024-06-04 16:01:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-04 16:01:53,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-04 16:01:53,481 INFO L175 Difference]: Start difference. First operand has 196 places, 221 transitions, 2556 flow. Second operand 9 states and 193 transitions. [2024-06-04 16:01:53,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 253 transitions, 3430 flow [2024-06-04 16:01:53,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 253 transitions, 3321 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:53,667 INFO L231 Difference]: Finished difference. Result has 202 places, 231 transitions, 2769 flow [2024-06-04 16:01:53,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2769, PETRI_PLACES=202, PETRI_TRANSITIONS=231} [2024-06-04 16:01:53,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-04 16:01:53,668 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 231 transitions, 2769 flow [2024-06-04 16:01:53,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:53,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:53,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:53,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:01:53,669 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:53,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:53,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2059874673, now seen corresponding path program 4 times [2024-06-04 16:01:53,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:53,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651552088] [2024-06-04 16:01:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:53,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:54,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:54,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651552088] [2024-06-04 16:01:54,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651552088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:54,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:54,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:54,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681333318] [2024-06-04 16:01:54,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:54,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:54,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:54,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:54,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:54,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:54,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 231 transitions, 2769 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:54,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:54,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:54,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:54,495 INFO L124 PetriNetUnfolderBase]: 1955/3324 cut-off events. [2024-06-04 16:01:54,495 INFO L125 PetriNetUnfolderBase]: For 99213/99225 co-relation queries the response was YES. [2024-06-04 16:01:54,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19053 conditions, 3324 events. 1955/3324 cut-off events. For 99213/99225 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20527 event pairs, 441 based on Foata normal form. 12/3331 useless extension candidates. Maximal degree in co-relation 18953. Up to 2868 conditions per place. [2024-06-04 16:01:54,527 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 172 selfloop transitions, 71 changer transitions 0/249 dead transitions. [2024-06-04 16:01:54,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 249 transitions, 3484 flow [2024-06-04 16:01:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:54,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-04 16:01:54,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-04 16:01:54,528 INFO L175 Difference]: Start difference. First operand has 202 places, 231 transitions, 2769 flow. Second operand 8 states and 175 transitions. [2024-06-04 16:01:54,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 249 transitions, 3484 flow [2024-06-04 16:01:54,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 249 transitions, 3352 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:54,709 INFO L231 Difference]: Finished difference. Result has 205 places, 231 transitions, 2787 flow [2024-06-04 16:01:54,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2637, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2787, PETRI_PLACES=205, PETRI_TRANSITIONS=231} [2024-06-04 16:01:54,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-04 16:01:54,710 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 231 transitions, 2787 flow [2024-06-04 16:01:54,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:54,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:54,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:54,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:01:54,710 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:54,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:54,710 INFO L85 PathProgramCache]: Analyzing trace with hash 560556237, now seen corresponding path program 5 times [2024-06-04 16:01:54,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:54,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602235120] [2024-06-04 16:01:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:54,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:55,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:55,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602235120] [2024-06-04 16:01:55,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602235120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:55,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:55,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:55,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642477362] [2024-06-04 16:01:55,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:55,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:55,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:55,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:55,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:55,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 231 transitions, 2787 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:55,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:55,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:55,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:55,538 INFO L124 PetriNetUnfolderBase]: 1950/3311 cut-off events. [2024-06-04 16:01:55,538 INFO L125 PetriNetUnfolderBase]: For 100494/100494 co-relation queries the response was YES. [2024-06-04 16:01:55,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19036 conditions, 3311 events. 1950/3311 cut-off events. For 100494/100494 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20382 event pairs, 430 based on Foata normal form. 1/3308 useless extension candidates. Maximal degree in co-relation 18935. Up to 2863 conditions per place. [2024-06-04 16:01:55,569 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 161 selfloop transitions, 89 changer transitions 0/256 dead transitions. [2024-06-04 16:01:55,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 256 transitions, 3538 flow [2024-06-04 16:01:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:55,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 16:01:55,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-04 16:01:55,570 INFO L175 Difference]: Start difference. First operand has 205 places, 231 transitions, 2787 flow. Second operand 9 states and 199 transitions. [2024-06-04 16:01:55,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 256 transitions, 3538 flow [2024-06-04 16:01:55,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 256 transitions, 3381 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:55,794 INFO L231 Difference]: Finished difference. Result has 209 places, 231 transitions, 2818 flow [2024-06-04 16:01:55,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2818, PETRI_PLACES=209, PETRI_TRANSITIONS=231} [2024-06-04 16:01:55,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-04 16:01:55,794 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 231 transitions, 2818 flow [2024-06-04 16:01:55,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:55,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:55,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:55,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:01:55,795 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:55,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:55,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2012761309, now seen corresponding path program 6 times [2024-06-04 16:01:55,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:55,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229249501] [2024-06-04 16:01:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:55,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:56,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:56,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229249501] [2024-06-04 16:01:56,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229249501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:56,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:56,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:56,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209111536] [2024-06-04 16:01:56,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:56,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:56,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:56,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:56,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:56,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:56,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 231 transitions, 2818 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:56,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:56,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:56,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:56,658 INFO L124 PetriNetUnfolderBase]: 1944/3302 cut-off events. [2024-06-04 16:01:56,659 INFO L125 PetriNetUnfolderBase]: For 102947/102950 co-relation queries the response was YES. [2024-06-04 16:01:56,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18984 conditions, 3302 events. 1944/3302 cut-off events. For 102947/102950 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20337 event pairs, 434 based on Foata normal form. 4/3302 useless extension candidates. Maximal degree in co-relation 18882. Up to 2938 conditions per place. [2024-06-04 16:01:56,691 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 193 selfloop transitions, 50 changer transitions 0/249 dead transitions. [2024-06-04 16:01:56,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 249 transitions, 3350 flow [2024-06-04 16:01:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 16:01:56,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-04 16:01:56,692 INFO L175 Difference]: Start difference. First operand has 209 places, 231 transitions, 2818 flow. Second operand 5 states and 126 transitions. [2024-06-04 16:01:56,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 249 transitions, 3350 flow [2024-06-04 16:01:56,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 249 transitions, 3112 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-04 16:01:56,937 INFO L231 Difference]: Finished difference. Result has 205 places, 231 transitions, 2704 flow [2024-06-04 16:01:56,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2704, PETRI_PLACES=205, PETRI_TRANSITIONS=231} [2024-06-04 16:01:56,938 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-04 16:01:56,938 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 231 transitions, 2704 flow [2024-06-04 16:01:56,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:56,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:56,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:56,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:01:56,938 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:56,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:56,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1418176533, now seen corresponding path program 7 times [2024-06-04 16:01:56,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:56,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871207431] [2024-06-04 16:01:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:56,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:57,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:57,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871207431] [2024-06-04 16:01:57,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871207431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:57,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:57,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:57,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416517729] [2024-06-04 16:01:57,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:57,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:57,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:57,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:57,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:57,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:57,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 231 transitions, 2704 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:57,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:57,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:57,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:57,857 INFO L124 PetriNetUnfolderBase]: 1936/3296 cut-off events. [2024-06-04 16:01:57,858 INFO L125 PetriNetUnfolderBase]: For 101410/101422 co-relation queries the response was YES. [2024-06-04 16:01:57,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18688 conditions, 3296 events. 1936/3296 cut-off events. For 101410/101422 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20376 event pairs, 456 based on Foata normal form. 12/3303 useless extension candidates. Maximal degree in co-relation 18586. Up to 2880 conditions per place. [2024-06-04 16:01:57,887 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 183 selfloop transitions, 57 changer transitions 0/246 dead transitions. [2024-06-04 16:01:57,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 246 transitions, 3222 flow [2024-06-04 16:01:57,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:57,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 16:01:57,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:01:57,888 INFO L175 Difference]: Start difference. First operand has 205 places, 231 transitions, 2704 flow. Second operand 5 states and 123 transitions. [2024-06-04 16:01:57,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 246 transitions, 3222 flow [2024-06-04 16:01:58,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 246 transitions, 3088 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:58,101 INFO L231 Difference]: Finished difference. Result has 205 places, 231 transitions, 2697 flow [2024-06-04 16:01:58,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2697, PETRI_PLACES=205, PETRI_TRANSITIONS=231} [2024-06-04 16:01:58,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-04 16:01:58,101 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 231 transitions, 2697 flow [2024-06-04 16:01:58,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:58,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:58,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:58,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:01:58,102 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:58,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:58,102 INFO L85 PathProgramCache]: Analyzing trace with hash 605745827, now seen corresponding path program 1 times [2024-06-04 16:01:58,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:58,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766264224] [2024-06-04 16:01:58,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:58,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:58,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:58,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766264224] [2024-06-04 16:01:58,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766264224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:58,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:58,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:58,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420180955] [2024-06-04 16:01:58,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:58,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:58,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:58,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:58,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 231 transitions, 2697 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:58,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:58,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:58,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:58,890 INFO L124 PetriNetUnfolderBase]: 1891/3232 cut-off events. [2024-06-04 16:01:58,890 INFO L125 PetriNetUnfolderBase]: For 103458/103461 co-relation queries the response was YES. [2024-06-04 16:01:58,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18444 conditions, 3232 events. 1891/3232 cut-off events. For 103458/103461 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20106 event pairs, 412 based on Foata normal form. 7/3210 useless extension candidates. Maximal degree in co-relation 18342. Up to 2860 conditions per place. [2024-06-04 16:01:58,919 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 197 selfloop transitions, 35 changer transitions 0/249 dead transitions. [2024-06-04 16:01:58,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 249 transitions, 3229 flow [2024-06-04 16:01:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 16:01:58,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:01:58,920 INFO L175 Difference]: Start difference. First operand has 205 places, 231 transitions, 2697 flow. Second operand 5 states and 123 transitions. [2024-06-04 16:01:58,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 249 transitions, 3229 flow [2024-06-04 16:01:59,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 249 transitions, 3081 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:59,135 INFO L231 Difference]: Finished difference. Result has 205 places, 233 transitions, 2658 flow [2024-06-04 16:01:59,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2549, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2658, PETRI_PLACES=205, PETRI_TRANSITIONS=233} [2024-06-04 16:01:59,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-04 16:01:59,136 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 233 transitions, 2658 flow [2024-06-04 16:01:59,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:59,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:59,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:59,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:01:59,136 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:59,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:59,137 INFO L85 PathProgramCache]: Analyzing trace with hash 620030627, now seen corresponding path program 2 times [2024-06-04 16:01:59,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:59,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097983944] [2024-06-04 16:01:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:59,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:59,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:59,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097983944] [2024-06-04 16:01:59,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097983944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:59,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:59,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:59,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854904390] [2024-06-04 16:01:59,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:59,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:59,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:59,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:59,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:59,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:59,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 233 transitions, 2658 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:59,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:59,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:59,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:59,905 INFO L124 PetriNetUnfolderBase]: 1882/3219 cut-off events. [2024-06-04 16:01:59,905 INFO L125 PetriNetUnfolderBase]: For 96252/96267 co-relation queries the response was YES. [2024-06-04 16:01:59,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18059 conditions, 3219 events. 1882/3219 cut-off events. For 96252/96267 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20050 event pairs, 422 based on Foata normal form. 18/3202 useless extension candidates. Maximal degree in co-relation 17957. Up to 2808 conditions per place. [2024-06-04 16:01:59,935 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 199 selfloop transitions, 30 changer transitions 0/246 dead transitions. [2024-06-04 16:01:59,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 246 transitions, 3174 flow [2024-06-04 16:01:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-04 16:01:59,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-04 16:01:59,936 INFO L175 Difference]: Start difference. First operand has 205 places, 233 transitions, 2658 flow. Second operand 5 states and 116 transitions. [2024-06-04 16:01:59,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 246 transitions, 3174 flow [2024-06-04 16:02:00,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 246 transitions, 3085 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:00,150 INFO L231 Difference]: Finished difference. Result has 207 places, 235 transitions, 2670 flow [2024-06-04 16:02:00,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2670, PETRI_PLACES=207, PETRI_TRANSITIONS=235} [2024-06-04 16:02:00,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-04 16:02:00,151 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 235 transitions, 2670 flow [2024-06-04 16:02:00,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:00,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:00,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:00,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:02:00,152 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:00,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:00,152 INFO L85 PathProgramCache]: Analyzing trace with hash 144763211, now seen corresponding path program 1 times [2024-06-04 16:02:00,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:00,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172397214] [2024-06-04 16:02:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:00,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:00,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:00,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172397214] [2024-06-04 16:02:00,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172397214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:00,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:00,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:00,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006953327] [2024-06-04 16:02:00,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:00,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:00,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:00,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:00,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:00,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:00,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 235 transitions, 2670 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:00,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:00,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:00,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:01,004 INFO L124 PetriNetUnfolderBase]: 1950/3314 cut-off events. [2024-06-04 16:02:01,004 INFO L125 PetriNetUnfolderBase]: For 96457/96460 co-relation queries the response was YES. [2024-06-04 16:02:01,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18618 conditions, 3314 events. 1950/3314 cut-off events. For 96457/96460 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20426 event pairs, 395 based on Foata normal form. 4/3316 useless extension candidates. Maximal degree in co-relation 18515. Up to 3008 conditions per place. [2024-06-04 16:02:01,036 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 230 selfloop transitions, 25 changer transitions 0/261 dead transitions. [2024-06-04 16:02:01,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 261 transitions, 3405 flow [2024-06-04 16:02:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-04 16:02:01,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-04 16:02:01,038 INFO L175 Difference]: Start difference. First operand has 207 places, 235 transitions, 2670 flow. Second operand 8 states and 169 transitions. [2024-06-04 16:02:01,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 261 transitions, 3405 flow [2024-06-04 16:02:01,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 261 transitions, 3320 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:01,246 INFO L231 Difference]: Finished difference. Result has 212 places, 239 transitions, 2716 flow [2024-06-04 16:02:01,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2716, PETRI_PLACES=212, PETRI_TRANSITIONS=239} [2024-06-04 16:02:01,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-04 16:02:01,247 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 239 transitions, 2716 flow [2024-06-04 16:02:01,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:01,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:01,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:01,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:02:01,247 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:01,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:01,247 INFO L85 PathProgramCache]: Analyzing trace with hash 408908555, now seen corresponding path program 2 times [2024-06-04 16:02:01,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:01,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141375656] [2024-06-04 16:02:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:01,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:01,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141375656] [2024-06-04 16:02:01,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141375656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:01,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:01,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:01,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994553157] [2024-06-04 16:02:01,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:01,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:01,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:01,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:01,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:01,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 239 transitions, 2716 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:01,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:01,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:01,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:02,178 INFO L124 PetriNetUnfolderBase]: 1958/3326 cut-off events. [2024-06-04 16:02:02,178 INFO L125 PetriNetUnfolderBase]: For 100188/100191 co-relation queries the response was YES. [2024-06-04 16:02:02,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18735 conditions, 3326 events. 1958/3326 cut-off events. For 100188/100191 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20534 event pairs, 426 based on Foata normal form. 4/3328 useless extension candidates. Maximal degree in co-relation 18631. Up to 3051 conditions per place. [2024-06-04 16:02:02,204 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 231 selfloop transitions, 21 changer transitions 0/258 dead transitions. [2024-06-04 16:02:02,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 258 transitions, 3307 flow [2024-06-04 16:02:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:02,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:02,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-04 16:02:02,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 16:02:02,205 INFO L175 Difference]: Start difference. First operand has 212 places, 239 transitions, 2716 flow. Second operand 8 states and 164 transitions. [2024-06-04 16:02:02,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 258 transitions, 3307 flow [2024-06-04 16:02:02,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 258 transitions, 3224 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:02,415 INFO L231 Difference]: Finished difference. Result has 216 places, 241 transitions, 2724 flow [2024-06-04 16:02:02,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2724, PETRI_PLACES=216, PETRI_TRANSITIONS=241} [2024-06-04 16:02:02,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-04 16:02:02,416 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 241 transitions, 2724 flow [2024-06-04 16:02:02,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:02,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:02,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:02,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:02:02,417 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:02,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash 524199725, now seen corresponding path program 3 times [2024-06-04 16:02:02,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:02,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152526831] [2024-06-04 16:02:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:02,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:02,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:02,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152526831] [2024-06-04 16:02:02,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152526831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:02,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:02,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:02,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202666563] [2024-06-04 16:02:02,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:02,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:02,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:02,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:02,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:02,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 241 transitions, 2724 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:02,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:02,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:02,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:03,276 INFO L124 PetriNetUnfolderBase]: 1953/3319 cut-off events. [2024-06-04 16:02:03,276 INFO L125 PetriNetUnfolderBase]: For 101381/101384 co-relation queries the response was YES. [2024-06-04 16:02:03,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18610 conditions, 3319 events. 1953/3319 cut-off events. For 101381/101384 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20456 event pairs, 398 based on Foata normal form. 4/3321 useless extension candidates. Maximal degree in co-relation 18504. Up to 3029 conditions per place. [2024-06-04 16:02:03,305 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 232 selfloop transitions, 19 changer transitions 0/257 dead transitions. [2024-06-04 16:02:03,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 257 transitions, 3266 flow [2024-06-04 16:02:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-04 16:02:03,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-04 16:02:03,306 INFO L175 Difference]: Start difference. First operand has 216 places, 241 transitions, 2724 flow. Second operand 5 states and 118 transitions. [2024-06-04 16:02:03,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 257 transitions, 3266 flow [2024-06-04 16:02:03,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 257 transitions, 3193 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:03,562 INFO L231 Difference]: Finished difference. Result has 215 places, 241 transitions, 2697 flow [2024-06-04 16:02:03,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2651, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2697, PETRI_PLACES=215, PETRI_TRANSITIONS=241} [2024-06-04 16:02:03,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-04 16:02:03,562 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 241 transitions, 2697 flow [2024-06-04 16:02:03,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:03,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:03,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:03,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:02:03,563 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:03,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:03,563 INFO L85 PathProgramCache]: Analyzing trace with hash -626812721, now seen corresponding path program 1 times [2024-06-04 16:02:03,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:03,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679322833] [2024-06-04 16:02:03,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:03,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:03,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:03,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679322833] [2024-06-04 16:02:03,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679322833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:03,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:03,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:03,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565758121] [2024-06-04 16:02:03,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:03,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:03,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:03,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:03,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:03,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:03,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 241 transitions, 2697 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:03,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:03,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:03,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:04,397 INFO L124 PetriNetUnfolderBase]: 2006/3407 cut-off events. [2024-06-04 16:02:04,397 INFO L125 PetriNetUnfolderBase]: For 117978/117987 co-relation queries the response was YES. [2024-06-04 16:02:04,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19208 conditions, 3407 events. 2006/3407 cut-off events. For 117978/117987 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21020 event pairs, 365 based on Foata normal form. 14/3419 useless extension candidates. Maximal degree in co-relation 19101. Up to 2954 conditions per place. [2024-06-04 16:02:04,431 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 242 selfloop transitions, 26 changer transitions 0/274 dead transitions. [2024-06-04 16:02:04,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 274 transitions, 3482 flow [2024-06-04 16:02:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:02:04,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-04 16:02:04,432 INFO L175 Difference]: Start difference. First operand has 215 places, 241 transitions, 2697 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:02:04,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 274 transitions, 3482 flow [2024-06-04 16:02:04,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 274 transitions, 3437 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:04,685 INFO L231 Difference]: Finished difference. Result has 217 places, 243 transitions, 2722 flow [2024-06-04 16:02:04,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2722, PETRI_PLACES=217, PETRI_TRANSITIONS=243} [2024-06-04 16:02:04,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-04 16:02:04,685 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 243 transitions, 2722 flow [2024-06-04 16:02:04,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:04,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:04,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:04,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:02:04,686 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:04,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:04,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1226404785, now seen corresponding path program 2 times [2024-06-04 16:02:04,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:04,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121404309] [2024-06-04 16:02:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:04,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:05,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:05,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121404309] [2024-06-04 16:02:05,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121404309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:05,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:05,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:05,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107222388] [2024-06-04 16:02:05,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:05,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:05,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:05,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:05,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:05,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:05,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 243 transitions, 2722 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:05,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:05,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:05,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:05,550 INFO L124 PetriNetUnfolderBase]: 2034/3451 cut-off events. [2024-06-04 16:02:05,550 INFO L125 PetriNetUnfolderBase]: For 125442/125451 co-relation queries the response was YES. [2024-06-04 16:02:05,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19564 conditions, 3451 events. 2034/3451 cut-off events. For 125442/125451 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21442 event pairs, 456 based on Foata normal form. 16/3465 useless extension candidates. Maximal degree in co-relation 19456. Up to 3116 conditions per place. [2024-06-04 16:02:05,584 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 238 selfloop transitions, 23 changer transitions 0/267 dead transitions. [2024-06-04 16:02:05,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 267 transitions, 3346 flow [2024-06-04 16:02:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-04 16:02:05,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:02:05,585 INFO L175 Difference]: Start difference. First operand has 217 places, 243 transitions, 2722 flow. Second operand 6 states and 138 transitions. [2024-06-04 16:02:05,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 267 transitions, 3346 flow [2024-06-04 16:02:05,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 267 transitions, 3320 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:05,860 INFO L231 Difference]: Finished difference. Result has 221 places, 244 transitions, 2757 flow [2024-06-04 16:02:05,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2757, PETRI_PLACES=221, PETRI_TRANSITIONS=244} [2024-06-04 16:02:05,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-04 16:02:05,860 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 244 transitions, 2757 flow [2024-06-04 16:02:05,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:05,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:05,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:05,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:02:05,861 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:05,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:05,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1403890635, now seen corresponding path program 1 times [2024-06-04 16:02:05,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:05,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972636432] [2024-06-04 16:02:05,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:05,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:06,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:06,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972636432] [2024-06-04 16:02:06,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972636432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:06,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:06,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:06,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191535007] [2024-06-04 16:02:06,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:06,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:06,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:06,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:06,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:06,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:06,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 244 transitions, 2757 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:06,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:06,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:06,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:06,880 INFO L124 PetriNetUnfolderBase]: 2100/3555 cut-off events. [2024-06-04 16:02:06,880 INFO L125 PetriNetUnfolderBase]: For 123368/123368 co-relation queries the response was YES. [2024-06-04 16:02:06,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20515 conditions, 3555 events. 2100/3555 cut-off events. For 123368/123368 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22142 event pairs, 449 based on Foata normal form. 1/3552 useless extension candidates. Maximal degree in co-relation 20405. Up to 3040 conditions per place. [2024-06-04 16:02:06,914 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 218 selfloop transitions, 93 changer transitions 0/317 dead transitions. [2024-06-04 16:02:06,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 317 transitions, 4150 flow [2024-06-04 16:02:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:02:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:02:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-04 16:02:06,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223577235772358 [2024-06-04 16:02:06,915 INFO L175 Difference]: Start difference. First operand has 221 places, 244 transitions, 2757 flow. Second operand 12 states and 257 transitions. [2024-06-04 16:02:06,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 317 transitions, 4150 flow [2024-06-04 16:02:07,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 317 transitions, 4093 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:07,189 INFO L231 Difference]: Finished difference. Result has 232 places, 275 transitions, 3406 flow [2024-06-04 16:02:07,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2712, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3406, PETRI_PLACES=232, PETRI_TRANSITIONS=275} [2024-06-04 16:02:07,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-04 16:02:07,191 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 275 transitions, 3406 flow [2024-06-04 16:02:07,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:07,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:07,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:07,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 16:02:07,192 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:07,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash -538154891, now seen corresponding path program 2 times [2024-06-04 16:02:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:07,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283291355] [2024-06-04 16:02:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:07,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:07,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:07,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283291355] [2024-06-04 16:02:07,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283291355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:07,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:07,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:07,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834249223] [2024-06-04 16:02:07,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:07,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:07,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:07,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:07,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 275 transitions, 3406 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:07,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:07,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:07,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:08,168 INFO L124 PetriNetUnfolderBase]: 2107/3565 cut-off events. [2024-06-04 16:02:08,168 INFO L125 PetriNetUnfolderBase]: For 131485/131488 co-relation queries the response was YES. [2024-06-04 16:02:08,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21314 conditions, 3565 events. 2107/3565 cut-off events. For 131485/131488 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22188 event pairs, 455 based on Foata normal form. 5/3563 useless extension candidates. Maximal degree in co-relation 21200. Up to 3069 conditions per place. [2024-06-04 16:02:08,206 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 212 selfloop transitions, 91 changer transitions 0/309 dead transitions. [2024-06-04 16:02:08,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 309 transitions, 4252 flow [2024-06-04 16:02:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:02:08,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-04 16:02:08,207 INFO L175 Difference]: Start difference. First operand has 232 places, 275 transitions, 3406 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:02:08,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 309 transitions, 4252 flow [2024-06-04 16:02:08,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 309 transitions, 4085 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:08,591 INFO L231 Difference]: Finished difference. Result has 234 places, 279 transitions, 3502 flow [2024-06-04 16:02:08,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3502, PETRI_PLACES=234, PETRI_TRANSITIONS=279} [2024-06-04 16:02:08,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-04 16:02:08,591 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 279 transitions, 3502 flow [2024-06-04 16:02:08,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:08,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:08,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:08,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 16:02:08,592 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:08,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash 645873275, now seen corresponding path program 1 times [2024-06-04 16:02:08,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:08,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249807252] [2024-06-04 16:02:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:08,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:08,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:08,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249807252] [2024-06-04 16:02:08,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249807252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:08,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:08,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:08,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805707171] [2024-06-04 16:02:08,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:08,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:08,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:08,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:08,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:08,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:08,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 279 transitions, 3502 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:08,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:08,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:08,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:09,484 INFO L124 PetriNetUnfolderBase]: 2112/3581 cut-off events. [2024-06-04 16:02:09,484 INFO L125 PetriNetUnfolderBase]: For 134389/134401 co-relation queries the response was YES. [2024-06-04 16:02:09,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22031 conditions, 3581 events. 2112/3581 cut-off events. For 134389/134401 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22374 event pairs, 477 based on Foata normal form. 11/3587 useless extension candidates. Maximal degree in co-relation 21915. Up to 3093 conditions per place. [2024-06-04 16:02:09,522 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 228 selfloop transitions, 69 changer transitions 0/303 dead transitions. [2024-06-04 16:02:09,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 303 transitions, 4401 flow [2024-06-04 16:02:09,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:02:09,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-04 16:02:09,525 INFO L175 Difference]: Start difference. First operand has 234 places, 279 transitions, 3502 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:02:09,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 303 transitions, 4401 flow [2024-06-04 16:02:09,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 303 transitions, 4176 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:09,876 INFO L231 Difference]: Finished difference. Result has 234 places, 282 transitions, 3463 flow [2024-06-04 16:02:09,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3463, PETRI_PLACES=234, PETRI_TRANSITIONS=282} [2024-06-04 16:02:09,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-04 16:02:09,876 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 282 transitions, 3463 flow [2024-06-04 16:02:09,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:09,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:09,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:09,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 16:02:09,877 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:09,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:09,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1226401809, now seen corresponding path program 2 times [2024-06-04 16:02:09,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:09,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077428953] [2024-06-04 16:02:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:09,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:10,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:10,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077428953] [2024-06-04 16:02:10,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077428953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:10,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:10,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:10,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777619263] [2024-06-04 16:02:10,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:10,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:10,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:10,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:10,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:10,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:10,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 282 transitions, 3463 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:10,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:10,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:10,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:10,743 INFO L124 PetriNetUnfolderBase]: 2125/3601 cut-off events. [2024-06-04 16:02:10,743 INFO L125 PetriNetUnfolderBase]: For 135567/135579 co-relation queries the response was YES. [2024-06-04 16:02:10,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22086 conditions, 3601 events. 2125/3601 cut-off events. For 135567/135579 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22518 event pairs, 477 based on Foata normal form. 11/3607 useless extension candidates. Maximal degree in co-relation 21970. Up to 3108 conditions per place. [2024-06-04 16:02:10,781 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 223 selfloop transitions, 77 changer transitions 0/306 dead transitions. [2024-06-04 16:02:10,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 306 transitions, 4393 flow [2024-06-04 16:02:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 16:02:10,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 16:02:10,782 INFO L175 Difference]: Start difference. First operand has 234 places, 282 transitions, 3463 flow. Second operand 6 states and 141 transitions. [2024-06-04 16:02:10,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 306 transitions, 4393 flow [2024-06-04 16:02:11,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 306 transitions, 4204 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:11,107 INFO L231 Difference]: Finished difference. Result has 236 places, 288 transitions, 3504 flow [2024-06-04 16:02:11,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3504, PETRI_PLACES=236, PETRI_TRANSITIONS=288} [2024-06-04 16:02:11,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-04 16:02:11,108 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 288 transitions, 3504 flow [2024-06-04 16:02:11,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:11,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:11,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:11,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 16:02:11,108 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:11,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:11,109 INFO L85 PathProgramCache]: Analyzing trace with hash -995952473, now seen corresponding path program 3 times [2024-06-04 16:02:11,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:11,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263752008] [2024-06-04 16:02:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:11,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:11,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:11,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263752008] [2024-06-04 16:02:11,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263752008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:11,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:11,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:11,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5752251] [2024-06-04 16:02:11,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:11,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:11,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:11,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:11,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:11,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:11,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 288 transitions, 3504 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:11,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:11,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:11,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:11,995 INFO L124 PetriNetUnfolderBase]: 2107/3569 cut-off events. [2024-06-04 16:02:11,995 INFO L125 PetriNetUnfolderBase]: For 137982/137982 co-relation queries the response was YES. [2024-06-04 16:02:12,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21559 conditions, 3569 events. 2107/3569 cut-off events. For 137982/137982 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22248 event pairs, 455 based on Foata normal form. 8/3573 useless extension candidates. Maximal degree in co-relation 21443. Up to 3209 conditions per place. [2024-06-04 16:02:12,026 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 271 selfloop transitions, 28 changer transitions 0/305 dead transitions. [2024-06-04 16:02:12,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 305 transitions, 4191 flow [2024-06-04 16:02:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:12,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-04 16:02:12,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-04 16:02:12,027 INFO L175 Difference]: Start difference. First operand has 236 places, 288 transitions, 3504 flow. Second operand 6 states and 133 transitions. [2024-06-04 16:02:12,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 305 transitions, 4191 flow [2024-06-04 16:02:12,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 305 transitions, 4107 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:12,371 INFO L231 Difference]: Finished difference. Result has 240 places, 288 transitions, 3481 flow [2024-06-04 16:02:12,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3481, PETRI_PLACES=240, PETRI_TRANSITIONS=288} [2024-06-04 16:02:12,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-04 16:02:12,371 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 288 transitions, 3481 flow [2024-06-04 16:02:12,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:12,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:12,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:12,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 16:02:12,372 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:12,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:12,372 INFO L85 PathProgramCache]: Analyzing trace with hash 248924197, now seen corresponding path program 3 times [2024-06-04 16:02:12,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:12,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279319551] [2024-06-04 16:02:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:12,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:12,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:12,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279319551] [2024-06-04 16:02:12,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279319551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:12,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:12,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:12,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436473385] [2024-06-04 16:02:12,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:12,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:12,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:12,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:12,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:12,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:12,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 288 transitions, 3481 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:12,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:12,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:12,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:13,347 INFO L124 PetriNetUnfolderBase]: 2128/3601 cut-off events. [2024-06-04 16:02:13,347 INFO L125 PetriNetUnfolderBase]: For 133937/133937 co-relation queries the response was YES. [2024-06-04 16:02:13,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21852 conditions, 3601 events. 2128/3601 cut-off events. For 133937/133937 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22432 event pairs, 440 based on Foata normal form. 1/3598 useless extension candidates. Maximal degree in co-relation 21735. Up to 3180 conditions per place. [2024-06-04 16:02:13,391 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 259 selfloop transitions, 68 changer transitions 0/333 dead transitions. [2024-06-04 16:02:13,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 333 transitions, 4603 flow [2024-06-04 16:02:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-04 16:02:13,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-04 16:02:13,392 INFO L175 Difference]: Start difference. First operand has 240 places, 288 transitions, 3481 flow. Second operand 10 states and 221 transitions. [2024-06-04 16:02:13,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 333 transitions, 4603 flow [2024-06-04 16:02:13,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 333 transitions, 4529 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:13,733 INFO L231 Difference]: Finished difference. Result has 247 places, 299 transitions, 3721 flow [2024-06-04 16:02:13,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3411, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3721, PETRI_PLACES=247, PETRI_TRANSITIONS=299} [2024-06-04 16:02:13,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-04 16:02:13,733 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 299 transitions, 3721 flow [2024-06-04 16:02:13,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:13,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:13,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:13,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 16:02:13,734 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:13,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:13,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1619906427, now seen corresponding path program 4 times [2024-06-04 16:02:13,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:13,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478905665] [2024-06-04 16:02:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:13,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:14,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:14,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478905665] [2024-06-04 16:02:14,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478905665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:14,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:14,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:14,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60892819] [2024-06-04 16:02:14,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:14,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:14,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:14,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:14,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:14,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:14,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 299 transitions, 3721 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:14,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:14,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:14,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:14,728 INFO L124 PetriNetUnfolderBase]: 2135/3614 cut-off events. [2024-06-04 16:02:14,728 INFO L125 PetriNetUnfolderBase]: For 140090/140093 co-relation queries the response was YES. [2024-06-04 16:02:14,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22106 conditions, 3614 events. 2135/3614 cut-off events. For 140090/140093 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22556 event pairs, 444 based on Foata normal form. 5/3615 useless extension candidates. Maximal degree in co-relation 21986. Up to 3203 conditions per place. [2024-06-04 16:02:14,770 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 262 selfloop transitions, 61 changer transitions 0/329 dead transitions. [2024-06-04 16:02:14,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 329 transitions, 4499 flow [2024-06-04 16:02:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:02:14,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 16:02:14,771 INFO L175 Difference]: Start difference. First operand has 247 places, 299 transitions, 3721 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:02:14,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 329 transitions, 4499 flow [2024-06-04 16:02:15,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 329 transitions, 4380 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:15,262 INFO L231 Difference]: Finished difference. Result has 249 places, 303 transitions, 3813 flow [2024-06-04 16:02:15,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3813, PETRI_PLACES=249, PETRI_TRANSITIONS=303} [2024-06-04 16:02:15,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-04 16:02:15,263 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 303 transitions, 3813 flow [2024-06-04 16:02:15,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:15,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:15,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:15,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 16:02:15,263 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:15,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:15,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1259095731, now seen corresponding path program 3 times [2024-06-04 16:02:15,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:15,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441878632] [2024-06-04 16:02:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:15,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:15,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:15,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441878632] [2024-06-04 16:02:15,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441878632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:15,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:15,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:15,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652223814] [2024-06-04 16:02:15,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:15,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:15,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:15,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:15,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:15,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 303 transitions, 3813 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:15,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:15,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:15,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:16,193 INFO L124 PetriNetUnfolderBase]: 2132/3616 cut-off events. [2024-06-04 16:02:16,193 INFO L125 PetriNetUnfolderBase]: For 141224/141236 co-relation queries the response was YES. [2024-06-04 16:02:16,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22668 conditions, 3616 events. 2132/3616 cut-off events. For 141224/141236 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22673 event pairs, 469 based on Foata normal form. 11/3622 useless extension candidates. Maximal degree in co-relation 22547. Up to 3150 conditions per place. [2024-06-04 16:02:16,228 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 249 selfloop transitions, 64 changer transitions 0/319 dead transitions. [2024-06-04 16:02:16,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 319 transitions, 4595 flow [2024-06-04 16:02:16,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 16:02:16,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:02:16,229 INFO L175 Difference]: Start difference. First operand has 249 places, 303 transitions, 3813 flow. Second operand 5 states and 123 transitions. [2024-06-04 16:02:16,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 319 transitions, 4595 flow [2024-06-04 16:02:16,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 319 transitions, 4436 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:16,611 INFO L231 Difference]: Finished difference. Result has 249 places, 303 transitions, 3796 flow [2024-06-04 16:02:16,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3654, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3796, PETRI_PLACES=249, PETRI_TRANSITIONS=303} [2024-06-04 16:02:16,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-04 16:02:16,611 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 303 transitions, 3796 flow [2024-06-04 16:02:16,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:16,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:16,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:16,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 16:02:16,612 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:16,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:16,612 INFO L85 PathProgramCache]: Analyzing trace with hash 521358687, now seen corresponding path program 5 times [2024-06-04 16:02:16,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:16,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370766528] [2024-06-04 16:02:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:16,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:16,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:16,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370766528] [2024-06-04 16:02:16,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370766528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:16,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:16,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:16,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840688308] [2024-06-04 16:02:16,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:16,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:16,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:16,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:16,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:16,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:16,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 303 transitions, 3796 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:16,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:16,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:16,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:17,581 INFO L124 PetriNetUnfolderBase]: 2155/3651 cut-off events. [2024-06-04 16:02:17,581 INFO L125 PetriNetUnfolderBase]: For 146600/146600 co-relation queries the response was YES. [2024-06-04 16:02:17,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23016 conditions, 3651 events. 2155/3651 cut-off events. For 146600/146600 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 22897 event pairs, 440 based on Foata normal form. 1/3648 useless extension candidates. Maximal degree in co-relation 22894. Up to 3243 conditions per place. [2024-06-04 16:02:17,622 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 294 selfloop transitions, 55 changer transitions 0/355 dead transitions. [2024-06-04 16:02:17,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 355 transitions, 4882 flow [2024-06-04 16:02:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:02:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:02:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 272 transitions. [2024-06-04 16:02:17,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103189493433395 [2024-06-04 16:02:17,623 INFO L175 Difference]: Start difference. First operand has 249 places, 303 transitions, 3796 flow. Second operand 13 states and 272 transitions. [2024-06-04 16:02:17,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 355 transitions, 4882 flow [2024-06-04 16:02:18,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 355 transitions, 4781 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:18,154 INFO L231 Difference]: Finished difference. Result has 260 places, 315 transitions, 4018 flow [2024-06-04 16:02:18,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3700, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4018, PETRI_PLACES=260, PETRI_TRANSITIONS=315} [2024-06-04 16:02:18,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-04 16:02:18,155 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 315 transitions, 4018 flow [2024-06-04 16:02:18,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:18,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:18,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:18,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 16:02:18,155 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:18,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:18,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1253554977, now seen corresponding path program 6 times [2024-06-04 16:02:18,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:18,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309050210] [2024-06-04 16:02:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:18,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:18,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:18,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309050210] [2024-06-04 16:02:18,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309050210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:18,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:18,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:18,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84717221] [2024-06-04 16:02:18,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:18,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:18,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 315 transitions, 4018 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:18,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:18,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:18,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:19,195 INFO L124 PetriNetUnfolderBase]: 2176/3686 cut-off events. [2024-06-04 16:02:19,195 INFO L125 PetriNetUnfolderBase]: For 150560/150560 co-relation queries the response was YES. [2024-06-04 16:02:19,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23453 conditions, 3686 events. 2176/3686 cut-off events. For 150560/150560 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23110 event pairs, 440 based on Foata normal form. 1/3683 useless extension candidates. Maximal degree in co-relation 23329. Up to 3102 conditions per place. [2024-06-04 16:02:19,236 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 149 changer transitions 0/361 dead transitions. [2024-06-04 16:02:19,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 361 transitions, 5068 flow [2024-06-04 16:02:19,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:02:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:02:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 314 transitions. [2024-06-04 16:02:19,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510569105691057 [2024-06-04 16:02:19,237 INFO L175 Difference]: Start difference. First operand has 260 places, 315 transitions, 4018 flow. Second operand 15 states and 314 transitions. [2024-06-04 16:02:19,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 361 transitions, 5068 flow [2024-06-04 16:02:19,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 361 transitions, 5002 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:19,692 INFO L231 Difference]: Finished difference. Result has 270 places, 322 transitions, 4418 flow [2024-06-04 16:02:19,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4418, PETRI_PLACES=270, PETRI_TRANSITIONS=322} [2024-06-04 16:02:19,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-04 16:02:19,692 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 322 transitions, 4418 flow [2024-06-04 16:02:19,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:19,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:19,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:19,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 16:02:19,693 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:19,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:19,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1121141791, now seen corresponding path program 7 times [2024-06-04 16:02:19,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:19,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522216774] [2024-06-04 16:02:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:19,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:20,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:20,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522216774] [2024-06-04 16:02:20,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522216774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:20,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:20,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:20,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709676497] [2024-06-04 16:02:20,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:20,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:20,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:20,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:20,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:20,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:20,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 322 transitions, 4418 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:20,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:20,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:20,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:20,835 INFO L124 PetriNetUnfolderBase]: 2164/3669 cut-off events. [2024-06-04 16:02:20,836 INFO L125 PetriNetUnfolderBase]: For 156540/156543 co-relation queries the response was YES. [2024-06-04 16:02:20,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24034 conditions, 3669 events. 2164/3669 cut-off events. For 156540/156543 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 23053 event pairs, 444 based on Foata normal form. 6/3671 useless extension candidates. Maximal degree in co-relation 23907. Up to 3198 conditions per place. [2024-06-04 16:02:20,877 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 253 selfloop transitions, 93 changer transitions 0/352 dead transitions. [2024-06-04 16:02:20,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 352 transitions, 5186 flow [2024-06-04 16:02:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:02:20,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-04 16:02:20,878 INFO L175 Difference]: Start difference. First operand has 270 places, 322 transitions, 4418 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:02:20,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 352 transitions, 5186 flow [2024-06-04 16:02:21,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 352 transitions, 4838 flow, removed 49 selfloop flow, removed 13 redundant places. [2024-06-04 16:02:21,334 INFO L231 Difference]: Finished difference. Result has 265 places, 322 transitions, 4275 flow [2024-06-04 16:02:21,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4275, PETRI_PLACES=265, PETRI_TRANSITIONS=322} [2024-06-04 16:02:21,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-04 16:02:21,334 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 322 transitions, 4275 flow [2024-06-04 16:02:21,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:21,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:21,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:21,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 16:02:21,335 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:21,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:21,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1122416041, now seen corresponding path program 4 times [2024-06-04 16:02:21,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:21,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999394875] [2024-06-04 16:02:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:21,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:21,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:21,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999394875] [2024-06-04 16:02:21,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999394875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:21,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:21,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:21,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306343860] [2024-06-04 16:02:21,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:21,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:21,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:21,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:21,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:21,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:21,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 322 transitions, 4275 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:21,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:21,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:21,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:22,254 INFO L124 PetriNetUnfolderBase]: 2161/3671 cut-off events. [2024-06-04 16:02:22,254 INFO L125 PetriNetUnfolderBase]: For 154081/154091 co-relation queries the response was YES. [2024-06-04 16:02:22,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23762 conditions, 3671 events. 2161/3671 cut-off events. For 154081/154091 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23120 event pairs, 465 based on Foata normal form. 9/3675 useless extension candidates. Maximal degree in co-relation 23636. Up to 3189 conditions per place. [2024-06-04 16:02:22,295 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 255 selfloop transitions, 78 changer transitions 0/339 dead transitions. [2024-06-04 16:02:22,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 339 transitions, 4983 flow [2024-06-04 16:02:22,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 16:02:22,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-04 16:02:22,296 INFO L175 Difference]: Start difference. First operand has 265 places, 322 transitions, 4275 flow. Second operand 7 states and 159 transitions. [2024-06-04 16:02:22,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 339 transitions, 4983 flow [2024-06-04 16:02:22,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 339 transitions, 4770 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:22,904 INFO L231 Difference]: Finished difference. Result has 265 places, 322 transitions, 4228 flow [2024-06-04 16:02:22,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4062, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4228, PETRI_PLACES=265, PETRI_TRANSITIONS=322} [2024-06-04 16:02:22,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-04 16:02:22,904 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 322 transitions, 4228 flow [2024-06-04 16:02:22,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:22,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:22,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:22,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 16:02:22,905 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:22,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash -995949497, now seen corresponding path program 5 times [2024-06-04 16:02:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:22,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471620205] [2024-06-04 16:02:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:22,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:23,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:23,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471620205] [2024-06-04 16:02:23,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471620205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:23,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:23,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:23,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895219956] [2024-06-04 16:02:23,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:23,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:23,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:23,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:23,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:23,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:23,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 322 transitions, 4228 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:23,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:23,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:23,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:23,822 INFO L124 PetriNetUnfolderBase]: 2158/3665 cut-off events. [2024-06-04 16:02:23,822 INFO L125 PetriNetUnfolderBase]: For 156715/156718 co-relation queries the response was YES. [2024-06-04 16:02:23,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23690 conditions, 3665 events. 2158/3665 cut-off events. For 156715/156718 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23101 event pairs, 499 based on Foata normal form. 3/3660 useless extension candidates. Maximal degree in co-relation 23563. Up to 3154 conditions per place. [2024-06-04 16:02:23,868 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 244 selfloop transitions, 82 changer transitions 0/332 dead transitions. [2024-06-04 16:02:23,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 332 transitions, 4904 flow [2024-06-04 16:02:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-04 16:02:23,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-04 16:02:23,869 INFO L175 Difference]: Start difference. First operand has 265 places, 322 transitions, 4228 flow. Second operand 6 states and 134 transitions. [2024-06-04 16:02:23,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 332 transitions, 4904 flow [2024-06-04 16:02:24,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 332 transitions, 4680 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:24,392 INFO L231 Difference]: Finished difference. Result has 263 places, 322 transitions, 4174 flow [2024-06-04 16:02:24,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4004, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4174, PETRI_PLACES=263, PETRI_TRANSITIONS=322} [2024-06-04 16:02:24,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-04 16:02:24,392 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 322 transitions, 4174 flow [2024-06-04 16:02:24,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:24,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:24,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:24,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 16:02:24,393 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:24,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:24,393 INFO L85 PathProgramCache]: Analyzing trace with hash -995552759, now seen corresponding path program 1 times [2024-06-04 16:02:24,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:24,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434237574] [2024-06-04 16:02:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:24,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:24,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:24,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434237574] [2024-06-04 16:02:24,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434237574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:24,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:24,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:24,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819481504] [2024-06-04 16:02:24,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:24,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:24,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:24,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:24,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:24,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 322 transitions, 4174 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:24,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:24,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:24,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:25,338 INFO L124 PetriNetUnfolderBase]: 2178/3695 cut-off events. [2024-06-04 16:02:25,338 INFO L125 PetriNetUnfolderBase]: For 165461/165461 co-relation queries the response was YES. [2024-06-04 16:02:25,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23753 conditions, 3695 events. 2178/3695 cut-off events. For 165461/165461 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 23248 event pairs, 453 based on Foata normal form. 6/3697 useless extension candidates. Maximal degree in co-relation 23626. Up to 3245 conditions per place. [2024-06-04 16:02:25,376 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 307 selfloop transitions, 33 changer transitions 0/346 dead transitions. [2024-06-04 16:02:25,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 346 transitions, 5001 flow [2024-06-04 16:02:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-04 16:02:25,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-04 16:02:25,377 INFO L175 Difference]: Start difference. First operand has 263 places, 322 transitions, 4174 flow. Second operand 6 states and 136 transitions. [2024-06-04 16:02:25,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 346 transitions, 5001 flow [2024-06-04 16:02:25,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 346 transitions, 4719 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:25,930 INFO L231 Difference]: Finished difference. Result has 263 places, 326 transitions, 4004 flow [2024-06-04 16:02:25,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3892, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4004, PETRI_PLACES=263, PETRI_TRANSITIONS=326} [2024-06-04 16:02:25,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-04 16:02:25,931 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 326 transitions, 4004 flow [2024-06-04 16:02:25,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:25,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:25,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:25,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 16:02:25,931 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:25,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:25,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1446056945, now seen corresponding path program 8 times [2024-06-04 16:02:25,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:25,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23604842] [2024-06-04 16:02:25,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:25,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:26,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:26,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23604842] [2024-06-04 16:02:26,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23604842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:26,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:26,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:26,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127358893] [2024-06-04 16:02:26,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:26,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:26,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:26,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:26,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:26,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 326 transitions, 4004 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:26,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:26,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:26,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:26,953 INFO L124 PetriNetUnfolderBase]: 2223/3770 cut-off events. [2024-06-04 16:02:26,954 INFO L125 PetriNetUnfolderBase]: For 169414/169414 co-relation queries the response was YES. [2024-06-04 16:02:26,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24583 conditions, 3770 events. 2223/3770 cut-off events. For 169414/169414 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 23796 event pairs, 446 based on Foata normal form. 1/3767 useless extension candidates. Maximal degree in co-relation 24455. Up to 2994 conditions per place. [2024-06-04 16:02:26,998 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 174 selfloop transitions, 196 changer transitions 0/376 dead transitions. [2024-06-04 16:02:26,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 376 transitions, 5506 flow [2024-06-04 16:02:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-04 16:02:26,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:02:26,999 INFO L175 Difference]: Start difference. First operand has 263 places, 326 transitions, 4004 flow. Second operand 10 states and 230 transitions. [2024-06-04 16:02:27,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 376 transitions, 5506 flow [2024-06-04 16:02:27,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 376 transitions, 5466 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:27,604 INFO L231 Difference]: Finished difference. Result has 271 places, 343 transitions, 4669 flow [2024-06-04 16:02:27,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3965, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4669, PETRI_PLACES=271, PETRI_TRANSITIONS=343} [2024-06-04 16:02:27,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-04 16:02:27,605 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 343 transitions, 4669 flow [2024-06-04 16:02:27,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:27,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:27,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:27,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 16:02:27,606 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:27,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:27,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1255396923, now seen corresponding path program 9 times [2024-06-04 16:02:27,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:27,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110634135] [2024-06-04 16:02:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:27,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:27,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:27,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110634135] [2024-06-04 16:02:27,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110634135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:27,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:27,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:27,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936586531] [2024-06-04 16:02:27,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:27,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:27,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:27,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:27,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:28,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:28,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 343 transitions, 4669 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:28,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:28,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:28,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:28,720 INFO L124 PetriNetUnfolderBase]: 2382/4034 cut-off events. [2024-06-04 16:02:28,720 INFO L125 PetriNetUnfolderBase]: For 197965/197975 co-relation queries the response was YES. [2024-06-04 16:02:28,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27956 conditions, 4034 events. 2382/4034 cut-off events. For 197965/197975 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 25788 event pairs, 457 based on Foata normal form. 9/4038 useless extension candidates. Maximal degree in co-relation 27826. Up to 3271 conditions per place. [2024-06-04 16:02:28,768 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 291 selfloop transitions, 145 changer transitions 0/442 dead transitions. [2024-06-04 16:02:28,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 442 transitions, 6789 flow [2024-06-04 16:02:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:02:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:02:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 277 transitions. [2024-06-04 16:02:28,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196998123827392 [2024-06-04 16:02:28,770 INFO L175 Difference]: Start difference. First operand has 271 places, 343 transitions, 4669 flow. Second operand 13 states and 277 transitions. [2024-06-04 16:02:28,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 442 transitions, 6789 flow [2024-06-04 16:02:29,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 442 transitions, 6337 flow, removed 103 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:29,410 INFO L231 Difference]: Finished difference. Result has 281 places, 391 transitions, 5455 flow [2024-06-04 16:02:29,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5455, PETRI_PLACES=281, PETRI_TRANSITIONS=391} [2024-06-04 16:02:29,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-04 16:02:29,410 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 391 transitions, 5455 flow [2024-06-04 16:02:29,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:29,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:29,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:29,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 16:02:29,411 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:29,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:29,411 INFO L85 PathProgramCache]: Analyzing trace with hash -563275775, now seen corresponding path program 10 times [2024-06-04 16:02:29,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:29,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841501184] [2024-06-04 16:02:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:29,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:29,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:29,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841501184] [2024-06-04 16:02:29,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841501184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:29,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:29,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:29,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411530553] [2024-06-04 16:02:29,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:29,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:29,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:29,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:29,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:29,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 391 transitions, 5455 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:29,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:29,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:29,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:30,629 INFO L124 PetriNetUnfolderBase]: 2379/4032 cut-off events. [2024-06-04 16:02:30,629 INFO L125 PetriNetUnfolderBase]: For 191579/191587 co-relation queries the response was YES. [2024-06-04 16:02:30,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27661 conditions, 4032 events. 2379/4032 cut-off events. For 191579/191587 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 25770 event pairs, 457 based on Foata normal form. 7/4034 useless extension candidates. Maximal degree in co-relation 27528. Up to 3269 conditions per place. [2024-06-04 16:02:30,671 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 293 selfloop transitions, 143 changer transitions 0/442 dead transitions. [2024-06-04 16:02:30,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 442 transitions, 6851 flow [2024-06-04 16:02:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:02:30,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:02:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 278 transitions. [2024-06-04 16:02:30,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215759849906192 [2024-06-04 16:02:30,673 INFO L175 Difference]: Start difference. First operand has 281 places, 391 transitions, 5455 flow. Second operand 13 states and 278 transitions. [2024-06-04 16:02:30,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 442 transitions, 6851 flow [2024-06-04 16:02:31,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 442 transitions, 6706 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:31,319 INFO L231 Difference]: Finished difference. Result has 288 places, 391 transitions, 5602 flow [2024-06-04 16:02:31,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5310, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5602, PETRI_PLACES=288, PETRI_TRANSITIONS=391} [2024-06-04 16:02:31,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-04 16:02:31,319 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 391 transitions, 5602 flow [2024-06-04 16:02:31,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:31,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:31,320 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] [2024-06-04 16:02:31,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 16:02:31,320 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:31,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash 197076349, now seen corresponding path program 11 times [2024-06-04 16:02:31,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:31,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936639794] [2024-06-04 16:02:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:31,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:31,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:31,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936639794] [2024-06-04 16:02:31,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936639794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:31,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:31,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:31,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403546403] [2024-06-04 16:02:31,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:31,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:31,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:31,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:31,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:31,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:31,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 391 transitions, 5602 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:31,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:31,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:31,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:32,416 INFO L124 PetriNetUnfolderBase]: 2384/4036 cut-off events. [2024-06-04 16:02:32,416 INFO L125 PetriNetUnfolderBase]: For 196318/196318 co-relation queries the response was YES. [2024-06-04 16:02:32,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28063 conditions, 4036 events. 2384/4036 cut-off events. For 196318/196318 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 25813 event pairs, 446 based on Foata normal form. 1/4033 useless extension candidates. Maximal degree in co-relation 27928. Up to 3273 conditions per place. [2024-06-04 16:02:32,464 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 176 changer transitions 0/450 dead transitions. [2024-06-04 16:02:32,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 450 transitions, 7345 flow [2024-06-04 16:02:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:02:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:02:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 287 transitions. [2024-06-04 16:02:32,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-04 16:02:32,465 INFO L175 Difference]: Start difference. First operand has 288 places, 391 transitions, 5602 flow. Second operand 13 states and 287 transitions. [2024-06-04 16:02:32,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 450 transitions, 7345 flow [2024-06-04 16:02:33,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 450 transitions, 7058 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-04 16:02:33,179 INFO L231 Difference]: Finished difference. Result has 295 places, 402 transitions, 6048 flow [2024-06-04 16:02:33,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6048, PETRI_PLACES=295, PETRI_TRANSITIONS=402} [2024-06-04 16:02:33,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-04 16:02:33,180 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 402 transitions, 6048 flow [2024-06-04 16:02:33,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:33,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:33,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:33,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 16:02:33,180 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:33,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:33,181 INFO L85 PathProgramCache]: Analyzing trace with hash -278997729, now seen corresponding path program 12 times [2024-06-04 16:02:33,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:33,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333041439] [2024-06-04 16:02:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:33,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:33,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:33,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333041439] [2024-06-04 16:02:33,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333041439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:33,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:33,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:33,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333998813] [2024-06-04 16:02:33,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:33,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:33,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:33,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:33,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:33,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:33,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 402 transitions, 6048 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:33,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:33,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:33,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:34,250 INFO L124 PetriNetUnfolderBase]: 2410/4085 cut-off events. [2024-06-04 16:02:34,250 INFO L125 PetriNetUnfolderBase]: For 209796/209804 co-relation queries the response was YES. [2024-06-04 16:02:34,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29047 conditions, 4085 events. 2410/4085 cut-off events. For 209796/209804 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26207 event pairs, 457 based on Foata normal form. 8/4088 useless extension candidates. Maximal degree in co-relation 28907. Up to 3298 conditions per place. [2024-06-04 16:02:34,299 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 145 changer transitions 0/447 dead transitions. [2024-06-04 16:02:34,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 447 transitions, 7509 flow [2024-06-04 16:02:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-04 16:02:34,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532150776053215 [2024-06-04 16:02:34,300 INFO L175 Difference]: Start difference. First operand has 295 places, 402 transitions, 6048 flow. Second operand 11 states and 240 transitions. [2024-06-04 16:02:34,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 447 transitions, 7509 flow [2024-06-04 16:02:35,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 447 transitions, 7289 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:35,056 INFO L231 Difference]: Finished difference. Result has 298 places, 411 transitions, 6291 flow [2024-06-04 16:02:35,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5848, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6291, PETRI_PLACES=298, PETRI_TRANSITIONS=411} [2024-06-04 16:02:35,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-04 16:02:35,056 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 411 transitions, 6291 flow [2024-06-04 16:02:35,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:35,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:35,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:35,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 16:02:35,057 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:35,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:35,057 INFO L85 PathProgramCache]: Analyzing trace with hash 191833939, now seen corresponding path program 13 times [2024-06-04 16:02:35,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:35,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151213506] [2024-06-04 16:02:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:35,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:35,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:35,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151213506] [2024-06-04 16:02:35,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151213506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:35,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:35,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:35,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369656577] [2024-06-04 16:02:35,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:35,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:35,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:35,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:35,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:35,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:35,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 411 transitions, 6291 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:35,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:35,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:35,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:36,233 INFO L124 PetriNetUnfolderBase]: 2395/4057 cut-off events. [2024-06-04 16:02:36,233 INFO L125 PetriNetUnfolderBase]: For 205516/205519 co-relation queries the response was YES. [2024-06-04 16:02:36,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28548 conditions, 4057 events. 2395/4057 cut-off events. For 205516/205519 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26036 event pairs, 451 based on Foata normal form. 7/4060 useless extension candidates. Maximal degree in co-relation 28408. Up to 3449 conditions per place. [2024-06-04 16:02:36,287 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 306 selfloop transitions, 125 changer transitions 0/437 dead transitions. [2024-06-04 16:02:36,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 437 transitions, 7219 flow [2024-06-04 16:02:36,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:02:36,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 16:02:36,288 INFO L175 Difference]: Start difference. First operand has 298 places, 411 transitions, 6291 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:02:36,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 437 transitions, 7219 flow [2024-06-04 16:02:36,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 437 transitions, 6931 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:36,985 INFO L231 Difference]: Finished difference. Result has 298 places, 411 transitions, 6289 flow [2024-06-04 16:02:36,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6003, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6289, PETRI_PLACES=298, PETRI_TRANSITIONS=411} [2024-06-04 16:02:36,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-04 16:02:36,986 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 411 transitions, 6289 flow [2024-06-04 16:02:36,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:36,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:36,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:36,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 16:02:36,986 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:36,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:36,987 INFO L85 PathProgramCache]: Analyzing trace with hash 961723167, now seen corresponding path program 14 times [2024-06-04 16:02:36,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:36,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198706959] [2024-06-04 16:02:36,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:36,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:37,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:37,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198706959] [2024-06-04 16:02:37,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198706959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:37,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:37,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:37,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692526885] [2024-06-04 16:02:37,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:37,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:37,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:37,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:37,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:37,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:37,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 411 transitions, 6289 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:37,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:37,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:37,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:38,162 INFO L124 PetriNetUnfolderBase]: 2392/4054 cut-off events. [2024-06-04 16:02:38,163 INFO L125 PetriNetUnfolderBase]: For 199343/199343 co-relation queries the response was YES. [2024-06-04 16:02:38,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28458 conditions, 4054 events. 2392/4054 cut-off events. For 199343/199343 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 25986 event pairs, 446 based on Foata normal form. 1/4051 useless extension candidates. Maximal degree in co-relation 28317. Up to 3281 conditions per place. [2024-06-04 16:02:38,217 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 183 changer transitions 0/455 dead transitions. [2024-06-04 16:02:38,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 455 transitions, 7768 flow [2024-06-04 16:02:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:02:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:02:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 266 transitions. [2024-06-04 16:02:38,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-04 16:02:38,218 INFO L175 Difference]: Start difference. First operand has 298 places, 411 transitions, 6289 flow. Second operand 12 states and 266 transitions. [2024-06-04 16:02:38,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 455 transitions, 7768 flow [2024-06-04 16:02:38,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 455 transitions, 7498 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:38,965 INFO L231 Difference]: Finished difference. Result has 303 places, 412 transitions, 6426 flow [2024-06-04 16:02:38,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6029, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6426, PETRI_PLACES=303, PETRI_TRANSITIONS=412} [2024-06-04 16:02:38,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-04 16:02:38,966 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 412 transitions, 6426 flow [2024-06-04 16:02:38,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:38,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:38,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:38,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 16:02:38,966 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:38,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:38,967 INFO L85 PathProgramCache]: Analyzing trace with hash 965442237, now seen corresponding path program 15 times [2024-06-04 16:02:38,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:38,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063868832] [2024-06-04 16:02:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:38,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:39,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:39,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063868832] [2024-06-04 16:02:39,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063868832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:39,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:39,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:39,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439626914] [2024-06-04 16:02:39,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:39,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:39,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:39,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:39,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:39,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 412 transitions, 6426 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:39,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:39,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:39,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:40,180 INFO L124 PetriNetUnfolderBase]: 2393/4059 cut-off events. [2024-06-04 16:02:40,180 INFO L125 PetriNetUnfolderBase]: For 202356/202359 co-relation queries the response was YES. [2024-06-04 16:02:40,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28450 conditions, 4059 events. 2393/4059 cut-off events. For 202356/202359 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 26097 event pairs, 451 based on Foata normal form. 7/4062 useless extension candidates. Maximal degree in co-relation 28309. Up to 3357 conditions per place. [2024-06-04 16:02:40,232 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 179 changer transitions 0/446 dead transitions. [2024-06-04 16:02:40,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 446 transitions, 7464 flow [2024-06-04 16:02:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:02:40,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-04 16:02:40,233 INFO L175 Difference]: Start difference. First operand has 303 places, 412 transitions, 6426 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:02:40,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 446 transitions, 7464 flow [2024-06-04 16:02:40,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 446 transitions, 7085 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-04 16:02:40,932 INFO L231 Difference]: Finished difference. Result has 301 places, 416 transitions, 6532 flow [2024-06-04 16:02:40,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6047, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6532, PETRI_PLACES=301, PETRI_TRANSITIONS=416} [2024-06-04 16:02:40,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-04 16:02:40,933 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 416 transitions, 6532 flow [2024-06-04 16:02:40,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:40,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:40,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:40,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 16:02:40,934 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:40,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:40,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1013798847, now seen corresponding path program 16 times [2024-06-04 16:02:40,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:40,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880554023] [2024-06-04 16:02:40,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:40,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:41,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:41,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880554023] [2024-06-04 16:02:41,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880554023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:41,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:41,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:41,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859942509] [2024-06-04 16:02:41,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:41,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:41,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:41,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:41,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:41,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 416 transitions, 6532 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:41,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:41,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:41,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:42,085 INFO L124 PetriNetUnfolderBase]: 2381/4049 cut-off events. [2024-06-04 16:02:42,085 INFO L125 PetriNetUnfolderBase]: For 192326/192334 co-relation queries the response was YES. [2024-06-04 16:02:42,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28095 conditions, 4049 events. 2381/4049 cut-off events. For 192326/192334 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26075 event pairs, 478 based on Foata normal form. 10/4054 useless extension candidates. Maximal degree in co-relation 27954. Up to 3196 conditions per place. [2024-06-04 16:02:42,126 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 176 changer transitions 0/443 dead transitions. [2024-06-04 16:02:42,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 443 transitions, 7608 flow [2024-06-04 16:02:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:02:42,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-04 16:02:42,127 INFO L175 Difference]: Start difference. First operand has 301 places, 416 transitions, 6532 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:02:42,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 443 transitions, 7608 flow [2024-06-04 16:02:42,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 443 transitions, 7162 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:42,869 INFO L231 Difference]: Finished difference. Result has 300 places, 416 transitions, 6458 flow [2024-06-04 16:02:42,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6090, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6458, PETRI_PLACES=300, PETRI_TRANSITIONS=416} [2024-06-04 16:02:42,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-04 16:02:42,870 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 416 transitions, 6458 flow [2024-06-04 16:02:42,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:42,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:42,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:42,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 16:02:42,870 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:42,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:42,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1598252169, now seen corresponding path program 2 times [2024-06-04 16:02:42,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:42,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509993083] [2024-06-04 16:02:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:42,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:43,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:43,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509993083] [2024-06-04 16:02:43,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509993083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:43,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:43,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:43,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450911288] [2024-06-04 16:02:43,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:43,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:43,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:43,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:43,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:43,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:43,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 416 transitions, 6458 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:43,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:43,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:43,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:43,951 INFO L124 PetriNetUnfolderBase]: 2401/4078 cut-off events. [2024-06-04 16:02:43,951 INFO L125 PetriNetUnfolderBase]: For 190752/190752 co-relation queries the response was YES. [2024-06-04 16:02:43,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28070 conditions, 4078 events. 2401/4078 cut-off events. For 190752/190752 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26169 event pairs, 358 based on Foata normal form. 6/4081 useless extension candidates. Maximal degree in co-relation 27930. Up to 3557 conditions per place. [2024-06-04 16:02:44,001 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 408 selfloop transitions, 35 changer transitions 0/449 dead transitions. [2024-06-04 16:02:44,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 449 transitions, 7544 flow [2024-06-04 16:02:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:02:44,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:02:44,002 INFO L175 Difference]: Start difference. First operand has 300 places, 416 transitions, 6458 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:02:44,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 449 transitions, 7544 flow [2024-06-04 16:02:44,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 449 transitions, 7149 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:44,707 INFO L231 Difference]: Finished difference. Result has 301 places, 419 transitions, 6175 flow [2024-06-04 16:02:44,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6063, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6175, PETRI_PLACES=301, PETRI_TRANSITIONS=419} [2024-06-04 16:02:44,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-04 16:02:44,707 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 419 transitions, 6175 flow [2024-06-04 16:02:44,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:44,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:44,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:44,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 16:02:44,707 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:44,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:44,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2041080969, now seen corresponding path program 3 times [2024-06-04 16:02:44,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:44,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183419468] [2024-06-04 16:02:44,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:44,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:45,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:45,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183419468] [2024-06-04 16:02:45,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183419468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:45,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:45,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:45,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611209320] [2024-06-04 16:02:45,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:45,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:45,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:45,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:45,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:45,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:45,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 419 transitions, 6175 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:45,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:45,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:45,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:45,741 INFO L124 PetriNetUnfolderBase]: 2388/4060 cut-off events. [2024-06-04 16:02:45,742 INFO L125 PetriNetUnfolderBase]: For 176969/176969 co-relation queries the response was YES. [2024-06-04 16:02:45,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27196 conditions, 4060 events. 2388/4060 cut-off events. For 176969/176969 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 25996 event pairs, 373 based on Foata normal form. 6/4062 useless extension candidates. Maximal degree in co-relation 27055. Up to 3382 conditions per place. [2024-06-04 16:02:45,789 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 405 selfloop transitions, 35 changer transitions 0/446 dead transitions. [2024-06-04 16:02:45,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 446 transitions, 7233 flow [2024-06-04 16:02:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-04 16:02:45,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:02:45,789 INFO L175 Difference]: Start difference. First operand has 301 places, 419 transitions, 6175 flow. Second operand 6 states and 138 transitions. [2024-06-04 16:02:45,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 446 transitions, 7233 flow [2024-06-04 16:02:46,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 446 transitions, 7189 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:46,458 INFO L231 Difference]: Finished difference. Result has 306 places, 421 transitions, 6226 flow [2024-06-04 16:02:46,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6131, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6226, PETRI_PLACES=306, PETRI_TRANSITIONS=421} [2024-06-04 16:02:46,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-04 16:02:46,458 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 421 transitions, 6226 flow [2024-06-04 16:02:46,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:46,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:46,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:46,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 16:02:46,459 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:46,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:46,459 INFO L85 PathProgramCache]: Analyzing trace with hash 192693333, now seen corresponding path program 1 times [2024-06-04 16:02:46,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:46,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118927946] [2024-06-04 16:02:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:46,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:46,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:46,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118927946] [2024-06-04 16:02:46,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118927946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:46,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:46,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:46,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198770671] [2024-06-04 16:02:46,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:46,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:46,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:46,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:46,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:46,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:46,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 421 transitions, 6226 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:46,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:46,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:46,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:47,586 INFO L124 PetriNetUnfolderBase]: 2547/4333 cut-off events. [2024-06-04 16:02:47,586 INFO L125 PetriNetUnfolderBase]: For 241368/241376 co-relation queries the response was YES. [2024-06-04 16:02:47,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30362 conditions, 4333 events. 2547/4333 cut-off events. For 241368/241376 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 28155 event pairs, 412 based on Foata normal form. 18/4346 useless extension candidates. Maximal degree in co-relation 30218. Up to 3211 conditions per place. [2024-06-04 16:02:47,639 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 347 selfloop transitions, 106 changer transitions 0/459 dead transitions. [2024-06-04 16:02:47,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 459 transitions, 7678 flow [2024-06-04 16:02:47,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:02:47,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-04 16:02:47,639 INFO L175 Difference]: Start difference. First operand has 306 places, 421 transitions, 6226 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:02:47,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 459 transitions, 7678 flow [2024-06-04 16:02:48,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 459 transitions, 7551 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:48,268 INFO L231 Difference]: Finished difference. Result has 311 places, 426 transitions, 6436 flow [2024-06-04 16:02:48,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6099, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6436, PETRI_PLACES=311, PETRI_TRANSITIONS=426} [2024-06-04 16:02:48,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-04 16:02:48,269 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 426 transitions, 6436 flow [2024-06-04 16:02:48,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:48,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:48,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:48,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 16:02:48,269 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:48,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash -295423685, now seen corresponding path program 2 times [2024-06-04 16:02:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:48,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607388119] [2024-06-04 16:02:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:48,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:48,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:48,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607388119] [2024-06-04 16:02:48,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607388119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:48,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:48,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:48,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5871406] [2024-06-04 16:02:48,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:48,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:48,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:48,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:48,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:48,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 426 transitions, 6436 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:48,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:48,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:48,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:49,413 INFO L124 PetriNetUnfolderBase]: 2603/4421 cut-off events. [2024-06-04 16:02:49,414 INFO L125 PetriNetUnfolderBase]: For 260018/260026 co-relation queries the response was YES. [2024-06-04 16:02:49,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31197 conditions, 4421 events. 2603/4421 cut-off events. For 260018/260026 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28816 event pairs, 527 based on Foata normal form. 22/4438 useless extension candidates. Maximal degree in co-relation 31053. Up to 3714 conditions per place. [2024-06-04 16:02:49,466 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 343 selfloop transitions, 99 changer transitions 0/448 dead transitions. [2024-06-04 16:02:49,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 448 transitions, 7440 flow [2024-06-04 16:02:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-04 16:02:49,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-04 16:02:49,467 INFO L175 Difference]: Start difference. First operand has 311 places, 426 transitions, 6436 flow. Second operand 9 states and 193 transitions. [2024-06-04 16:02:49,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 448 transitions, 7440 flow [2024-06-04 16:02:50,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 448 transitions, 7289 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:50,251 INFO L231 Difference]: Finished difference. Result has 316 places, 428 transitions, 6535 flow [2024-06-04 16:02:50,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6285, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6535, PETRI_PLACES=316, PETRI_TRANSITIONS=428} [2024-06-04 16:02:50,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-04 16:02:50,252 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 428 transitions, 6535 flow [2024-06-04 16:02:50,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:50,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:50,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:50,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 16:02:50,252 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:50,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash -208735595, now seen corresponding path program 3 times [2024-06-04 16:02:50,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:50,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642367156] [2024-06-04 16:02:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:50,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:50,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:50,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642367156] [2024-06-04 16:02:50,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642367156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:50,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:50,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:50,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638213637] [2024-06-04 16:02:50,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:50,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:50,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:50,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:50,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:50,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:50,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 428 transitions, 6535 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:50,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:50,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:50,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:51,481 INFO L124 PetriNetUnfolderBase]: 2709/4589 cut-off events. [2024-06-04 16:02:51,481 INFO L125 PetriNetUnfolderBase]: For 284880/284888 co-relation queries the response was YES. [2024-06-04 16:02:51,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33284 conditions, 4589 events. 2709/4589 cut-off events. For 284880/284888 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 29993 event pairs, 536 based on Foata normal form. 18/4602 useless extension candidates. Maximal degree in co-relation 33138. Up to 3720 conditions per place. [2024-06-04 16:02:51,547 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 353 selfloop transitions, 97 changer transitions 0/456 dead transitions. [2024-06-04 16:02:51,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 456 transitions, 7771 flow [2024-06-04 16:02:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:51,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-04 16:02:51,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-04 16:02:51,547 INFO L175 Difference]: Start difference. First operand has 316 places, 428 transitions, 6535 flow. Second operand 9 states and 196 transitions. [2024-06-04 16:02:51,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 456 transitions, 7771 flow [2024-06-04 16:02:52,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 456 transitions, 7551 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:52,410 INFO L231 Difference]: Finished difference. Result has 319 places, 432 transitions, 6632 flow [2024-06-04 16:02:52,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6315, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6632, PETRI_PLACES=319, PETRI_TRANSITIONS=432} [2024-06-04 16:02:52,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-04 16:02:52,411 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 432 transitions, 6632 flow [2024-06-04 16:02:52,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:52,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:52,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:52,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 16:02:52,411 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:52,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:52,411 INFO L85 PathProgramCache]: Analyzing trace with hash -924166371, now seen corresponding path program 4 times [2024-06-04 16:02:52,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:52,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260549605] [2024-06-04 16:02:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:52,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:52,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:52,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260549605] [2024-06-04 16:02:52,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260549605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:52,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:52,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:52,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046387187] [2024-06-04 16:02:52,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:52,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:52,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:52,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:52,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:52,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:52,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 432 transitions, 6632 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:52,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:52,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:52,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:53,659 INFO L124 PetriNetUnfolderBase]: 2765/4677 cut-off events. [2024-06-04 16:02:53,660 INFO L125 PetriNetUnfolderBase]: For 306605/306613 co-relation queries the response was YES. [2024-06-04 16:02:53,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34082 conditions, 4677 events. 2765/4677 cut-off events. For 306605/306613 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 30678 event pairs, 572 based on Foata normal form. 22/4694 useless extension candidates. Maximal degree in co-relation 33934. Up to 3990 conditions per place. [2024-06-04 16:02:53,722 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 344 selfloop transitions, 103 changer transitions 0/453 dead transitions. [2024-06-04 16:02:53,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 453 transitions, 7652 flow [2024-06-04 16:02:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-04 16:02:53,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:02:53,723 INFO L175 Difference]: Start difference. First operand has 319 places, 432 transitions, 6632 flow. Second operand 8 states and 176 transitions. [2024-06-04 16:02:53,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 453 transitions, 7652 flow [2024-06-04 16:02:54,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 453 transitions, 7501 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:54,521 INFO L231 Difference]: Finished difference. Result has 322 places, 434 transitions, 6749 flow [2024-06-04 16:02:54,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6481, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6749, PETRI_PLACES=322, PETRI_TRANSITIONS=434} [2024-06-04 16:02:54,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-04 16:02:54,522 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 434 transitions, 6749 flow [2024-06-04 16:02:54,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:54,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:54,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:54,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 16:02:54,523 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:54,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:54,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1013373837, now seen corresponding path program 5 times [2024-06-04 16:02:54,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:54,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931996744] [2024-06-04 16:02:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:54,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:54,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:54,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931996744] [2024-06-04 16:02:54,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931996744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:54,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:54,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:54,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737352929] [2024-06-04 16:02:54,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:54,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:54,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:54,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:54,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:54,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:54,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 434 transitions, 6749 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:54,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:54,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:54,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:55,743 INFO L124 PetriNetUnfolderBase]: 2808/4754 cut-off events. [2024-06-04 16:02:55,743 INFO L125 PetriNetUnfolderBase]: For 309570/309578 co-relation queries the response was YES. [2024-06-04 16:02:55,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34669 conditions, 4754 events. 2808/4754 cut-off events. For 309570/309578 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31263 event pairs, 591 based on Foata normal form. 22/4771 useless extension candidates. Maximal degree in co-relation 34519. Up to 4059 conditions per place. [2024-06-04 16:02:55,802 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 359 selfloop transitions, 88 changer transitions 0/453 dead transitions. [2024-06-04 16:02:55,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 453 transitions, 7769 flow [2024-06-04 16:02:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-04 16:02:55,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650406504065041 [2024-06-04 16:02:55,802 INFO L175 Difference]: Start difference. First operand has 322 places, 434 transitions, 6749 flow. Second operand 6 states and 139 transitions. [2024-06-04 16:02:55,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 453 transitions, 7769 flow [2024-06-04 16:02:56,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 453 transitions, 7535 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:56,667 INFO L231 Difference]: Finished difference. Result has 322 places, 436 transitions, 6757 flow [2024-06-04 16:02:56,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6515, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6757, PETRI_PLACES=322, PETRI_TRANSITIONS=436} [2024-06-04 16:02:56,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-04 16:02:56,668 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 436 transitions, 6757 flow [2024-06-04 16:02:56,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:56,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:56,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:56,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 16:02:56,668 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:56,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:56,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1013521707, now seen corresponding path program 6 times [2024-06-04 16:02:56,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:56,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135685605] [2024-06-04 16:02:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:56,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:57,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:57,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135685605] [2024-06-04 16:02:57,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135685605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:57,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:57,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:57,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666222853] [2024-06-04 16:02:57,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:57,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:57,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:57,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:57,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:57,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:57,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 436 transitions, 6757 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:57,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:57,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:57,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:57,908 INFO L124 PetriNetUnfolderBase]: 2822/4790 cut-off events. [2024-06-04 16:02:57,908 INFO L125 PetriNetUnfolderBase]: For 292132/292140 co-relation queries the response was YES. [2024-06-04 16:02:57,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34404 conditions, 4790 events. 2822/4790 cut-off events. For 292132/292140 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31603 event pairs, 485 based on Foata normal form. 18/4803 useless extension candidates. Maximal degree in co-relation 34253. Up to 3716 conditions per place. [2024-06-04 16:02:57,970 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 366 selfloop transitions, 91 changer transitions 0/463 dead transitions. [2024-06-04 16:02:57,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 463 transitions, 8005 flow [2024-06-04 16:02:57,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:02:57,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 16:02:57,971 INFO L175 Difference]: Start difference. First operand has 322 places, 436 transitions, 6757 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:02:57,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 463 transitions, 8005 flow [2024-06-04 16:02:58,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 463 transitions, 7797 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:58,953 INFO L231 Difference]: Finished difference. Result has 325 places, 439 transitions, 6871 flow [2024-06-04 16:02:58,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6549, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6871, PETRI_PLACES=325, PETRI_TRANSITIONS=439} [2024-06-04 16:02:58,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-04 16:02:58,954 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 439 transitions, 6871 flow [2024-06-04 16:02:58,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:58,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:58,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:58,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 16:02:58,954 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:58,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1007796255, now seen corresponding path program 1 times [2024-06-04 16:02:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:58,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063962141] [2024-06-04 16:02:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:59,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:59,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063962141] [2024-06-04 16:02:59,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063962141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:59,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:59,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:59,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713342834] [2024-06-04 16:02:59,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:59,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:59,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:59,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:59,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:59,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:59,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 439 transitions, 6871 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:59,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:59,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:59,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:00,294 INFO L124 PetriNetUnfolderBase]: 2829/4797 cut-off events. [2024-06-04 16:03:00,295 INFO L125 PetriNetUnfolderBase]: For 283716/283724 co-relation queries the response was YES. [2024-06-04 16:03:00,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34138 conditions, 4797 events. 2829/4797 cut-off events. For 283716/283724 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31657 event pairs, 547 based on Foata normal form. 18/4810 useless extension candidates. Maximal degree in co-relation 33985. Up to 3942 conditions per place. [2024-06-04 16:03:00,359 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 344 selfloop transitions, 112 changer transitions 0/462 dead transitions. [2024-06-04 16:03:00,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 462 transitions, 7903 flow [2024-06-04 16:03:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 16:03:00,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-04 16:03:00,364 INFO L175 Difference]: Start difference. First operand has 325 places, 439 transitions, 6871 flow. Second operand 8 states and 179 transitions. [2024-06-04 16:03:00,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 462 transitions, 7903 flow [2024-06-04 16:03:01,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 462 transitions, 7592 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:01,360 INFO L231 Difference]: Finished difference. Result has 328 places, 440 transitions, 6811 flow [2024-06-04 16:03:01,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6560, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6811, PETRI_PLACES=328, PETRI_TRANSITIONS=440} [2024-06-04 16:03:01,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-04 16:03:01,360 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 440 transitions, 6811 flow [2024-06-04 16:03:01,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:01,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:01,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:01,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 16:03:01,360 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:01,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:01,361 INFO L85 PathProgramCache]: Analyzing trace with hash -570935637, now seen corresponding path program 1 times [2024-06-04 16:03:01,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:01,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090087661] [2024-06-04 16:03:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:01,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:01,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:01,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090087661] [2024-06-04 16:03:01,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090087661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:01,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:01,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:01,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958064188] [2024-06-04 16:03:01,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:01,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:01,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:01,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:01,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:01,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:01,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 440 transitions, 6811 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:01,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:01,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:01,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:02,652 INFO L124 PetriNetUnfolderBase]: 2834/4807 cut-off events. [2024-06-04 16:03:02,652 INFO L125 PetriNetUnfolderBase]: For 257360/257365 co-relation queries the response was YES. [2024-06-04 16:03:02,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33642 conditions, 4807 events. 2834/4807 cut-off events. For 257360/257365 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 31768 event pairs, 582 based on Foata normal form. 5/4805 useless extension candidates. Maximal degree in co-relation 33489. Up to 3766 conditions per place. [2024-06-04 16:03:02,719 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 243 selfloop transitions, 227 changer transitions 0/476 dead transitions. [2024-06-04 16:03:02,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 476 transitions, 8223 flow [2024-06-04 16:03:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-04 16:03:02,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-04 16:03:02,720 INFO L175 Difference]: Start difference. First operand has 328 places, 440 transitions, 6811 flow. Second operand 12 states and 255 transitions. [2024-06-04 16:03:02,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 476 transitions, 8223 flow [2024-06-04 16:03:03,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 476 transitions, 7900 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:03,765 INFO L231 Difference]: Finished difference. Result has 333 places, 446 transitions, 7058 flow [2024-06-04 16:03:03,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6488, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7058, PETRI_PLACES=333, PETRI_TRANSITIONS=446} [2024-06-04 16:03:03,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-04 16:03:03,765 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 446 transitions, 7058 flow [2024-06-04 16:03:03,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:03,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:03,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:03,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 16:03:03,766 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:03,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:03,766 INFO L85 PathProgramCache]: Analyzing trace with hash -567210987, now seen corresponding path program 2 times [2024-06-04 16:03:03,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:03,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104331506] [2024-06-04 16:03:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:03,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:04,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:04,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104331506] [2024-06-04 16:03:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104331506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:04,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:04,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:04,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500847892] [2024-06-04 16:03:04,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:04,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:04,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:04,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:04,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 446 transitions, 7058 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:04,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:04,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:04,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:05,037 INFO L124 PetriNetUnfolderBase]: 2847/4830 cut-off events. [2024-06-04 16:03:05,038 INFO L125 PetriNetUnfolderBase]: For 269586/269594 co-relation queries the response was YES. [2024-06-04 16:03:05,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34277 conditions, 4830 events. 2847/4830 cut-off events. For 269586/269594 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 31960 event pairs, 587 based on Foata normal form. 7/4832 useless extension candidates. Maximal degree in co-relation 34124. Up to 4149 conditions per place. [2024-06-04 16:03:05,105 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 362 selfloop transitions, 111 changer transitions 0/479 dead transitions. [2024-06-04 16:03:05,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 479 transitions, 8486 flow [2024-06-04 16:03:05,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 16:03:05,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-04 16:03:05,106 INFO L175 Difference]: Start difference. First operand has 333 places, 446 transitions, 7058 flow. Second operand 9 states and 201 transitions. [2024-06-04 16:03:05,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 479 transitions, 8486 flow [2024-06-04 16:03:06,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 479 transitions, 8161 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:06,210 INFO L231 Difference]: Finished difference. Result has 334 places, 452 transitions, 7081 flow [2024-06-04 16:03:06,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7081, PETRI_PLACES=334, PETRI_TRANSITIONS=452} [2024-06-04 16:03:06,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-04 16:03:06,210 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 452 transitions, 7081 flow [2024-06-04 16:03:06,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:06,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:06,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:06,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 16:03:06,211 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:06,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:06,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1440957247, now seen corresponding path program 3 times [2024-06-04 16:03:06,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:06,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695110048] [2024-06-04 16:03:06,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:06,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:06,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:06,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695110048] [2024-06-04 16:03:06,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695110048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:06,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:06,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:06,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968793458] [2024-06-04 16:03:06,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:06,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:06,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:06,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:06,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:06,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:06,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 452 transitions, 7081 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:06,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:06,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:06,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:07,454 INFO L124 PetriNetUnfolderBase]: 2844/4826 cut-off events. [2024-06-04 16:03:07,454 INFO L125 PetriNetUnfolderBase]: For 265058/265066 co-relation queries the response was YES. [2024-06-04 16:03:07,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34137 conditions, 4826 events. 2844/4826 cut-off events. For 265058/265066 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 31930 event pairs, 587 based on Foata normal form. 7/4828 useless extension candidates. Maximal degree in co-relation 33984. Up to 4146 conditions per place. [2024-06-04 16:03:07,517 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 361 selfloop transitions, 109 changer transitions 0/476 dead transitions. [2024-06-04 16:03:07,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 476 transitions, 8231 flow [2024-06-04 16:03:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:03:07,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:03:07,518 INFO L175 Difference]: Start difference. First operand has 334 places, 452 transitions, 7081 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:03:07,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 476 transitions, 8231 flow [2024-06-04 16:03:08,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 476 transitions, 8000 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:08,502 INFO L231 Difference]: Finished difference. Result has 336 places, 452 transitions, 7075 flow [2024-06-04 16:03:08,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6850, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7075, PETRI_PLACES=336, PETRI_TRANSITIONS=452} [2024-06-04 16:03:08,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-04 16:03:08,503 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 452 transitions, 7075 flow [2024-06-04 16:03:08,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:08,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:08,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:08,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 16:03:08,503 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:08,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:08,503 INFO L85 PathProgramCache]: Analyzing trace with hash -197031793, now seen corresponding path program 4 times [2024-06-04 16:03:08,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:08,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480369781] [2024-06-04 16:03:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:08,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:08,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:08,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480369781] [2024-06-04 16:03:08,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480369781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:08,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:08,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:08,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144877279] [2024-06-04 16:03:08,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:08,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:08,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:08,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:08,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 452 transitions, 7075 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:08,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:08,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:08,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:09,895 INFO L124 PetriNetUnfolderBase]: 2881/4887 cut-off events. [2024-06-04 16:03:09,896 INFO L125 PetriNetUnfolderBase]: For 283324/283332 co-relation queries the response was YES. [2024-06-04 16:03:09,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34879 conditions, 4887 events. 2881/4887 cut-off events. For 283324/283332 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 32360 event pairs, 587 based on Foata normal form. 7/4889 useless extension candidates. Maximal degree in co-relation 34725. Up to 4123 conditions per place. [2024-06-04 16:03:09,967 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 328 selfloop transitions, 157 changer transitions 0/491 dead transitions. [2024-06-04 16:03:09,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 491 transitions, 8634 flow [2024-06-04 16:03:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-04 16:03:09,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-04 16:03:09,968 INFO L175 Difference]: Start difference. First operand has 336 places, 452 transitions, 7075 flow. Second operand 9 states and 197 transitions. [2024-06-04 16:03:09,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 491 transitions, 8634 flow [2024-06-04 16:03:11,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 491 transitions, 8410 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:11,077 INFO L231 Difference]: Finished difference. Result has 339 places, 467 transitions, 7410 flow [2024-06-04 16:03:11,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6857, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7410, PETRI_PLACES=339, PETRI_TRANSITIONS=467} [2024-06-04 16:03:11,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-04 16:03:11,078 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 467 transitions, 7410 flow [2024-06-04 16:03:11,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:11,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:11,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:11,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 16:03:11,078 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:11,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:11,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1011344726, now seen corresponding path program 1 times [2024-06-04 16:03:11,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:11,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132360198] [2024-06-04 16:03:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:11,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:11,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:11,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132360198] [2024-06-04 16:03:11,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132360198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:11,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:11,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:11,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694556940] [2024-06-04 16:03:11,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:11,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:11,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:11,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:11,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:11,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:11,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 467 transitions, 7410 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:11,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:11,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:11,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:12,456 INFO L124 PetriNetUnfolderBase]: 2915/4919 cut-off events. [2024-06-04 16:03:12,456 INFO L125 PetriNetUnfolderBase]: For 305539/305539 co-relation queries the response was YES. [2024-06-04 16:03:12,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35885 conditions, 4919 events. 2915/4919 cut-off events. For 305539/305539 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32471 event pairs, 544 based on Foata normal form. 2/4909 useless extension candidates. Maximal degree in co-relation 35730. Up to 4401 conditions per place. [2024-06-04 16:03:12,520 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 459 selfloop transitions, 40 changer transitions 0/505 dead transitions. [2024-06-04 16:03:12,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 505 transitions, 8791 flow [2024-06-04 16:03:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-04 16:03:12,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-04 16:03:12,523 INFO L175 Difference]: Start difference. First operand has 339 places, 467 transitions, 7410 flow. Second operand 10 states and 214 transitions. [2024-06-04 16:03:12,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 505 transitions, 8791 flow [2024-06-04 16:03:13,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 505 transitions, 8654 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:13,685 INFO L231 Difference]: Finished difference. Result has 346 places, 473 transitions, 7530 flow [2024-06-04 16:03:13,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7273, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7530, PETRI_PLACES=346, PETRI_TRANSITIONS=473} [2024-06-04 16:03:13,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-04 16:03:13,686 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 473 transitions, 7530 flow [2024-06-04 16:03:13,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:13,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:13,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:13,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 16:03:13,686 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:13,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:13,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1800142528, now seen corresponding path program 2 times [2024-06-04 16:03:13,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:13,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416771574] [2024-06-04 16:03:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:13,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:14,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:14,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416771574] [2024-06-04 16:03:14,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416771574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:14,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:14,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:14,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496382469] [2024-06-04 16:03:14,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:14,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:14,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:14,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:14,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 473 transitions, 7530 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:14,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:14,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:14,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:15,005 INFO L124 PetriNetUnfolderBase]: 2910/4923 cut-off events. [2024-06-04 16:03:15,005 INFO L125 PetriNetUnfolderBase]: For 306597/306597 co-relation queries the response was YES. [2024-06-04 16:03:15,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35984 conditions, 4923 events. 2910/4923 cut-off events. For 306597/306597 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32530 event pairs, 556 based on Foata normal form. 2/4919 useless extension candidates. Maximal degree in co-relation 35826. Up to 4249 conditions per place. [2024-06-04 16:03:15,072 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 125 changer transitions 0/502 dead transitions. [2024-06-04 16:03:15,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 502 transitions, 8592 flow [2024-06-04 16:03:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-04 16:03:15,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:03:15,073 INFO L175 Difference]: Start difference. First operand has 346 places, 473 transitions, 7530 flow. Second operand 12 states and 252 transitions. [2024-06-04 16:03:15,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 502 transitions, 8592 flow [2024-06-04 16:03:16,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 502 transitions, 8460 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:16,211 INFO L231 Difference]: Finished difference. Result has 351 places, 473 transitions, 7653 flow [2024-06-04 16:03:16,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7398, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7653, PETRI_PLACES=351, PETRI_TRANSITIONS=473} [2024-06-04 16:03:16,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-04 16:03:16,212 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 473 transitions, 7653 flow [2024-06-04 16:03:16,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:16,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:16,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:16,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 16:03:16,213 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:16,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:16,213 INFO L85 PathProgramCache]: Analyzing trace with hash -90199762, now seen corresponding path program 3 times [2024-06-04 16:03:16,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:16,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747524851] [2024-06-04 16:03:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:16,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:16,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:16,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747524851] [2024-06-04 16:03:16,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747524851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:16,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:16,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:16,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270840734] [2024-06-04 16:03:16,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:16,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:16,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:16,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:16,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:16,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:16,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 473 transitions, 7653 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:16,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:16,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:16,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:17,617 INFO L124 PetriNetUnfolderBase]: 2941/4966 cut-off events. [2024-06-04 16:03:17,618 INFO L125 PetriNetUnfolderBase]: For 339664/339667 co-relation queries the response was YES. [2024-06-04 16:03:17,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36488 conditions, 4966 events. 2941/4966 cut-off events. For 339664/339667 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 32772 event pairs, 569 based on Foata normal form. 14/4974 useless extension candidates. Maximal degree in co-relation 36329. Up to 4370 conditions per place. [2024-06-04 16:03:17,688 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 430 selfloop transitions, 69 changer transitions 0/505 dead transitions. [2024-06-04 16:03:17,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 505 transitions, 8822 flow [2024-06-04 16:03:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:03:17,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-04 16:03:17,689 INFO L175 Difference]: Start difference. First operand has 351 places, 473 transitions, 7653 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:03:17,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 505 transitions, 8822 flow [2024-06-04 16:03:18,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 505 transitions, 8525 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:18,917 INFO L231 Difference]: Finished difference. Result has 348 places, 475 transitions, 7572 flow [2024-06-04 16:03:18,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7356, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7572, PETRI_PLACES=348, PETRI_TRANSITIONS=475} [2024-06-04 16:03:18,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-04 16:03:18,918 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 475 transitions, 7572 flow [2024-06-04 16:03:18,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:18,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:18,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:18,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 16:03:18,919 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:18,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:18,919 INFO L85 PathProgramCache]: Analyzing trace with hash -214751965, now seen corresponding path program 5 times [2024-06-04 16:03:18,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:18,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856709074] [2024-06-04 16:03:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:18,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:19,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:19,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856709074] [2024-06-04 16:03:19,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856709074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:19,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:19,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:19,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866119370] [2024-06-04 16:03:19,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:19,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:19,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:19,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:19,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:19,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 475 transitions, 7572 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:19,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:19,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:19,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:20,257 INFO L124 PetriNetUnfolderBase]: 2954/5001 cut-off events. [2024-06-04 16:03:20,257 INFO L125 PetriNetUnfolderBase]: For 316819/316827 co-relation queries the response was YES. [2024-06-04 16:03:20,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36668 conditions, 5001 events. 2954/5001 cut-off events. For 316819/316827 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33169 event pairs, 572 based on Foata normal form. 7/5003 useless extension candidates. Maximal degree in co-relation 36508. Up to 3997 conditions per place. [2024-06-04 16:03:20,326 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 275 selfloop transitions, 232 changer transitions 0/513 dead transitions. [2024-06-04 16:03:20,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 513 transitions, 9084 flow [2024-06-04 16:03:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:20,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-04 16:03:20,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:03:20,327 INFO L175 Difference]: Start difference. First operand has 348 places, 475 transitions, 7572 flow. Second operand 11 states and 242 transitions. [2024-06-04 16:03:20,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 513 transitions, 9084 flow [2024-06-04 16:03:21,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 513 transitions, 8933 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:21,622 INFO L231 Difference]: Finished difference. Result has 354 places, 481 transitions, 7993 flow [2024-06-04 16:03:21,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7421, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7993, PETRI_PLACES=354, PETRI_TRANSITIONS=481} [2024-06-04 16:03:21,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-04 16:03:21,623 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 481 transitions, 7993 flow [2024-06-04 16:03:21,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:21,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:21,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:21,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 16:03:21,623 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:21,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:21,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1008494369, now seen corresponding path program 6 times [2024-06-04 16:03:21,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:21,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354327376] [2024-06-04 16:03:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:21,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:21,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:21,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354327376] [2024-06-04 16:03:21,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354327376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:21,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:21,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:21,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754777227] [2024-06-04 16:03:21,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:21,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:21,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:21,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:22,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:22,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 481 transitions, 7993 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:22,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:22,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:22,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:23,037 INFO L124 PetriNetUnfolderBase]: 2959/5010 cut-off events. [2024-06-04 16:03:23,037 INFO L125 PetriNetUnfolderBase]: For 324320/324328 co-relation queries the response was YES. [2024-06-04 16:03:23,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37151 conditions, 5010 events. 2959/5010 cut-off events. For 324320/324328 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33243 event pairs, 574 based on Foata normal form. 7/5012 useless extension candidates. Maximal degree in co-relation 36990. Up to 4168 conditions per place. [2024-06-04 16:03:23,105 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 350 selfloop transitions, 164 changer transitions 0/520 dead transitions. [2024-06-04 16:03:23,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 520 transitions, 9710 flow [2024-06-04 16:03:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:23,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-04 16:03:23,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532150776053215 [2024-06-04 16:03:23,106 INFO L175 Difference]: Start difference. First operand has 354 places, 481 transitions, 7993 flow. Second operand 11 states and 240 transitions. [2024-06-04 16:03:23,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 520 transitions, 9710 flow [2024-06-04 16:03:24,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 520 transitions, 9223 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:24,315 INFO L231 Difference]: Finished difference. Result has 357 places, 484 transitions, 7905 flow [2024-06-04 16:03:24,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7515, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7905, PETRI_PLACES=357, PETRI_TRANSITIONS=484} [2024-06-04 16:03:24,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-04 16:03:24,316 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 484 transitions, 7905 flow [2024-06-04 16:03:24,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:24,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:24,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:24,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 16:03:24,316 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:24,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash 812019117, now seen corresponding path program 7 times [2024-06-04 16:03:24,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:24,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690429494] [2024-06-04 16:03:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:24,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:24,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:24,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690429494] [2024-06-04 16:03:24,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690429494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:24,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:24,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:24,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706544353] [2024-06-04 16:03:24,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:24,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:24,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:24,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:24,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:24,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:24,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 484 transitions, 7905 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:24,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:24,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:24,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:25,692 INFO L124 PetriNetUnfolderBase]: 2956/5005 cut-off events. [2024-06-04 16:03:25,692 INFO L125 PetriNetUnfolderBase]: For 328278/328283 co-relation queries the response was YES. [2024-06-04 16:03:25,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36655 conditions, 5005 events. 2956/5005 cut-off events. For 328278/328283 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33241 event pairs, 590 based on Foata normal form. 5/5003 useless extension candidates. Maximal degree in co-relation 36494. Up to 4165 conditions per place. [2024-06-04 16:03:25,762 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 341 selfloop transitions, 168 changer transitions 0/515 dead transitions. [2024-06-04 16:03:25,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 515 transitions, 9380 flow [2024-06-04 16:03:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-04 16:03:25,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-04 16:03:25,763 INFO L175 Difference]: Start difference. First operand has 357 places, 484 transitions, 7905 flow. Second operand 10 states and 217 transitions. [2024-06-04 16:03:25,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 515 transitions, 9380 flow [2024-06-04 16:03:27,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 515 transitions, 9175 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:27,009 INFO L231 Difference]: Finished difference. Result has 363 places, 488 transitions, 8154 flow [2024-06-04 16:03:27,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7700, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8154, PETRI_PLACES=363, PETRI_TRANSITIONS=488} [2024-06-04 16:03:27,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-04 16:03:27,009 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 488 transitions, 8154 flow [2024-06-04 16:03:27,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:27,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:27,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:27,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 16:03:27,010 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:27,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:27,010 INFO L85 PathProgramCache]: Analyzing trace with hash -897660689, now seen corresponding path program 8 times [2024-06-04 16:03:27,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:27,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518802813] [2024-06-04 16:03:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:27,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:27,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:27,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518802813] [2024-06-04 16:03:27,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518802813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:27,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:27,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:27,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449454833] [2024-06-04 16:03:27,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:27,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:27,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:27,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:27,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:27,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:27,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 488 transitions, 8154 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:27,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:27,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:27,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:28,274 INFO L124 PetriNetUnfolderBase]: 2953/5002 cut-off events. [2024-06-04 16:03:28,275 INFO L125 PetriNetUnfolderBase]: For 333220/333228 co-relation queries the response was YES. [2024-06-04 16:03:28,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36821 conditions, 5002 events. 2953/5002 cut-off events. For 333220/333228 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33247 event pairs, 574 based on Foata normal form. 7/5004 useless extension candidates. Maximal degree in co-relation 36658. Up to 4162 conditions per place. [2024-06-04 16:03:28,341 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 341 selfloop transitions, 171 changer transitions 0/518 dead transitions. [2024-06-04 16:03:28,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 518 transitions, 9430 flow [2024-06-04 16:03:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-04 16:03:28,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-04 16:03:28,343 INFO L175 Difference]: Start difference. First operand has 363 places, 488 transitions, 8154 flow. Second operand 11 states and 239 transitions. [2024-06-04 16:03:28,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 518 transitions, 9430 flow [2024-06-04 16:03:29,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 518 transitions, 9199 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:29,722 INFO L231 Difference]: Finished difference. Result has 368 places, 488 transitions, 8271 flow [2024-06-04 16:03:29,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7923, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8271, PETRI_PLACES=368, PETRI_TRANSITIONS=488} [2024-06-04 16:03:29,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-04 16:03:29,722 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 488 transitions, 8271 flow [2024-06-04 16:03:29,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:29,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:29,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:29,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 16:03:29,723 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:29,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:29,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1180263509, now seen corresponding path program 9 times [2024-06-04 16:03:29,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:29,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066038349] [2024-06-04 16:03:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:29,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:30,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:30,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066038349] [2024-06-04 16:03:30,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066038349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:30,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:30,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:30,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609114886] [2024-06-04 16:03:30,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:30,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:30,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:30,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:30,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:30,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:30,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 488 transitions, 8271 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:30,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:30,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:30,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:31,077 INFO L124 PetriNetUnfolderBase]: 2963/5020 cut-off events. [2024-06-04 16:03:31,077 INFO L125 PetriNetUnfolderBase]: For 345746/345754 co-relation queries the response was YES. [2024-06-04 16:03:31,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37096 conditions, 5020 events. 2963/5020 cut-off events. For 345746/345754 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 33382 event pairs, 595 based on Foata normal form. 8/5023 useless extension candidates. Maximal degree in co-relation 36932. Up to 4308 conditions per place. [2024-06-04 16:03:31,148 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 387 selfloop transitions, 121 changer transitions 0/514 dead transitions. [2024-06-04 16:03:31,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 514 transitions, 9623 flow [2024-06-04 16:03:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 16:03:31,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:03:31,149 INFO L175 Difference]: Start difference. First operand has 368 places, 488 transitions, 8271 flow. Second operand 6 states and 144 transitions. [2024-06-04 16:03:31,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 514 transitions, 9623 flow [2024-06-04 16:03:32,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 514 transitions, 9211 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-04 16:03:32,772 INFO L231 Difference]: Finished difference. Result has 363 places, 494 transitions, 8233 flow [2024-06-04 16:03:32,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7865, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8233, PETRI_PLACES=363, PETRI_TRANSITIONS=494} [2024-06-04 16:03:32,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-04 16:03:32,773 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 494 transitions, 8233 flow [2024-06-04 16:03:32,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:32,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:32,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:32,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 16:03:32,773 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:32,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:32,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1180257929, now seen corresponding path program 10 times [2024-06-04 16:03:32,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:32,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836738001] [2024-06-04 16:03:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:32,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:33,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:33,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836738001] [2024-06-04 16:03:33,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836738001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:33,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:33,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:33,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823294613] [2024-06-04 16:03:33,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:33,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:33,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:33,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:33,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:33,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 494 transitions, 8233 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:33,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:33,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:33,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:34,201 INFO L124 PetriNetUnfolderBase]: 2957/5012 cut-off events. [2024-06-04 16:03:34,201 INFO L125 PetriNetUnfolderBase]: For 344428/344436 co-relation queries the response was YES. [2024-06-04 16:03:34,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36782 conditions, 5012 events. 2957/5012 cut-off events. For 344428/344436 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 33345 event pairs, 595 based on Foata normal form. 8/5015 useless extension candidates. Maximal degree in co-relation 36617. Up to 4302 conditions per place. [2024-06-04 16:03:34,269 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 381 selfloop transitions, 129 changer transitions 0/516 dead transitions. [2024-06-04 16:03:34,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 516 transitions, 9477 flow [2024-06-04 16:03:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:34,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 16:03:34,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-04 16:03:34,270 INFO L175 Difference]: Start difference. First operand has 363 places, 494 transitions, 8233 flow. Second operand 8 states and 179 transitions. [2024-06-04 16:03:34,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 516 transitions, 9477 flow [2024-06-04 16:03:35,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 516 transitions, 9186 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:35,675 INFO L231 Difference]: Finished difference. Result has 367 places, 494 transitions, 8210 flow [2024-06-04 16:03:35,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7942, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8210, PETRI_PLACES=367, PETRI_TRANSITIONS=494} [2024-06-04 16:03:35,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-04 16:03:35,676 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 494 transitions, 8210 flow [2024-06-04 16:03:35,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:35,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:35,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:35,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 16:03:35,676 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:35,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1459580907, now seen corresponding path program 11 times [2024-06-04 16:03:35,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:35,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105946657] [2024-06-04 16:03:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:35,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:36,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:36,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105946657] [2024-06-04 16:03:36,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105946657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:36,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:36,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:36,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589378418] [2024-06-04 16:03:36,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:36,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:36,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:36,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:36,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:36,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:36,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 494 transitions, 8210 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:36,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:36,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:36,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:37,084 INFO L124 PetriNetUnfolderBase]: 2967/5030 cut-off events. [2024-06-04 16:03:37,084 INFO L125 PetriNetUnfolderBase]: For 351420/351428 co-relation queries the response was YES. [2024-06-04 16:03:37,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36956 conditions, 5030 events. 2967/5030 cut-off events. For 351420/351428 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33519 event pairs, 589 based on Foata normal form. 8/5033 useless extension candidates. Maximal degree in co-relation 36790. Up to 4099 conditions per place. [2024-06-04 16:03:37,149 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 238 changer transitions 0/525 dead transitions. [2024-06-04 16:03:37,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 525 transitions, 9758 flow [2024-06-04 16:03:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-04 16:03:37,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-04 16:03:37,150 INFO L175 Difference]: Start difference. First operand has 367 places, 494 transitions, 8210 flow. Second operand 10 states and 222 transitions. [2024-06-04 16:03:37,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 525 transitions, 9758 flow [2024-06-04 16:03:38,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 525 transitions, 9471 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:38,698 INFO L231 Difference]: Finished difference. Result has 370 places, 500 transitions, 8515 flow [2024-06-04 16:03:38,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7923, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8515, PETRI_PLACES=370, PETRI_TRANSITIONS=500} [2024-06-04 16:03:38,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-04 16:03:38,698 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 500 transitions, 8515 flow [2024-06-04 16:03:38,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:38,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:38,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:38,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 16:03:38,698 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:38,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:38,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1459396767, now seen corresponding path program 12 times [2024-06-04 16:03:38,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:38,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608854403] [2024-06-04 16:03:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:38,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:39,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:39,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608854403] [2024-06-04 16:03:39,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608854403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:39,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:39,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:39,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295079785] [2024-06-04 16:03:39,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:39,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:39,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:39,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:39,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:39,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:39,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 500 transitions, 8515 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:39,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:39,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:39,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:40,041 INFO L124 PetriNetUnfolderBase]: 2977/5050 cut-off events. [2024-06-04 16:03:40,041 INFO L125 PetriNetUnfolderBase]: For 360344/360352 co-relation queries the response was YES. [2024-06-04 16:03:40,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37454 conditions, 5050 events. 2977/5050 cut-off events. For 360344/360352 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33687 event pairs, 595 based on Foata normal form. 8/5053 useless extension candidates. Maximal degree in co-relation 37287. Up to 4111 conditions per place. [2024-06-04 16:03:40,114 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 308 selfloop transitions, 217 changer transitions 0/531 dead transitions. [2024-06-04 16:03:40,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 531 transitions, 10093 flow [2024-06-04 16:03:40,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:03:40,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-04 16:03:40,115 INFO L175 Difference]: Start difference. First operand has 370 places, 500 transitions, 8515 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:03:40,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 531 transitions, 10093 flow [2024-06-04 16:03:41,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 531 transitions, 9522 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:41,593 INFO L231 Difference]: Finished difference. Result has 370 places, 506 transitions, 8512 flow [2024-06-04 16:03:41,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7956, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8512, PETRI_PLACES=370, PETRI_TRANSITIONS=506} [2024-06-04 16:03:41,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-04 16:03:41,594 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 506 transitions, 8512 flow [2024-06-04 16:03:41,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:41,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:41,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:41,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 16:03:41,594 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:41,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:41,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1459407927, now seen corresponding path program 13 times [2024-06-04 16:03:41,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:41,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398368054] [2024-06-04 16:03:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:41,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:41,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:41,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398368054] [2024-06-04 16:03:41,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398368054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:41,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:41,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:41,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274615852] [2024-06-04 16:03:41,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:41,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:41,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:41,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:41,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:41,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:41,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 506 transitions, 8512 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:41,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:41,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:41,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:42,962 INFO L124 PetriNetUnfolderBase]: 2971/5040 cut-off events. [2024-06-04 16:03:42,962 INFO L125 PetriNetUnfolderBase]: For 358009/358017 co-relation queries the response was YES. [2024-06-04 16:03:43,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37222 conditions, 5040 events. 2971/5040 cut-off events. For 358009/358017 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33657 event pairs, 595 based on Foata normal form. 8/5043 useless extension candidates. Maximal degree in co-relation 37054. Up to 4105 conditions per place. [2024-06-04 16:03:43,041 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 300 selfloop transitions, 221 changer transitions 0/527 dead transitions. [2024-06-04 16:03:43,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 527 transitions, 9782 flow [2024-06-04 16:03:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:03:43,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-04 16:03:43,043 INFO L175 Difference]: Start difference. First operand has 370 places, 506 transitions, 8512 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:03:43,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 527 transitions, 9782 flow [2024-06-04 16:03:44,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 527 transitions, 9288 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:44,625 INFO L231 Difference]: Finished difference. Result has 372 places, 506 transitions, 8470 flow [2024-06-04 16:03:44,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8018, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8470, PETRI_PLACES=372, PETRI_TRANSITIONS=506} [2024-06-04 16:03:44,626 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-04 16:03:44,626 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 506 transitions, 8470 flow [2024-06-04 16:03:44,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:44,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:44,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:44,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 16:03:44,626 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:44,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:44,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1459575327, now seen corresponding path program 14 times [2024-06-04 16:03:44,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:44,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064548241] [2024-06-04 16:03:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:44,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:44,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:44,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064548241] [2024-06-04 16:03:44,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064548241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:44,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:44,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:44,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608862773] [2024-06-04 16:03:44,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:44,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:44,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:44,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:44,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:45,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:45,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 506 transitions, 8470 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:45,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:45,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:45,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:46,155 INFO L124 PetriNetUnfolderBase]: 2965/5032 cut-off events. [2024-06-04 16:03:46,156 INFO L125 PetriNetUnfolderBase]: For 356660/356668 co-relation queries the response was YES. [2024-06-04 16:03:46,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37015 conditions, 5032 events. 2965/5032 cut-off events. For 356660/356668 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33588 event pairs, 589 based on Foata normal form. 8/5035 useless extension candidates. Maximal degree in co-relation 36846. Up to 4099 conditions per place. [2024-06-04 16:03:46,219 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 246 changer transitions 0/530 dead transitions. [2024-06-04 16:03:46,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 530 transitions, 9576 flow [2024-06-04 16:03:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:46,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-04 16:03:46,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-04 16:03:46,220 INFO L175 Difference]: Start difference. First operand has 372 places, 506 transitions, 8470 flow. Second operand 11 states and 236 transitions. [2024-06-04 16:03:46,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 530 transitions, 9576 flow [2024-06-04 16:03:47,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 530 transitions, 9002 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:47,886 INFO L231 Difference]: Finished difference. Result has 376 places, 506 transitions, 8398 flow [2024-06-04 16:03:47,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7896, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8398, PETRI_PLACES=376, PETRI_TRANSITIONS=506} [2024-06-04 16:03:47,886 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-04 16:03:47,886 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 506 transitions, 8398 flow [2024-06-04 16:03:47,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:47,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:47,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:47,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 16:03:47,887 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:47,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:47,887 INFO L85 PathProgramCache]: Analyzing trace with hash -806087513, now seen corresponding path program 15 times [2024-06-04 16:03:47,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:47,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054137698] [2024-06-04 16:03:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:47,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:48,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:48,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054137698] [2024-06-04 16:03:48,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054137698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:48,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:48,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:48,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781203025] [2024-06-04 16:03:48,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:48,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:48,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:48,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:48,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:48,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:48,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 506 transitions, 8398 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:48,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:48,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:48,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:49,230 INFO L124 PetriNetUnfolderBase]: 2962/5026 cut-off events. [2024-06-04 16:03:49,230 INFO L125 PetriNetUnfolderBase]: For 354722/354725 co-relation queries the response was YES. [2024-06-04 16:03:49,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36924 conditions, 5026 events. 2962/5026 cut-off events. For 354722/354725 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33546 event pairs, 627 based on Foata normal form. 3/5021 useless extension candidates. Maximal degree in co-relation 36754. Up to 4032 conditions per place. [2024-06-04 16:03:49,306 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 271 changer transitions 0/523 dead transitions. [2024-06-04 16:03:49,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 523 transitions, 9472 flow [2024-06-04 16:03:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-04 16:03:49,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-04 16:03:49,307 INFO L175 Difference]: Start difference. First operand has 376 places, 506 transitions, 8398 flow. Second operand 10 states and 211 transitions. [2024-06-04 16:03:49,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 523 transitions, 9472 flow [2024-06-04 16:03:51,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 523 transitions, 8832 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-04 16:03:51,062 INFO L231 Difference]: Finished difference. Result has 375 places, 506 transitions, 8306 flow [2024-06-04 16:03:51,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7758, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8306, PETRI_PLACES=375, PETRI_TRANSITIONS=506} [2024-06-04 16:03:51,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-04 16:03:51,063 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 506 transitions, 8306 flow [2024-06-04 16:03:51,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:51,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:51,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:51,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 16:03:51,063 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:51,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:51,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1823543534, now seen corresponding path program 4 times [2024-06-04 16:03:51,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:51,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955852681] [2024-06-04 16:03:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:51,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:51,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:51,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955852681] [2024-06-04 16:03:51,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955852681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:51,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:51,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:51,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947253549] [2024-06-04 16:03:51,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:51,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:51,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:51,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:51,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:51,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 506 transitions, 8306 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:51,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:51,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:51,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:52,611 INFO L124 PetriNetUnfolderBase]: 3042/5125 cut-off events. [2024-06-04 16:03:52,612 INFO L125 PetriNetUnfolderBase]: For 417975/417975 co-relation queries the response was YES. [2024-06-04 16:03:52,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39177 conditions, 5125 events. 3042/5125 cut-off events. For 417975/417975 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 34008 event pairs, 559 based on Foata normal form. 2/5115 useless extension candidates. Maximal degree in co-relation 39006. Up to 4275 conditions per place. [2024-06-04 16:03:52,698 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 393 selfloop transitions, 145 changer transitions 0/544 dead transitions. [2024-06-04 16:03:52,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 544 transitions, 9843 flow [2024-06-04 16:03:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:52,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-04 16:03:52,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-04 16:03:52,699 INFO L175 Difference]: Start difference. First operand has 375 places, 506 transitions, 8306 flow. Second operand 10 states and 222 transitions. [2024-06-04 16:03:52,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 544 transitions, 9843 flow [2024-06-04 16:03:54,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 544 transitions, 9215 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:54,267 INFO L231 Difference]: Finished difference. Result has 376 places, 512 transitions, 8182 flow [2024-06-04 16:03:54,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7678, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8182, PETRI_PLACES=376, PETRI_TRANSITIONS=512} [2024-06-04 16:03:54,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-04 16:03:54,268 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 512 transitions, 8182 flow [2024-06-04 16:03:54,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:54,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:54,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:54,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 16:03:54,268 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:54,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:54,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1413073466, now seen corresponding path program 5 times [2024-06-04 16:03:54,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:54,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472148064] [2024-06-04 16:03:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:54,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:54,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:54,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472148064] [2024-06-04 16:03:54,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472148064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:54,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:54,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:54,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365755247] [2024-06-04 16:03:54,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:54,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:54,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:54,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:54,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 512 transitions, 8182 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:54,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:54,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:54,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:55,685 INFO L124 PetriNetUnfolderBase]: 3037/5134 cut-off events. [2024-06-04 16:03:55,685 INFO L125 PetriNetUnfolderBase]: For 417492/417492 co-relation queries the response was YES. [2024-06-04 16:03:55,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38971 conditions, 5134 events. 3037/5134 cut-off events. For 417492/417492 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 34211 event pairs, 576 based on Foata normal form. 2/5130 useless extension candidates. Maximal degree in co-relation 38798. Up to 4436 conditions per place. [2024-06-04 16:03:55,758 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 399 selfloop transitions, 131 changer transitions 0/536 dead transitions. [2024-06-04 16:03:55,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 536 transitions, 9300 flow [2024-06-04 16:03:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-04 16:03:55,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-04 16:03:55,759 INFO L175 Difference]: Start difference. First operand has 376 places, 512 transitions, 8182 flow. Second operand 10 states and 214 transitions. [2024-06-04 16:03:55,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 536 transitions, 9300 flow [2024-06-04 16:03:57,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 536 transitions, 8993 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:57,586 INFO L231 Difference]: Finished difference. Result has 379 places, 512 transitions, 8145 flow [2024-06-04 16:03:57,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7875, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8145, PETRI_PLACES=379, PETRI_TRANSITIONS=512} [2024-06-04 16:03:57,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-04 16:03:57,587 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 512 transitions, 8145 flow [2024-06-04 16:03:57,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:57,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:57,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:57,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 16:03:57,588 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:57,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:57,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1840903372, now seen corresponding path program 6 times [2024-06-04 16:03:57,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:57,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123977064] [2024-06-04 16:03:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:57,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:57,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:57,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123977064] [2024-06-04 16:03:57,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123977064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:57,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:57,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:57,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986525330] [2024-06-04 16:03:57,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:57,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:57,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:57,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:58,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:58,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 512 transitions, 8145 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:58,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:58,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:58,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:59,094 INFO L124 PetriNetUnfolderBase]: 3163/5325 cut-off events. [2024-06-04 16:03:59,095 INFO L125 PetriNetUnfolderBase]: For 504894/504902 co-relation queries the response was YES. [2024-06-04 16:03:59,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42285 conditions, 5325 events. 3163/5325 cut-off events. For 504894/504902 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 35406 event pairs, 635 based on Foata normal form. 8/5327 useless extension candidates. Maximal degree in co-relation 42111. Up to 4486 conditions per place. [2024-06-04 16:03:59,177 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 425 selfloop transitions, 116 changer transitions 0/547 dead transitions. [2024-06-04 16:03:59,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 547 transitions, 9682 flow [2024-06-04 16:03:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-04 16:03:59,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-04 16:03:59,178 INFO L175 Difference]: Start difference. First operand has 379 places, 512 transitions, 8145 flow. Second operand 10 states and 216 transitions. [2024-06-04 16:03:59,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 547 transitions, 9682 flow [2024-06-04 16:04:01,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 547 transitions, 9381 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-04 16:04:01,218 INFO L231 Difference]: Finished difference. Result has 381 places, 518 transitions, 8276 flow [2024-06-04 16:04:01,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7846, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8276, PETRI_PLACES=381, PETRI_TRANSITIONS=518} [2024-06-04 16:04:01,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-04 16:04:01,219 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 518 transitions, 8276 flow [2024-06-04 16:04:01,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:01,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:01,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:01,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 16:04:01,219 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:01,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:01,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1938952814, now seen corresponding path program 7 times [2024-06-04 16:04:01,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:01,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102018346] [2024-06-04 16:04:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:01,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:01,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:01,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102018346] [2024-06-04 16:04:01,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102018346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:01,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:01,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:01,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682476012] [2024-06-04 16:04:01,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:01,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:01,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:01,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:01,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:01,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:01,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 518 transitions, 8276 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:01,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:01,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:01,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:02,706 INFO L124 PetriNetUnfolderBase]: 3140/5280 cut-off events. [2024-06-04 16:04:02,706 INFO L125 PetriNetUnfolderBase]: For 496351/496354 co-relation queries the response was YES. [2024-06-04 16:04:02,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41206 conditions, 5280 events. 3140/5280 cut-off events. For 496351/496354 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 35059 event pairs, 612 based on Foata normal form. 12/5286 useless extension candidates. Maximal degree in co-relation 41031. Up to 4583 conditions per place. [2024-06-04 16:04:02,781 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 452 selfloop transitions, 86 changer transitions 0/544 dead transitions. [2024-06-04 16:04:02,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 544 transitions, 9452 flow [2024-06-04 16:04:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 16:04:02,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:04:02,782 INFO L175 Difference]: Start difference. First operand has 381 places, 518 transitions, 8276 flow. Second operand 6 states and 150 transitions. [2024-06-04 16:04:02,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 544 transitions, 9452 flow [2024-06-04 16:04:04,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 544 transitions, 9167 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:04,833 INFO L231 Difference]: Finished difference. Result has 380 places, 518 transitions, 8186 flow [2024-06-04 16:04:04,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7991, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8186, PETRI_PLACES=380, PETRI_TRANSITIONS=518} [2024-06-04 16:04:04,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-04 16:04:04,833 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 518 transitions, 8186 flow [2024-06-04 16:04:04,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:04,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:04,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:04,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 16:04:04,834 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:04,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:04,834 INFO L85 PathProgramCache]: Analyzing trace with hash 69494640, now seen corresponding path program 8 times [2024-06-04 16:04:04,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:04,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544206336] [2024-06-04 16:04:04,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:04,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:05,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:05,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544206336] [2024-06-04 16:04:05,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544206336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:05,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:05,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:05,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838741577] [2024-06-04 16:04:05,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:05,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:05,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:05,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:05,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:05,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:05,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 518 transitions, 8186 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:05,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:05,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:05,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:06,301 INFO L124 PetriNetUnfolderBase]: 3148/5310 cut-off events. [2024-06-04 16:04:06,302 INFO L125 PetriNetUnfolderBase]: For 469845/469853 co-relation queries the response was YES. [2024-06-04 16:04:06,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41133 conditions, 5310 events. 3148/5310 cut-off events. For 469845/469853 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 35365 event pairs, 634 based on Foata normal form. 8/5313 useless extension candidates. Maximal degree in co-relation 40957. Up to 4611 conditions per place. [2024-06-04 16:04:06,375 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 425 selfloop transitions, 110 changer transitions 0/541 dead transitions. [2024-06-04 16:04:06,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 541 transitions, 9359 flow [2024-06-04 16:04:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:04:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:04:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-04 16:04:06,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-04 16:04:06,377 INFO L175 Difference]: Start difference. First operand has 380 places, 518 transitions, 8186 flow. Second operand 10 states and 208 transitions. [2024-06-04 16:04:06,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 541 transitions, 9359 flow [2024-06-04 16:04:08,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 541 transitions, 9173 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:08,576 INFO L231 Difference]: Finished difference. Result has 384 places, 520 transitions, 8282 flow [2024-06-04 16:04:08,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8000, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8282, PETRI_PLACES=384, PETRI_TRANSITIONS=520} [2024-06-04 16:04:08,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-04 16:04:08,577 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 520 transitions, 8282 flow [2024-06-04 16:04:08,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:08,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:08,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:08,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 16:04:08,577 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:08,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash -637848022, now seen corresponding path program 9 times [2024-06-04 16:04:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:08,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148608980] [2024-06-04 16:04:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:08,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:08,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:08,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148608980] [2024-06-04 16:04:08,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148608980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:08,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:08,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:08,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665411834] [2024-06-04 16:04:08,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:08,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:08,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:08,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:08,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:08,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 520 transitions, 8282 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:08,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:08,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:08,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:10,015 INFO L124 PetriNetUnfolderBase]: 3156/5322 cut-off events. [2024-06-04 16:04:10,015 INFO L125 PetriNetUnfolderBase]: For 469971/469979 co-relation queries the response was YES. [2024-06-04 16:04:10,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41292 conditions, 5322 events. 3156/5322 cut-off events. For 469971/469979 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35396 event pairs, 491 based on Foata normal form. 8/5325 useless extension candidates. Maximal degree in co-relation 41116. Up to 3573 conditions per place. [2024-06-04 16:04:10,093 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 414 selfloop transitions, 135 changer transitions 0/555 dead transitions. [2024-06-04 16:04:10,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 555 transitions, 9951 flow [2024-06-04 16:04:10,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-04 16:04:10,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-04 16:04:10,094 INFO L175 Difference]: Start difference. First operand has 384 places, 520 transitions, 8282 flow. Second operand 9 states and 204 transitions. [2024-06-04 16:04:10,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 555 transitions, 9951 flow [2024-06-04 16:04:12,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 555 transitions, 9696 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:12,235 INFO L231 Difference]: Finished difference. Result has 385 places, 522 transitions, 8353 flow [2024-06-04 16:04:12,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8027, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8353, PETRI_PLACES=385, PETRI_TRANSITIONS=522} [2024-06-04 16:04:12,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-04 16:04:12,235 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 522 transitions, 8353 flow [2024-06-04 16:04:12,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:12,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:12,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:12,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 16:04:12,236 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:12,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1131873988, now seen corresponding path program 10 times [2024-06-04 16:04:12,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:12,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580913041] [2024-06-04 16:04:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:12,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:12,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:12,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580913041] [2024-06-04 16:04:12,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580913041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:12,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:12,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:12,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688476089] [2024-06-04 16:04:12,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:12,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:12,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:12,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:12,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:12,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:12,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 522 transitions, 8353 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:12,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:12,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:12,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:13,652 INFO L124 PetriNetUnfolderBase]: 3131/5281 cut-off events. [2024-06-04 16:04:13,653 INFO L125 PetriNetUnfolderBase]: For 472656/472664 co-relation queries the response was YES. [2024-06-04 16:04:13,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40758 conditions, 5281 events. 3131/5281 cut-off events. For 472656/472664 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35184 event pairs, 527 based on Foata normal form. 14/5290 useless extension candidates. Maximal degree in co-relation 40581. Up to 3559 conditions per place. [2024-06-04 16:04:13,731 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 418 selfloop transitions, 128 changer transitions 0/552 dead transitions. [2024-06-04 16:04:13,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 552 transitions, 9769 flow [2024-06-04 16:04:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 16:04:13,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-04 16:04:13,732 INFO L175 Difference]: Start difference. First operand has 385 places, 522 transitions, 8353 flow. Second operand 9 states and 201 transitions. [2024-06-04 16:04:13,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 552 transitions, 9769 flow [2024-06-04 16:04:15,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 552 transitions, 9397 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:15,638 INFO L231 Difference]: Finished difference. Result has 386 places, 522 transitions, 8243 flow [2024-06-04 16:04:15,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7981, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8243, PETRI_PLACES=386, PETRI_TRANSITIONS=522} [2024-06-04 16:04:15,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-04 16:04:15,638 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 522 transitions, 8243 flow [2024-06-04 16:04:15,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:15,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:15,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:15,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 16:04:15,639 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:15,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:15,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2119118378, now seen corresponding path program 11 times [2024-06-04 16:04:15,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:15,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064610615] [2024-06-04 16:04:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:15,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:15,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:15,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064610615] [2024-06-04 16:04:15,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064610615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:15,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:15,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:15,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146279376] [2024-06-04 16:04:15,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:15,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:15,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:15,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:16,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:16,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 522 transitions, 8243 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:16,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:16,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:16,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:17,069 INFO L124 PetriNetUnfolderBase]: 3108/5246 cut-off events. [2024-06-04 16:04:17,069 INFO L125 PetriNetUnfolderBase]: For 442120/442128 co-relation queries the response was YES. [2024-06-04 16:04:17,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39157 conditions, 5246 events. 3108/5246 cut-off events. For 442120/442128 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34993 event pairs, 598 based on Foata normal form. 16/5257 useless extension candidates. Maximal degree in co-relation 38981. Up to 4273 conditions per place. [2024-06-04 16:04:17,150 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 435 selfloop transitions, 106 changer transitions 0/547 dead transitions. [2024-06-04 16:04:17,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 547 transitions, 9643 flow [2024-06-04 16:04:17,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-04 16:04:17,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-04 16:04:17,151 INFO L175 Difference]: Start difference. First operand has 386 places, 522 transitions, 8243 flow. Second operand 9 states and 197 transitions. [2024-06-04 16:04:17,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 547 transitions, 9643 flow [2024-06-04 16:04:19,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 547 transitions, 9366 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:19,271 INFO L231 Difference]: Finished difference. Result has 387 places, 522 transitions, 8185 flow [2024-06-04 16:04:19,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7966, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8185, PETRI_PLACES=387, PETRI_TRANSITIONS=522} [2024-06-04 16:04:19,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-04 16:04:19,271 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 522 transitions, 8185 flow [2024-06-04 16:04:19,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:19,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:19,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:19,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 16:04:19,272 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:19,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1781295900, now seen corresponding path program 12 times [2024-06-04 16:04:19,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:19,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753419089] [2024-06-04 16:04:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:19,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:19,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:19,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753419089] [2024-06-04 16:04:19,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753419089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:19,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:19,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:19,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591055922] [2024-06-04 16:04:19,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:19,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:19,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:19,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:19,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:19,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:19,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 522 transitions, 8185 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:19,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:19,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:19,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:20,661 INFO L124 PetriNetUnfolderBase]: 3078/5200 cut-off events. [2024-06-04 16:04:20,661 INFO L125 PetriNetUnfolderBase]: For 403576/403584 co-relation queries the response was YES. [2024-06-04 16:04:20,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37672 conditions, 5200 events. 3078/5200 cut-off events. For 403576/403584 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34733 event pairs, 604 based on Foata normal form. 16/5211 useless extension candidates. Maximal degree in co-relation 37495. Up to 4473 conditions per place. [2024-06-04 16:04:20,737 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 436 selfloop transitions, 100 changer transitions 0/542 dead transitions. [2024-06-04 16:04:20,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 542 transitions, 9339 flow [2024-06-04 16:04:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-04 16:04:20,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-04 16:04:20,738 INFO L175 Difference]: Start difference. First operand has 387 places, 522 transitions, 8185 flow. Second operand 9 states and 193 transitions. [2024-06-04 16:04:20,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 542 transitions, 9339 flow [2024-06-04 16:04:22,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 542 transitions, 9155 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 16:04:22,379 INFO L231 Difference]: Finished difference. Result has 391 places, 522 transitions, 8207 flow [2024-06-04 16:04:22,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8001, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8207, PETRI_PLACES=391, PETRI_TRANSITIONS=522} [2024-06-04 16:04:22,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-04 16:04:22,380 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 522 transitions, 8207 flow [2024-06-04 16:04:22,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:22,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:22,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:22,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 16:04:22,380 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:22,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1236212172, now seen corresponding path program 13 times [2024-06-04 16:04:22,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:22,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626204702] [2024-06-04 16:04:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:22,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:22,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:22,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626204702] [2024-06-04 16:04:22,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626204702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:22,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:22,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:22,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500456807] [2024-06-04 16:04:22,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:22,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:22,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:22,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:22,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:22,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:22,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 522 transitions, 8207 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:22,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:22,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:22,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:23,784 INFO L124 PetriNetUnfolderBase]: 3055/5162 cut-off events. [2024-06-04 16:04:23,784 INFO L125 PetriNetUnfolderBase]: For 363036/363044 co-relation queries the response was YES. [2024-06-04 16:04:23,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36262 conditions, 5162 events. 3055/5162 cut-off events. For 363036/363044 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34466 event pairs, 609 based on Foata normal form. 16/5173 useless extension candidates. Maximal degree in co-relation 36084. Up to 4446 conditions per place. [2024-06-04 16:04:23,855 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 447 selfloop transitions, 92 changer transitions 0/545 dead transitions. [2024-06-04 16:04:23,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 545 transitions, 9377 flow [2024-06-04 16:04:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:04:23,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:04:23,856 INFO L175 Difference]: Start difference. First operand has 391 places, 522 transitions, 8207 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:04:23,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 545 transitions, 9377 flow [2024-06-04 16:04:25,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 545 transitions, 9110 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-04 16:04:25,680 INFO L231 Difference]: Finished difference. Result has 388 places, 522 transitions, 8135 flow [2024-06-04 16:04:25,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7940, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8135, PETRI_PLACES=388, PETRI_TRANSITIONS=522} [2024-06-04 16:04:25,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-04 16:04:25,680 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 522 transitions, 8135 flow [2024-06-04 16:04:25,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:25,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:25,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:25,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 16:04:25,680 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:25,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1362746484, now seen corresponding path program 14 times [2024-06-04 16:04:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:25,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986560910] [2024-06-04 16:04:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:25,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:26,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:26,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986560910] [2024-06-04 16:04:26,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986560910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:26,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:26,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:26,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96497247] [2024-06-04 16:04:26,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:26,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:26,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:26,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:26,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:26,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:26,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 522 transitions, 8135 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:26,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:26,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:26,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:27,129 INFO L124 PetriNetUnfolderBase]: 3025/5119 cut-off events. [2024-06-04 16:04:27,129 INFO L125 PetriNetUnfolderBase]: For 318362/318370 co-relation queries the response was YES. [2024-06-04 16:04:27,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34745 conditions, 5119 events. 3025/5119 cut-off events. For 318362/318370 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34191 event pairs, 491 based on Foata normal form. 16/5130 useless extension candidates. Maximal degree in co-relation 34566. Up to 3935 conditions per place. [2024-06-04 16:04:27,206 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 441 selfloop transitions, 102 changer transitions 0/549 dead transitions. [2024-06-04 16:04:27,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 549 transitions, 9357 flow [2024-06-04 16:04:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:27,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 16:04:27,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:04:27,207 INFO L175 Difference]: Start difference. First operand has 388 places, 522 transitions, 8135 flow. Second operand 6 states and 150 transitions. [2024-06-04 16:04:27,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 549 transitions, 9357 flow [2024-06-04 16:04:28,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 549 transitions, 9138 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 16:04:28,982 INFO L231 Difference]: Finished difference. Result has 389 places, 522 transitions, 8131 flow [2024-06-04 16:04:28,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7916, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8131, PETRI_PLACES=389, PETRI_TRANSITIONS=522} [2024-06-04 16:04:28,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-04 16:04:28,982 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 522 transitions, 8131 flow [2024-06-04 16:04:28,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:28,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:28,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:28,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 16:04:28,983 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:28,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:28,983 INFO L85 PathProgramCache]: Analyzing trace with hash 288649004, now seen corresponding path program 1 times [2024-06-04 16:04:28,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:28,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945163786] [2024-06-04 16:04:28,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:28,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:29,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:29,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945163786] [2024-06-04 16:04:29,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945163786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:29,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:29,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:04:29,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406743553] [2024-06-04 16:04:29,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:29,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:04:29,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:29,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:04:29,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:04:29,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:29,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 522 transitions, 8131 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:29,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:29,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:29,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:30,429 INFO L124 PetriNetUnfolderBase]: 3164/5325 cut-off events. [2024-06-04 16:04:30,429 INFO L125 PetriNetUnfolderBase]: For 379570/379570 co-relation queries the response was YES. [2024-06-04 16:04:30,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37834 conditions, 5325 events. 3164/5325 cut-off events. For 379570/379570 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35463 event pairs, 504 based on Foata normal form. 6/5321 useless extension candidates. Maximal degree in co-relation 37654. Up to 3328 conditions per place. [2024-06-04 16:04:30,508 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 143 changer transitions 0/587 dead transitions. [2024-06-04 16:04:30,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 587 transitions, 10154 flow [2024-06-04 16:04:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:04:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:04:30,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-04 16:04:30,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587583148558758 [2024-06-04 16:04:30,509 INFO L175 Difference]: Start difference. First operand has 389 places, 522 transitions, 8131 flow. Second operand 11 states and 252 transitions. [2024-06-04 16:04:30,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 587 transitions, 10154 flow [2024-06-04 16:04:32,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 587 transitions, 9872 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:32,127 INFO L231 Difference]: Finished difference. Result has 395 places, 532 transitions, 8399 flow [2024-06-04 16:04:32,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7861, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8399, PETRI_PLACES=395, PETRI_TRANSITIONS=532} [2024-06-04 16:04:32,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-04 16:04:32,127 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 532 transitions, 8399 flow [2024-06-04 16:04:32,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:32,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:32,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:32,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 16:04:32,128 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:32,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:32,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1248945200, now seen corresponding path program 1 times [2024-06-04 16:04:32,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:32,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526363557] [2024-06-04 16:04:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:32,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:32,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:32,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526363557] [2024-06-04 16:04:32,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526363557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:32,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:32,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:32,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930681155] [2024-06-04 16:04:32,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:32,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:32,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:32,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:32,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:32,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:32,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 532 transitions, 8399 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:32,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:32,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:32,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:33,663 INFO L124 PetriNetUnfolderBase]: 3271/5515 cut-off events. [2024-06-04 16:04:33,664 INFO L125 PetriNetUnfolderBase]: For 439762/439770 co-relation queries the response was YES. [2024-06-04 16:04:33,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40067 conditions, 5515 events. 3271/5515 cut-off events. For 439762/439770 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37100 event pairs, 529 based on Foata normal form. 12/5522 useless extension candidates. Maximal degree in co-relation 39885. Up to 4140 conditions per place. [2024-06-04 16:04:33,754 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 461 selfloop transitions, 108 changer transitions 0/575 dead transitions. [2024-06-04 16:04:33,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 575 transitions, 10169 flow [2024-06-04 16:04:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:33,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 16:04:33,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-04 16:04:33,755 INFO L175 Difference]: Start difference. First operand has 395 places, 532 transitions, 8399 flow. Second operand 8 states and 190 transitions. [2024-06-04 16:04:33,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 575 transitions, 10169 flow [2024-06-04 16:04:36,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 575 transitions, 9950 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 16:04:36,049 INFO L231 Difference]: Finished difference. Result has 399 places, 537 transitions, 8479 flow [2024-06-04 16:04:36,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8186, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8479, PETRI_PLACES=399, PETRI_TRANSITIONS=537} [2024-06-04 16:04:36,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-04 16:04:36,049 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 537 transitions, 8479 flow [2024-06-04 16:04:36,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:36,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:36,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:36,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 16:04:36,049 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:36,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash 117951224, now seen corresponding path program 2 times [2024-06-04 16:04:36,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:36,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778180761] [2024-06-04 16:04:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:36,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:36,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:36,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778180761] [2024-06-04 16:04:36,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778180761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:36,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:36,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:04:36,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891264821] [2024-06-04 16:04:36,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:36,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:04:36,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:36,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:04:36,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:04:36,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:36,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 537 transitions, 8479 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:36,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:36,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:36,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:37,766 INFO L124 PetriNetUnfolderBase]: 3291/5541 cut-off events. [2024-06-04 16:04:37,766 INFO L125 PetriNetUnfolderBase]: For 447160/447163 co-relation queries the response was YES. [2024-06-04 16:04:37,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40466 conditions, 5541 events. 3291/5541 cut-off events. For 447160/447163 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 37254 event pairs, 499 based on Foata normal form. 8/5541 useless extension candidates. Maximal degree in co-relation 40281. Up to 4460 conditions per place. [2024-06-04 16:04:37,980 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 439 selfloop transitions, 136 changer transitions 0/581 dead transitions. [2024-06-04 16:04:37,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 581 transitions, 9837 flow [2024-06-04 16:04:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-04 16:04:37,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-04 16:04:37,980 INFO L175 Difference]: Start difference. First operand has 399 places, 537 transitions, 8479 flow. Second operand 9 states and 215 transitions. [2024-06-04 16:04:37,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 581 transitions, 9837 flow [2024-06-04 16:04:40,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 581 transitions, 9724 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-04 16:04:40,052 INFO L231 Difference]: Finished difference. Result has 406 places, 538 transitions, 8666 flow [2024-06-04 16:04:40,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8366, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8666, PETRI_PLACES=406, PETRI_TRANSITIONS=538} [2024-06-04 16:04:40,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-04 16:04:40,053 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 538 transitions, 8666 flow [2024-06-04 16:04:40,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:40,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:40,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:40,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 16:04:40,054 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:40,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash -309499906, now seen corresponding path program 3 times [2024-06-04 16:04:40,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:40,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159816] [2024-06-04 16:04:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:40,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:40,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:40,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159816] [2024-06-04 16:04:40,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:40,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:40,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:04:40,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673221822] [2024-06-04 16:04:40,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:40,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:04:40,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:40,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:04:40,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:04:40,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:40,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 538 transitions, 8666 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:40,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:40,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:40,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:41,876 INFO L124 PetriNetUnfolderBase]: 3546/6000 cut-off events. [2024-06-04 16:04:41,877 INFO L125 PetriNetUnfolderBase]: For 758260/758263 co-relation queries the response was YES. [2024-06-04 16:04:41,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46560 conditions, 6000 events. 3546/6000 cut-off events. For 758260/758263 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 40763 event pairs, 504 based on Foata normal form. 38/6030 useless extension candidates. Maximal degree in co-relation 46373. Up to 4097 conditions per place. [2024-06-04 16:04:41,972 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 444 selfloop transitions, 142 changer transitions 7/599 dead transitions. [2024-06-04 16:04:41,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 599 transitions, 10451 flow [2024-06-04 16:04:41,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-04 16:04:41,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-04 16:04:41,974 INFO L175 Difference]: Start difference. First operand has 406 places, 538 transitions, 8666 flow. Second operand 9 states and 231 transitions. [2024-06-04 16:04:41,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 599 transitions, 10451 flow [2024-06-04 16:04:44,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 599 transitions, 10159 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:44,863 INFO L231 Difference]: Finished difference. Result has 408 places, 540 transitions, 8751 flow [2024-06-04 16:04:44,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8374, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8751, PETRI_PLACES=408, PETRI_TRANSITIONS=540} [2024-06-04 16:04:44,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-04 16:04:44,865 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 540 transitions, 8751 flow [2024-06-04 16:04:44,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:44,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:44,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:44,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 16:04:44,867 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:44,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash -309499720, now seen corresponding path program 2 times [2024-06-04 16:04:44,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:44,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073258699] [2024-06-04 16:04:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:44,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:45,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:45,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073258699] [2024-06-04 16:04:45,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073258699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:45,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:45,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:45,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794516580] [2024-06-04 16:04:45,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:45,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:45,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:45,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:45,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:45,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:45,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 540 transitions, 8751 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:45,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:45,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:45,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:46,502 INFO L124 PetriNetUnfolderBase]: 3528/5968 cut-off events. [2024-06-04 16:04:46,502 INFO L125 PetriNetUnfolderBase]: For 624844/624852 co-relation queries the response was YES. [2024-06-04 16:04:46,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46611 conditions, 5968 events. 3528/5968 cut-off events. For 624844/624852 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40491 event pairs, 591 based on Foata normal form. 12/5975 useless extension candidates. Maximal degree in co-relation 46423. Up to 4565 conditions per place. [2024-06-04 16:04:46,594 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 462 selfloop transitions, 109 changer transitions 0/577 dead transitions. [2024-06-04 16:04:46,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 577 transitions, 10479 flow [2024-06-04 16:04:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:04:46,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-04 16:04:46,595 INFO L175 Difference]: Start difference. First operand has 408 places, 540 transitions, 8751 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:04:46,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 577 transitions, 10479 flow [2024-06-04 16:04:49,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 577 transitions, 10244 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:49,592 INFO L231 Difference]: Finished difference. Result has 409 places, 541 transitions, 8767 flow [2024-06-04 16:04:49,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8524, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8767, PETRI_PLACES=409, PETRI_TRANSITIONS=541} [2024-06-04 16:04:49,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-04 16:04:49,593 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 541 transitions, 8767 flow [2024-06-04 16:04:49,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:49,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:49,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:49,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 16:04:49,593 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:49,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash 295320080, now seen corresponding path program 3 times [2024-06-04 16:04:49,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:49,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965572487] [2024-06-04 16:04:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:49,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:49,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:49,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965572487] [2024-06-04 16:04:49,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965572487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:49,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:49,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:49,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805824372] [2024-06-04 16:04:49,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:49,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:49,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:49,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:49,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:49,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:49,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 541 transitions, 8767 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:49,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:49,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:49,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:51,213 INFO L124 PetriNetUnfolderBase]: 3581/6051 cut-off events. [2024-06-04 16:04:51,214 INFO L125 PetriNetUnfolderBase]: For 643077/643085 co-relation queries the response was YES. [2024-06-04 16:04:51,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47781 conditions, 6051 events. 3581/6051 cut-off events. For 643077/643085 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 41105 event pairs, 636 based on Foata normal form. 12/6058 useless extension candidates. Maximal degree in co-relation 47592. Up to 4595 conditions per place. [2024-06-04 16:04:51,312 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 455 selfloop transitions, 114 changer transitions 0/575 dead transitions. [2024-06-04 16:04:51,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 575 transitions, 10483 flow [2024-06-04 16:04:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:04:51,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:04:51,312 INFO L175 Difference]: Start difference. First operand has 409 places, 541 transitions, 8767 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:04:51,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 575 transitions, 10483 flow [2024-06-04 16:04:54,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 575 transitions, 10263 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 16:04:54,279 INFO L231 Difference]: Finished difference. Result has 411 places, 543 transitions, 8823 flow [2024-06-04 16:04:54,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8554, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8823, PETRI_PLACES=411, PETRI_TRANSITIONS=543} [2024-06-04 16:04:54,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-04 16:04:54,280 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 543 transitions, 8823 flow [2024-06-04 16:04:54,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:54,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:54,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:54,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 16:04:54,280 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:54,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash -527716236, now seen corresponding path program 4 times [2024-06-04 16:04:54,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:54,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680423686] [2024-06-04 16:04:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:54,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:54,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:54,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680423686] [2024-06-04 16:04:54,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680423686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:54,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:54,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:04:54,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532507282] [2024-06-04 16:04:54,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:54,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:04:54,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:54,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:04:54,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:04:54,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:54,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 543 transitions, 8823 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:54,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:54,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:54,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:56,127 INFO L124 PetriNetUnfolderBase]: 3655/6170 cut-off events. [2024-06-04 16:04:56,127 INFO L125 PetriNetUnfolderBase]: For 694389/694389 co-relation queries the response was YES. [2024-06-04 16:04:56,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49550 conditions, 6170 events. 3655/6170 cut-off events. For 694389/694389 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 42163 event pairs, 860 based on Foata normal form. 8/6172 useless extension candidates. Maximal degree in co-relation 49361. Up to 5235 conditions per place. [2024-06-04 16:04:56,219 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 452 selfloop transitions, 137 changer transitions 0/595 dead transitions. [2024-06-04 16:04:56,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 595 transitions, 10520 flow [2024-06-04 16:04:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:04:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:04:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-04 16:04:56,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272045028142589 [2024-06-04 16:04:56,220 INFO L175 Difference]: Start difference. First operand has 411 places, 543 transitions, 8823 flow. Second operand 13 states and 281 transitions. [2024-06-04 16:04:56,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 595 transitions, 10520 flow [2024-06-04 16:04:59,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 595 transitions, 10350 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 16:04:59,275 INFO L231 Difference]: Finished difference. Result has 421 places, 545 transitions, 8997 flow [2024-06-04 16:04:59,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8659, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8997, PETRI_PLACES=421, PETRI_TRANSITIONS=545} [2024-06-04 16:04:59,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-04 16:04:59,276 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 545 transitions, 8997 flow [2024-06-04 16:04:59,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:59,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:59,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:59,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 16:04:59,276 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:59,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:59,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2036715916, now seen corresponding path program 5 times [2024-06-04 16:04:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:59,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262882685] [2024-06-04 16:04:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:59,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:59,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:59,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262882685] [2024-06-04 16:04:59,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262882685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:59,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:59,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:04:59,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346941443] [2024-06-04 16:04:59,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:59,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:04:59,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:59,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:04:59,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:04:59,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:59,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 545 transitions, 8997 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:59,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:59,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:59,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:01,265 INFO L124 PetriNetUnfolderBase]: 4028/6787 cut-off events. [2024-06-04 16:05:01,265 INFO L125 PetriNetUnfolderBase]: For 1060374/1060374 co-relation queries the response was YES. [2024-06-04 16:05:01,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60435 conditions, 6787 events. 4028/6787 cut-off events. For 1060374/1060374 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 46819 event pairs, 972 based on Foata normal form. 6/6785 useless extension candidates. Maximal degree in co-relation 60245. Up to 4738 conditions per place. [2024-06-04 16:05:01,363 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 253 selfloop transitions, 345 changer transitions 0/604 dead transitions. [2024-06-04 16:05:01,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 604 transitions, 10971 flow [2024-06-04 16:05:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:05:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:05:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 299 transitions. [2024-06-04 16:05:01,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:05:01,364 INFO L175 Difference]: Start difference. First operand has 421 places, 545 transitions, 8997 flow. Second operand 13 states and 299 transitions. [2024-06-04 16:05:01,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 604 transitions, 10971 flow [2024-06-04 16:05:04,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 604 transitions, 10784 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-04 16:05:04,274 INFO L231 Difference]: Finished difference. Result has 427 places, 549 transitions, 9659 flow [2024-06-04 16:05:04,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8810, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9659, PETRI_PLACES=427, PETRI_TRANSITIONS=549} [2024-06-04 16:05:04,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-04 16:05:04,275 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 549 transitions, 9659 flow [2024-06-04 16:05:04,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:04,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:04,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:04,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 16:05:04,275 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:04,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:04,275 INFO L85 PathProgramCache]: Analyzing trace with hash -943817268, now seen corresponding path program 4 times [2024-06-04 16:05:04,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:04,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057953220] [2024-06-04 16:05:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:04,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:04,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:04,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057953220] [2024-06-04 16:05:04,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057953220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:04,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:04,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:04,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167541428] [2024-06-04 16:05:04,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:04,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:04,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:04,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:04,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:04,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:04,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 549 transitions, 9659 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:04,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:04,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:04,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:06,337 INFO L124 PetriNetUnfolderBase]: 4094/6881 cut-off events. [2024-06-04 16:05:06,337 INFO L125 PetriNetUnfolderBase]: For 1129549/1129557 co-relation queries the response was YES. [2024-06-04 16:05:06,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63081 conditions, 6881 events. 4094/6881 cut-off events. For 1129549/1129557 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 47488 event pairs, 1118 based on Foata normal form. 12/6877 useless extension candidates. Maximal degree in co-relation 62887. Up to 5992 conditions per place. [2024-06-04 16:05:06,433 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 479 selfloop transitions, 97 changer transitions 0/582 dead transitions. [2024-06-04 16:05:06,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 582 transitions, 11173 flow [2024-06-04 16:05:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:05:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:05:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:05:06,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-04 16:05:06,434 INFO L175 Difference]: Start difference. First operand has 427 places, 549 transitions, 9659 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:05:06,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 582 transitions, 11173 flow [2024-06-04 16:05:09,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 582 transitions, 10466 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 16:05:09,738 INFO L231 Difference]: Finished difference. Result has 427 places, 551 transitions, 9206 flow [2024-06-04 16:05:09,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8952, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9206, PETRI_PLACES=427, PETRI_TRANSITIONS=551} [2024-06-04 16:05:09,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-04 16:05:09,739 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 551 transitions, 9206 flow [2024-06-04 16:05:09,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:09,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:09,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:09,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 16:05:09,739 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:09,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:09,739 INFO L85 PathProgramCache]: Analyzing trace with hash -669699336, now seen corresponding path program 6 times [2024-06-04 16:05:09,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:09,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070894466] [2024-06-04 16:05:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:09,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:10,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:10,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070894466] [2024-06-04 16:05:10,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070894466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:10,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:10,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:10,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435184035] [2024-06-04 16:05:10,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:10,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:10,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:10,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:10,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:10,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:10,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 551 transitions, 9206 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:10,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:10,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:10,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:11,880 INFO L124 PetriNetUnfolderBase]: 4022/6782 cut-off events. [2024-06-04 16:05:11,884 INFO L125 PetriNetUnfolderBase]: For 1110832/1110835 co-relation queries the response was YES. [2024-06-04 16:05:11,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58294 conditions, 6782 events. 4022/6782 cut-off events. For 1110832/1110835 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 46966 event pairs, 986 based on Foata normal form. 38/6810 useless extension candidates. Maximal degree in co-relation 58098. Up to 5721 conditions per place. [2024-06-04 16:05:11,978 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 463 selfloop transitions, 118 changer transitions 7/594 dead transitions. [2024-06-04 16:05:11,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 594 transitions, 10570 flow [2024-06-04 16:05:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:05:11,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:05:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 16:05:11,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-04 16:05:11,979 INFO L175 Difference]: Start difference. First operand has 427 places, 551 transitions, 9206 flow. Second operand 8 states and 202 transitions. [2024-06-04 16:05:11,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 594 transitions, 10570 flow [2024-06-04 16:05:16,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 594 transitions, 10370 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:05:16,080 INFO L231 Difference]: Finished difference. Result has 431 places, 550 transitions, 9233 flow [2024-06-04 16:05:16,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9006, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9233, PETRI_PLACES=431, PETRI_TRANSITIONS=550} [2024-06-04 16:05:16,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-04 16:05:16,081 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 550 transitions, 9233 flow [2024-06-04 16:05:16,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:16,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:16,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:16,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 16:05:16,081 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:16,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:16,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1123728006, now seen corresponding path program 7 times [2024-06-04 16:05:16,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:16,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292633169] [2024-06-04 16:05:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:16,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:16,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:16,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292633169] [2024-06-04 16:05:16,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292633169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:16,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:16,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:16,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288047623] [2024-06-04 16:05:16,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:16,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:16,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:16,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:16,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:16,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:16,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 550 transitions, 9233 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:16,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:16,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:16,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:18,106 INFO L124 PetriNetUnfolderBase]: 4020/6783 cut-off events. [2024-06-04 16:05:18,106 INFO L125 PetriNetUnfolderBase]: For 982292/982292 co-relation queries the response was YES. [2024-06-04 16:05:18,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58498 conditions, 6783 events. 4020/6783 cut-off events. For 982292/982292 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 46937 event pairs, 1057 based on Foata normal form. 8/6787 useless extension candidates. Maximal degree in co-relation 58301. Up to 5592 conditions per place. [2024-06-04 16:05:18,201 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 248 selfloop transitions, 337 changer transitions 0/591 dead transitions. [2024-06-04 16:05:18,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 591 transitions, 10564 flow [2024-06-04 16:05:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:05:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:05:18,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 299 transitions. [2024-06-04 16:05:18,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5209059233449478 [2024-06-04 16:05:18,202 INFO L175 Difference]: Start difference. First operand has 431 places, 550 transitions, 9233 flow. Second operand 14 states and 299 transitions. [2024-06-04 16:05:18,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 591 transitions, 10564 flow [2024-06-04 16:05:21,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 591 transitions, 10324 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 16:05:21,684 INFO L231 Difference]: Finished difference. Result has 437 places, 551 transitions, 9703 flow [2024-06-04 16:05:21,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8993, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9703, PETRI_PLACES=437, PETRI_TRANSITIONS=551} [2024-06-04 16:05:21,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-04 16:05:21,684 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 551 transitions, 9703 flow [2024-06-04 16:05:21,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:21,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:21,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:21,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 16:05:21,685 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:21,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1770894946, now seen corresponding path program 8 times [2024-06-04 16:05:21,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:21,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956636373] [2024-06-04 16:05:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:21,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:22,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:22,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956636373] [2024-06-04 16:05:22,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956636373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:22,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:22,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:22,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848377911] [2024-06-04 16:05:22,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:22,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:22,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:22,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:22,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:22,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:22,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 551 transitions, 9703 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:22,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:22,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:22,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:23,768 INFO L124 PetriNetUnfolderBase]: 3933/6649 cut-off events. [2024-06-04 16:05:23,768 INFO L125 PetriNetUnfolderBase]: For 940223/940226 co-relation queries the response was YES. [2024-06-04 16:05:23,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53888 conditions, 6649 events. 3933/6649 cut-off events. For 940223/940226 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 46069 event pairs, 1000 based on Foata normal form. 44/6685 useless extension candidates. Maximal degree in co-relation 53691. Up to 5597 conditions per place. [2024-06-04 16:05:23,865 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 458 selfloop transitions, 123 changer transitions 3/590 dead transitions. [2024-06-04 16:05:23,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 590 transitions, 11019 flow [2024-06-04 16:05:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:05:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:05:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 16:05:23,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-04 16:05:23,866 INFO L175 Difference]: Start difference. First operand has 437 places, 551 transitions, 9703 flow. Second operand 8 states and 199 transitions. [2024-06-04 16:05:23,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 590 transitions, 11019 flow [2024-06-04 16:05:27,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 590 transitions, 10260 flow, removed 12 selfloop flow, removed 15 redundant places. [2024-06-04 16:05:27,160 INFO L231 Difference]: Finished difference. Result has 430 places, 550 transitions, 9194 flow [2024-06-04 16:05:27,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9194, PETRI_PLACES=430, PETRI_TRANSITIONS=550} [2024-06-04 16:05:27,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-04 16:05:27,161 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 550 transitions, 9194 flow [2024-06-04 16:05:27,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:27,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:27,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:27,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 16:05:27,162 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:27,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:27,162 INFO L85 PathProgramCache]: Analyzing trace with hash -288083508, now seen corresponding path program 5 times [2024-06-04 16:05:27,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:27,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456925615] [2024-06-04 16:05:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:27,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:27,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:27,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456925615] [2024-06-04 16:05:27,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456925615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:27,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:27,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:27,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679271552] [2024-06-04 16:05:27,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:27,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:27,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:27,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:27,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:27,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 550 transitions, 9194 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:27,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:27,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:27,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:29,126 INFO L124 PetriNetUnfolderBase]: 3951/6689 cut-off events. [2024-06-04 16:05:29,126 INFO L125 PetriNetUnfolderBase]: For 768240/768248 co-relation queries the response was YES. [2024-06-04 16:05:29,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53524 conditions, 6689 events. 3951/6689 cut-off events. For 768240/768248 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 46402 event pairs, 1036 based on Foata normal form. 14/6698 useless extension candidates. Maximal degree in co-relation 53326. Up to 5903 conditions per place. [2024-06-04 16:05:29,219 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 476 selfloop transitions, 93 changer transitions 0/575 dead transitions. [2024-06-04 16:05:29,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 575 transitions, 10443 flow [2024-06-04 16:05:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:05:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:05:29,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-04 16:05:29,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-04 16:05:29,220 INFO L175 Difference]: Start difference. First operand has 430 places, 550 transitions, 9194 flow. Second operand 7 states and 162 transitions. [2024-06-04 16:05:29,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 575 transitions, 10443 flow [2024-06-04 16:05:32,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 575 transitions, 10181 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:32,804 INFO L231 Difference]: Finished difference. Result has 430 places, 551 transitions, 9146 flow [2024-06-04 16:05:32,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8932, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9146, PETRI_PLACES=430, PETRI_TRANSITIONS=551} [2024-06-04 16:05:32,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-04 16:05:32,804 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 551 transitions, 9146 flow [2024-06-04 16:05:32,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:32,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:32,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:32,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 16:05:32,804 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:32,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1753932370, now seen corresponding path program 6 times [2024-06-04 16:05:32,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:32,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447260760] [2024-06-04 16:05:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:32,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:33,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:33,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447260760] [2024-06-04 16:05:33,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447260760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:33,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:33,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:33,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102509860] [2024-06-04 16:05:33,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:33,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:33,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:33,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:33,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:33,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:33,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 551 transitions, 9146 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:33,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:33,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:33,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:34,860 INFO L124 PetriNetUnfolderBase]: 4071/6873 cut-off events. [2024-06-04 16:05:34,860 INFO L125 PetriNetUnfolderBase]: For 873116/873124 co-relation queries the response was YES. [2024-06-04 16:05:34,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56419 conditions, 6873 events. 4071/6873 cut-off events. For 873116/873124 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 47725 event pairs, 1060 based on Foata normal form. 14/6882 useless extension candidates. Maximal degree in co-relation 56220. Up to 5907 conditions per place. [2024-06-04 16:05:34,957 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 474 selfloop transitions, 100 changer transitions 0/580 dead transitions. [2024-06-04 16:05:34,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 580 transitions, 10694 flow [2024-06-04 16:05:34,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:05:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:05:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-04 16:05:34,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-04 16:05:34,958 INFO L175 Difference]: Start difference. First operand has 430 places, 551 transitions, 9146 flow. Second operand 7 states and 162 transitions. [2024-06-04 16:05:34,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 580 transitions, 10694 flow [2024-06-04 16:05:39,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 580 transitions, 10501 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 16:05:39,512 INFO L231 Difference]: Finished difference. Result has 433 places, 554 transitions, 9241 flow [2024-06-04 16:05:39,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8953, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9241, PETRI_PLACES=433, PETRI_TRANSITIONS=554} [2024-06-04 16:05:39,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-04 16:05:39,513 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 554 transitions, 9241 flow [2024-06-04 16:05:39,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:39,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:39,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:39,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 16:05:39,514 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:39,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1813022314, now seen corresponding path program 7 times [2024-06-04 16:05:39,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:39,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625158281] [2024-06-04 16:05:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:39,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:39,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:39,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625158281] [2024-06-04 16:05:39,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625158281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:39,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:39,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:39,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696920519] [2024-06-04 16:05:39,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:39,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:39,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:39,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:39,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:39,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:39,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 554 transitions, 9241 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:39,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:39,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:39,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:41,556 INFO L124 PetriNetUnfolderBase]: 4053/6847 cut-off events. [2024-06-04 16:05:41,557 INFO L125 PetriNetUnfolderBase]: For 844032/844040 co-relation queries the response was YES. [2024-06-04 16:05:41,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55694 conditions, 6847 events. 4053/6847 cut-off events. For 844032/844040 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 47611 event pairs, 1068 based on Foata normal form. 14/6856 useless extension candidates. Maximal degree in co-relation 55493. Up to 6061 conditions per place. [2024-06-04 16:05:41,655 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 472 selfloop transitions, 97 changer transitions 0/575 dead transitions. [2024-06-04 16:05:41,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 575 transitions, 10461 flow [2024-06-04 16:05:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:05:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:05:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-04 16:05:41,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-04 16:05:41,656 INFO L175 Difference]: Start difference. First operand has 433 places, 554 transitions, 9241 flow. Second operand 7 states and 158 transitions. [2024-06-04 16:05:41,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 575 transitions, 10461 flow [2024-06-04 16:05:45,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 575 transitions, 10263 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 16:05:45,934 INFO L231 Difference]: Finished difference. Result has 436 places, 554 transitions, 9242 flow [2024-06-04 16:05:45,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9043, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9242, PETRI_PLACES=436, PETRI_TRANSITIONS=554} [2024-06-04 16:05:45,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-04 16:05:45,935 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 554 transitions, 9242 flow [2024-06-04 16:05:45,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:45,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:45,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 16:05:45,935 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:45,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1942665042, now seen corresponding path program 9 times [2024-06-04 16:05:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:45,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386907003] [2024-06-04 16:05:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:46,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:46,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386907003] [2024-06-04 16:05:46,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386907003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:46,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:46,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:46,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069357110] [2024-06-04 16:05:46,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:46,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:46,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:46,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:46,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:46,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:46,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 554 transitions, 9242 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:46,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:46,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:46,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:48,021 INFO L124 PetriNetUnfolderBase]: 4127/6956 cut-off events. [2024-06-04 16:05:48,021 INFO L125 PetriNetUnfolderBase]: For 905890/905890 co-relation queries the response was YES. [2024-06-04 16:05:48,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57592 conditions, 6956 events. 4127/6956 cut-off events. For 905890/905890 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 48363 event pairs, 1048 based on Foata normal form. 8/6960 useless extension candidates. Maximal degree in co-relation 57390. Up to 6136 conditions per place. [2024-06-04 16:05:48,121 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 533 selfloop transitions, 60 changer transitions 0/599 dead transitions. [2024-06-04 16:05:48,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 599 transitions, 10884 flow [2024-06-04 16:05:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:05:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:05:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-06-04 16:05:48,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264227642276422 [2024-06-04 16:05:48,122 INFO L175 Difference]: Start difference. First operand has 436 places, 554 transitions, 9242 flow. Second operand 12 states and 259 transitions. [2024-06-04 16:05:48,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 599 transitions, 10884 flow [2024-06-04 16:05:52,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 599 transitions, 10683 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 16:05:52,530 INFO L231 Difference]: Finished difference. Result has 443 places, 556 transitions, 9233 flow [2024-06-04 16:05:52,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9041, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9233, PETRI_PLACES=443, PETRI_TRANSITIONS=556} [2024-06-04 16:05:52,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-04 16:05:52,530 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 556 transitions, 9233 flow [2024-06-04 16:05:52,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:52,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:52,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:52,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 16:05:52,531 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:52,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:52,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1608610332, now seen corresponding path program 10 times [2024-06-04 16:05:52,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:52,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868315763] [2024-06-04 16:05:52,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:52,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:52,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:52,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868315763] [2024-06-04 16:05:52,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868315763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:52,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:52,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:52,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044237032] [2024-06-04 16:05:52,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:52,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:52,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:52,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:52,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:52,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:52,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 556 transitions, 9233 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:52,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:52,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:52,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:54,775 INFO L124 PetriNetUnfolderBase]: 4374/7345 cut-off events. [2024-06-04 16:05:54,775 INFO L125 PetriNetUnfolderBase]: For 1179457/1179457 co-relation queries the response was YES. [2024-06-04 16:05:54,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65012 conditions, 7345 events. 4374/7345 cut-off events. For 1179457/1179457 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 51295 event pairs, 1163 based on Foata normal form. 8/7349 useless extension candidates. Maximal degree in co-relation 64809. Up to 6046 conditions per place. [2024-06-04 16:05:54,888 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 431 selfloop transitions, 176 changer transitions 0/613 dead transitions. [2024-06-04 16:05:54,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 613 transitions, 10989 flow [2024-06-04 16:05:54,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:05:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:05:54,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 329 transitions. [2024-06-04 16:05:54,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349593495934959 [2024-06-04 16:05:54,889 INFO L175 Difference]: Start difference. First operand has 443 places, 556 transitions, 9233 flow. Second operand 15 states and 329 transitions. [2024-06-04 16:05:54,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 613 transitions, 10989 flow [2024-06-04 16:05:59,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 613 transitions, 10903 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:59,407 INFO L231 Difference]: Finished difference. Result has 452 places, 559 transitions, 9631 flow [2024-06-04 16:05:59,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9147, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9631, PETRI_PLACES=452, PETRI_TRANSITIONS=559} [2024-06-04 16:05:59,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-04 16:05:59,408 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 559 transitions, 9631 flow [2024-06-04 16:05:59,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:59,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:59,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:59,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 16:05:59,408 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:59,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:59,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1074334000, now seen corresponding path program 11 times [2024-06-04 16:05:59,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:59,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525607883] [2024-06-04 16:05:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:59,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525607883] [2024-06-04 16:05:59,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525607883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:59,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:59,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:05:59,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872041569] [2024-06-04 16:05:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:59,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:05:59,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:05:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:05:59,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:59,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 559 transitions, 9631 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:59,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:59,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:59,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:01,550 INFO L124 PetriNetUnfolderBase]: 4402/7389 cut-off events. [2024-06-04 16:06:01,550 INFO L125 PetriNetUnfolderBase]: For 1202267/1202267 co-relation queries the response was YES. [2024-06-04 16:06:01,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66026 conditions, 7389 events. 4402/7389 cut-off events. For 1202267/1202267 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 51702 event pairs, 1183 based on Foata normal form. 8/7393 useless extension candidates. Maximal degree in co-relation 65820. Up to 6517 conditions per place. [2024-06-04 16:06:01,666 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 171 changer transitions 0/595 dead transitions. [2024-06-04 16:06:01,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 595 transitions, 10958 flow [2024-06-04 16:06:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:06:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:06:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-04 16:06:01,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345528455284553 [2024-06-04 16:06:01,667 INFO L175 Difference]: Start difference. First operand has 452 places, 559 transitions, 9631 flow. Second operand 12 states and 263 transitions. [2024-06-04 16:06:01,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 595 transitions, 10958 flow [2024-06-04 16:06:06,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 595 transitions, 10699 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-04 16:06:06,818 INFO L231 Difference]: Finished difference. Result has 454 places, 560 transitions, 9750 flow [2024-06-04 16:06:06,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9372, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9750, PETRI_PLACES=454, PETRI_TRANSITIONS=560} [2024-06-04 16:06:06,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-04 16:06:06,818 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 560 transitions, 9750 flow [2024-06-04 16:06:06,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:06,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:06,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:06,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 16:06:06,819 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:06,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:06,819 INFO L85 PathProgramCache]: Analyzing trace with hash 923660050, now seen corresponding path program 12 times [2024-06-04 16:06:06,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:06,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630223109] [2024-06-04 16:06:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:06,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:07,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:07,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630223109] [2024-06-04 16:06:07,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630223109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:07,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:07,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:07,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835051219] [2024-06-04 16:06:07,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:07,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:07,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:07,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:07,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:07,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 560 transitions, 9750 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:07,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:07,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:07,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:09,227 INFO L124 PetriNetUnfolderBase]: 4821/8076 cut-off events. [2024-06-04 16:06:09,227 INFO L125 PetriNetUnfolderBase]: For 1695972/1695972 co-relation queries the response was YES. [2024-06-04 16:06:09,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79342 conditions, 8076 events. 4821/8076 cut-off events. For 1695972/1695972 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 56976 event pairs, 1293 based on Foata normal form. 6/8076 useless extension candidates. Maximal degree in co-relation 79134. Up to 5781 conditions per place. [2024-06-04 16:06:09,361 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 181 changer transitions 0/616 dead transitions. [2024-06-04 16:06:09,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 616 transitions, 11829 flow [2024-06-04 16:06:09,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:06:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:06:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 276 transitions. [2024-06-04 16:06:09,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:06:09,362 INFO L175 Difference]: Start difference. First operand has 454 places, 560 transitions, 9750 flow. Second operand 12 states and 276 transitions. [2024-06-04 16:06:09,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 616 transitions, 11829 flow [2024-06-04 16:06:15,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 616 transitions, 11480 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-04 16:06:15,741 INFO L231 Difference]: Finished difference. Result has 458 places, 565 transitions, 9994 flow [2024-06-04 16:06:15,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9401, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9994, PETRI_PLACES=458, PETRI_TRANSITIONS=565} [2024-06-04 16:06:15,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-04 16:06:15,741 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 565 transitions, 9994 flow [2024-06-04 16:06:15,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:15,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:15,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:15,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 16:06:15,742 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:15,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:15,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1686094166, now seen corresponding path program 8 times [2024-06-04 16:06:15,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:15,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609323212] [2024-06-04 16:06:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:15,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:16,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:16,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609323212] [2024-06-04 16:06:16,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609323212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:16,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:16,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:16,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848365647] [2024-06-04 16:06:16,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:16,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:16,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:16,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:16,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:16,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:16,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 565 transitions, 9994 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:16,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:16,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:16,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:18,027 INFO L124 PetriNetUnfolderBase]: 4885/8175 cut-off events. [2024-06-04 16:06:18,028 INFO L125 PetriNetUnfolderBase]: For 1732873/1732881 co-relation queries the response was YES. [2024-06-04 16:06:18,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80777 conditions, 8175 events. 4885/8175 cut-off events. For 1732873/1732881 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 57731 event pairs, 1116 based on Foata normal form. 12/8182 useless extension candidates. Maximal degree in co-relation 80566. Up to 6915 conditions per place. [2024-06-04 16:06:18,171 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 498 selfloop transitions, 98 changer transitions 0/602 dead transitions. [2024-06-04 16:06:18,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 602 transitions, 11672 flow [2024-06-04 16:06:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:06:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:06:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:06:18,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-04 16:06:18,172 INFO L175 Difference]: Start difference. First operand has 458 places, 565 transitions, 9994 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:06:18,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 602 transitions, 11672 flow [2024-06-04 16:06:23,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 602 transitions, 11405 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-04 16:06:23,650 INFO L231 Difference]: Finished difference. Result has 459 places, 573 transitions, 10090 flow [2024-06-04 16:06:23,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9727, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10090, PETRI_PLACES=459, PETRI_TRANSITIONS=573} [2024-06-04 16:06:23,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-04 16:06:23,651 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 573 transitions, 10090 flow [2024-06-04 16:06:23,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:23,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:23,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:23,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 16:06:23,652 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:23,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:23,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1800681942, now seen corresponding path program 13 times [2024-06-04 16:06:23,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:23,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752970376] [2024-06-04 16:06:23,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:23,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:24,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:24,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752970376] [2024-06-04 16:06:24,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752970376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:24,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:24,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:24,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193743192] [2024-06-04 16:06:24,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:24,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:24,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:24,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:24,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:24,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:24,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 573 transitions, 10090 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:24,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:24,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:24,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:26,444 INFO L124 PetriNetUnfolderBase]: 4905/8196 cut-off events. [2024-06-04 16:06:26,444 INFO L125 PetriNetUnfolderBase]: For 1758771/1758774 co-relation queries the response was YES. [2024-06-04 16:06:26,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81334 conditions, 8196 events. 4905/8196 cut-off events. For 1758771/1758774 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 57910 event pairs, 1406 based on Foata normal form. 8/8185 useless extension candidates. Maximal degree in co-relation 81120. Up to 7452 conditions per place. [2024-06-04 16:06:26,573 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 532 selfloop transitions, 72 changer transitions 0/610 dead transitions. [2024-06-04 16:06:26,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 610 transitions, 11467 flow [2024-06-04 16:06:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:06:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:06:26,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-04 16:06:26,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:06:26,574 INFO L175 Difference]: Start difference. First operand has 459 places, 573 transitions, 10090 flow. Second operand 9 states and 207 transitions. [2024-06-04 16:06:26,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 610 transitions, 11467 flow [2024-06-04 16:06:32,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 610 transitions, 11212 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 16:06:32,170 INFO L231 Difference]: Finished difference. Result has 463 places, 574 transitions, 10016 flow [2024-06-04 16:06:32,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9835, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10016, PETRI_PLACES=463, PETRI_TRANSITIONS=574} [2024-06-04 16:06:32,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-04 16:06:32,170 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 574 transitions, 10016 flow [2024-06-04 16:06:32,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:32,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:32,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:32,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 16:06:32,171 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:32,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:32,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1600039452, now seen corresponding path program 14 times [2024-06-04 16:06:32,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:32,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189569668] [2024-06-04 16:06:32,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:32,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:32,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:32,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189569668] [2024-06-04 16:06:32,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189569668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:32,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:32,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:32,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748869755] [2024-06-04 16:06:32,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:32,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:32,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:32,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:32,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:32,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 574 transitions, 10016 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:32,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:32,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:32,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:35,102 INFO L124 PetriNetUnfolderBase]: 4933/8266 cut-off events. [2024-06-04 16:06:35,102 INFO L125 PetriNetUnfolderBase]: For 1795568/1795568 co-relation queries the response was YES. [2024-06-04 16:06:35,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81586 conditions, 8266 events. 4933/8266 cut-off events. For 1795568/1795568 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 58680 event pairs, 1438 based on Foata normal form. 8/8270 useless extension candidates. Maximal degree in co-relation 81372. Up to 7358 conditions per place. [2024-06-04 16:06:35,243 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 439 selfloop transitions, 174 changer transitions 0/619 dead transitions. [2024-06-04 16:06:35,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 619 transitions, 11417 flow [2024-06-04 16:06:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:06:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:06:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 320 transitions. [2024-06-04 16:06:35,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-04 16:06:35,244 INFO L175 Difference]: Start difference. First operand has 463 places, 574 transitions, 10016 flow. Second operand 15 states and 320 transitions. [2024-06-04 16:06:35,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 619 transitions, 11417 flow [2024-06-04 16:06:41,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 619 transitions, 11261 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 16:06:41,305 INFO L231 Difference]: Finished difference. Result has 472 places, 575 transitions, 10248 flow [2024-06-04 16:06:41,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9860, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10248, PETRI_PLACES=472, PETRI_TRANSITIONS=575} [2024-06-04 16:06:41,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-04 16:06:41,306 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 575 transitions, 10248 flow [2024-06-04 16:06:41,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:41,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:41,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:41,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 16:06:41,307 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:41,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:41,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1952117876, now seen corresponding path program 9 times [2024-06-04 16:06:41,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:41,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734038696] [2024-06-04 16:06:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:41,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:41,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:41,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734038696] [2024-06-04 16:06:41,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734038696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:41,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:41,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:41,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158657068] [2024-06-04 16:06:41,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:41,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:41,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:41,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:41,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:41,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 575 transitions, 10248 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:41,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:41,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:41,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:44,366 INFO L124 PetriNetUnfolderBase]: 4915/8245 cut-off events. [2024-06-04 16:06:44,366 INFO L125 PetriNetUnfolderBase]: For 1775607/1775615 co-relation queries the response was YES. [2024-06-04 16:06:44,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81000 conditions, 8245 events. 4915/8245 cut-off events. For 1775607/1775615 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 58605 event pairs, 1450 based on Foata normal form. 14/8254 useless extension candidates. Maximal degree in co-relation 80785. Up to 7418 conditions per place. [2024-06-04 16:06:44,509 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 504 selfloop transitions, 85 changer transitions 0/595 dead transitions. [2024-06-04 16:06:44,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 595 transitions, 11506 flow [2024-06-04 16:06:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:06:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:06:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:06:44,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 16:06:44,510 INFO L175 Difference]: Start difference. First operand has 472 places, 575 transitions, 10248 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:06:44,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 595 transitions, 11506 flow [2024-06-04 16:06:49,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 595 transitions, 11138 flow, removed 12 selfloop flow, removed 13 redundant places. [2024-06-04 16:06:49,267 INFO L231 Difference]: Finished difference. Result has 465 places, 575 transitions, 10060 flow [2024-06-04 16:06:49,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9880, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10060, PETRI_PLACES=465, PETRI_TRANSITIONS=575} [2024-06-04 16:06:49,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-04 16:06:49,267 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 575 transitions, 10060 flow [2024-06-04 16:06:49,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:49,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:49,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:49,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 16:06:49,268 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:49,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:49,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1198564160, now seen corresponding path program 15 times [2024-06-04 16:06:49,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:49,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438724665] [2024-06-04 16:06:49,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:49,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:49,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:49,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438724665] [2024-06-04 16:06:49,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438724665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:49,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:49,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:49,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820795964] [2024-06-04 16:06:49,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:49,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:49,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:49,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:49,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:49,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:49,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 575 transitions, 10060 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:49,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:49,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:49,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:52,325 INFO L124 PetriNetUnfolderBase]: 4943/8284 cut-off events. [2024-06-04 16:06:52,325 INFO L125 PetriNetUnfolderBase]: For 1745142/1745142 co-relation queries the response was YES. [2024-06-04 16:06:52,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80840 conditions, 8284 events. 4943/8284 cut-off events. For 1745142/1745142 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 58775 event pairs, 1434 based on Foata normal form. 8/8288 useless extension candidates. Maximal degree in co-relation 80625. Up to 7586 conditions per place. [2024-06-04 16:06:52,470 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 551 selfloop transitions, 58 changer transitions 0/615 dead transitions. [2024-06-04 16:06:52,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 615 transitions, 11443 flow [2024-06-04 16:06:52,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:06:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:06:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 271 transitions. [2024-06-04 16:06:52,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084427767354597 [2024-06-04 16:06:52,471 INFO L175 Difference]: Start difference. First operand has 465 places, 575 transitions, 10060 flow. Second operand 13 states and 271 transitions. [2024-06-04 16:06:52,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 615 transitions, 11443 flow [2024-06-04 16:06:58,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 615 transitions, 11257 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:06:58,299 INFO L231 Difference]: Finished difference. Result has 471 places, 576 transitions, 10032 flow [2024-06-04 16:06:58,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9874, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10032, PETRI_PLACES=471, PETRI_TRANSITIONS=576} [2024-06-04 16:06:58,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-04 16:06:58,300 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 576 transitions, 10032 flow [2024-06-04 16:06:58,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:58,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:58,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:58,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 16:06:58,300 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:58,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:58,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1951791260, now seen corresponding path program 16 times [2024-06-04 16:06:58,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:58,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679939785] [2024-06-04 16:06:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:58,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:58,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:58,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679939785] [2024-06-04 16:06:58,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679939785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:58,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:58,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:06:58,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390165120] [2024-06-04 16:06:58,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:58,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:06:58,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:58,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:06:58,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:06:58,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:58,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 576 transitions, 10032 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:58,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:58,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:58,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:01,234 INFO L124 PetriNetUnfolderBase]: 4871/8173 cut-off events. [2024-06-04 16:07:01,234 INFO L125 PetriNetUnfolderBase]: For 1692501/1692504 co-relation queries the response was YES. [2024-06-04 16:07:01,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76009 conditions, 8173 events. 4871/8173 cut-off events. For 1692501/1692504 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 58055 event pairs, 1284 based on Foata normal form. 38/8205 useless extension candidates. Maximal degree in co-relation 75795. Up to 6715 conditions per place. [2024-06-04 16:07:01,360 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 525 selfloop transitions, 88 changer transitions 4/623 dead transitions. [2024-06-04 16:07:01,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 623 transitions, 11710 flow [2024-06-04 16:07:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:07:01,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 16:07:01,361 INFO L175 Difference]: Start difference. First operand has 471 places, 576 transitions, 10032 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:07:01,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 623 transitions, 11710 flow [2024-06-04 16:07:06,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 623 transitions, 11579 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-04 16:07:06,795 INFO L231 Difference]: Finished difference. Result has 470 places, 575 transitions, 10064 flow [2024-06-04 16:07:06,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9901, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10064, PETRI_PLACES=470, PETRI_TRANSITIONS=575} [2024-06-04 16:07:06,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-04 16:07:06,795 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 575 transitions, 10064 flow [2024-06-04 16:07:06,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:06,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:06,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:06,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 16:07:06,796 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:06,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1951791446, now seen corresponding path program 10 times [2024-06-04 16:07:06,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:06,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198955512] [2024-06-04 16:07:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:06,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:07,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:07,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198955512] [2024-06-04 16:07:07,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198955512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:07,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:07,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:07:07,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139251777] [2024-06-04 16:07:07,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:07,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:07:07,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:07,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:07:07,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:07:07,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:07,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 575 transitions, 10064 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:07,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:07,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:07,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:09,363 INFO L124 PetriNetUnfolderBase]: 4828/8100 cut-off events. [2024-06-04 16:07:09,363 INFO L125 PetriNetUnfolderBase]: For 1486853/1486861 co-relation queries the response was YES. [2024-06-04 16:07:09,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75150 conditions, 8100 events. 4828/8100 cut-off events. For 1486853/1486861 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 57332 event pairs, 1050 based on Foata normal form. 12/8107 useless extension candidates. Maximal degree in co-relation 74935. Up to 6877 conditions per place. [2024-06-04 16:07:09,490 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 495 selfloop transitions, 101 changer transitions 0/602 dead transitions. [2024-06-04 16:07:09,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 602 transitions, 11598 flow [2024-06-04 16:07:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:07:09,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-04 16:07:09,491 INFO L175 Difference]: Start difference. First operand has 470 places, 575 transitions, 10064 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:07:09,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 602 transitions, 11598 flow [2024-06-04 16:07:14,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 602 transitions, 11264 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-04 16:07:14,638 INFO L231 Difference]: Finished difference. Result has 466 places, 575 transitions, 9947 flow [2024-06-04 16:07:14,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9730, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9947, PETRI_PLACES=466, PETRI_TRANSITIONS=575} [2024-06-04 16:07:14,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-04 16:07:14,639 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 575 transitions, 9947 flow [2024-06-04 16:07:14,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:14,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:14,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:14,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 16:07:14,639 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:14,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:14,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2066527092, now seen corresponding path program 17 times [2024-06-04 16:07:14,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:14,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867674223] [2024-06-04 16:07:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:15,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:15,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867674223] [2024-06-04 16:07:15,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867674223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:15,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:15,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:07:15,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121364714] [2024-06-04 16:07:15,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:15,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:07:15,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:15,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:07:15,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:07:15,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:15,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 575 transitions, 9947 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:15,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:15,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:15,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:17,274 INFO L124 PetriNetUnfolderBase]: 4723/7951 cut-off events. [2024-06-04 16:07:17,274 INFO L125 PetriNetUnfolderBase]: For 1465991/1465994 co-relation queries the response was YES. [2024-06-04 16:07:17,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68056 conditions, 7951 events. 4723/7951 cut-off events. For 1465991/1465994 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 56467 event pairs, 1295 based on Foata normal form. 52/7999 useless extension candidates. Maximal degree in co-relation 67842. Up to 6939 conditions per place. [2024-06-04 16:07:17,393 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 523 selfloop transitions, 79 changer transitions 3/611 dead transitions. [2024-06-04 16:07:17,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 611 transitions, 11297 flow [2024-06-04 16:07:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:07:17,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:07:17,394 INFO L175 Difference]: Start difference. First operand has 466 places, 575 transitions, 9947 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:07:17,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 611 transitions, 11297 flow [2024-06-04 16:07:22,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 611 transitions, 11089 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:22,818 INFO L231 Difference]: Finished difference. Result has 468 places, 574 transitions, 9899 flow [2024-06-04 16:07:22,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9739, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9899, PETRI_PLACES=468, PETRI_TRANSITIONS=574} [2024-06-04 16:07:22,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-04 16:07:22,819 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 574 transitions, 9899 flow [2024-06-04 16:07:22,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:22,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:22,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:22,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 16:07:22,819 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:22,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:22,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1498560188, now seen corresponding path program 18 times [2024-06-04 16:07:22,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:22,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181017216] [2024-06-04 16:07:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:22,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:23,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:23,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181017216] [2024-06-04 16:07:23,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181017216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:23,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:23,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:07:23,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233644468] [2024-06-04 16:07:23,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:23,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:07:23,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:23,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:07:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:07:23,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:23,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 574 transitions, 9899 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:23,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:23,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:23,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:25,285 INFO L124 PetriNetUnfolderBase]: 4626/7808 cut-off events. [2024-06-04 16:07:25,286 INFO L125 PetriNetUnfolderBase]: For 1110368/1110371 co-relation queries the response was YES. [2024-06-04 16:07:25,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61792 conditions, 7808 events. 4626/7808 cut-off events. For 1110368/1110371 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 55428 event pairs, 1238 based on Foata normal form. 44/7848 useless extension candidates. Maximal degree in co-relation 61579. Up to 6782 conditions per place. [2024-06-04 16:07:25,405 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 502 selfloop transitions, 103 changer transitions 3/614 dead transitions. [2024-06-04 16:07:25,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 614 transitions, 11265 flow [2024-06-04 16:07:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:07:25,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-04 16:07:25,406 INFO L175 Difference]: Start difference. First operand has 468 places, 574 transitions, 9899 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:07:25,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 614 transitions, 11265 flow [2024-06-04 16:07:30,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 614 transitions, 11074 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:30,395 INFO L231 Difference]: Finished difference. Result has 470 places, 573 transitions, 9916 flow [2024-06-04 16:07:30,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9708, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9916, PETRI_PLACES=470, PETRI_TRANSITIONS=573} [2024-06-04 16:07:30,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-04 16:07:30,396 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 573 transitions, 9916 flow [2024-06-04 16:07:30,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:30,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:30,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:30,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 16:07:30,396 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:30,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:30,396 INFO L85 PathProgramCache]: Analyzing trace with hash -773959432, now seen corresponding path program 11 times [2024-06-04 16:07:30,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:30,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891358065] [2024-06-04 16:07:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:30,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:30,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891358065] [2024-06-04 16:07:30,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891358065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:30,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:30,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:07:30,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268782821] [2024-06-04 16:07:30,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:30,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:07:30,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:07:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:07:30,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:30,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 573 transitions, 9916 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:30,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:30,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:30,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:32,718 INFO L124 PetriNetUnfolderBase]: 4598/7774 cut-off events. [2024-06-04 16:07:32,718 INFO L125 PetriNetUnfolderBase]: For 846280/846288 co-relation queries the response was YES. [2024-06-04 16:07:32,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60616 conditions, 7774 events. 4598/7774 cut-off events. For 846280/846288 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 55258 event pairs, 1251 based on Foata normal form. 14/7783 useless extension candidates. Maximal degree in co-relation 60402. Up to 6951 conditions per place. [2024-06-04 16:07:32,839 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 492 selfloop transitions, 97 changer transitions 0/595 dead transitions. [2024-06-04 16:07:32,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 595 transitions, 11178 flow [2024-06-04 16:07:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 16:07:32,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-04 16:07:32,840 INFO L175 Difference]: Start difference. First operand has 470 places, 573 transitions, 9916 flow. Second operand 8 states and 179 transitions. [2024-06-04 16:07:32,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 595 transitions, 11178 flow [2024-06-04 16:07:37,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 595 transitions, 10933 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 16:07:37,203 INFO L231 Difference]: Finished difference. Result has 469 places, 573 transitions, 9875 flow [2024-06-04 16:07:37,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9671, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9875, PETRI_PLACES=469, PETRI_TRANSITIONS=573} [2024-06-04 16:07:37,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-04 16:07:37,203 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 573 transitions, 9875 flow [2024-06-04 16:07:37,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:37,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:37,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:37,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 16:07:37,204 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:37,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash 670264326, now seen corresponding path program 12 times [2024-06-04 16:07:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:37,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896550921] [2024-06-04 16:07:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:37,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:37,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:37,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896550921] [2024-06-04 16:07:37,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896550921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:37,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:37,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798941237] [2024-06-04 16:07:37,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:37,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:37,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:37,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:37,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:37,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:37,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 573 transitions, 9875 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:37,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:37,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:37,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:39,510 INFO L124 PetriNetUnfolderBase]: 4580/7746 cut-off events. [2024-06-04 16:07:39,511 INFO L125 PetriNetUnfolderBase]: For 801825/801828 co-relation queries the response was YES. [2024-06-04 16:07:39,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59473 conditions, 7746 events. 4580/7746 cut-off events. For 801825/801828 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 55067 event pairs, 1289 based on Foata normal form. 10/7748 useless extension candidates. Maximal degree in co-relation 59258. Up to 6930 conditions per place. [2024-06-04 16:07:39,638 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 484 selfloop transitions, 98 changer transitions 0/588 dead transitions. [2024-06-04 16:07:39,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 588 transitions, 11105 flow [2024-06-04 16:07:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-04 16:07:39,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-04 16:07:39,639 INFO L175 Difference]: Start difference. First operand has 469 places, 573 transitions, 9875 flow. Second operand 7 states and 153 transitions. [2024-06-04 16:07:39,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 588 transitions, 11105 flow [2024-06-04 16:07:44,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 588 transitions, 10854 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 16:07:44,207 INFO L231 Difference]: Finished difference. Result has 468 places, 573 transitions, 9825 flow [2024-06-04 16:07:44,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9624, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9825, PETRI_PLACES=468, PETRI_TRANSITIONS=573} [2024-06-04 16:07:44,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-04 16:07:44,207 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 573 transitions, 9825 flow [2024-06-04 16:07:44,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:44,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:44,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:44,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 16:07:44,208 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:44,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:44,208 INFO L85 PathProgramCache]: Analyzing trace with hash 667407366, now seen corresponding path program 13 times [2024-06-04 16:07:44,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:44,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587393613] [2024-06-04 16:07:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:44,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:44,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:44,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587393613] [2024-06-04 16:07:44,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587393613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:44,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:44,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:44,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678147425] [2024-06-04 16:07:44,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:44,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:44,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:44,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:44,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:44,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:44,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 573 transitions, 9825 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:44,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:44,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:44,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:46,528 INFO L124 PetriNetUnfolderBase]: 4562/7720 cut-off events. [2024-06-04 16:07:46,529 INFO L125 PetriNetUnfolderBase]: For 746225/746228 co-relation queries the response was YES. [2024-06-04 16:07:46,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58200 conditions, 7720 events. 4562/7720 cut-off events. For 746225/746228 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 54814 event pairs, 1265 based on Foata normal form. 10/7722 useless extension candidates. Maximal degree in co-relation 57985. Up to 6792 conditions per place. [2024-06-04 16:07:46,651 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 486 selfloop transitions, 100 changer transitions 0/592 dead transitions. [2024-06-04 16:07:46,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 592 transitions, 11103 flow [2024-06-04 16:07:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:46,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-04 16:07:46,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-04 16:07:46,652 INFO L175 Difference]: Start difference. First operand has 468 places, 573 transitions, 9825 flow. Second operand 7 states and 156 transitions. [2024-06-04 16:07:46,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 592 transitions, 11103 flow [2024-06-04 16:07:50,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 592 transitions, 10866 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:50,909 INFO L231 Difference]: Finished difference. Result has 468 places, 573 transitions, 9792 flow [2024-06-04 16:07:50,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9588, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9792, PETRI_PLACES=468, PETRI_TRANSITIONS=573} [2024-06-04 16:07:50,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-04 16:07:50,910 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 573 transitions, 9792 flow [2024-06-04 16:07:50,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:50,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:50,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:50,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 16:07:50,911 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:50,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:50,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1287213248, now seen corresponding path program 1 times [2024-06-04 16:07:50,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:50,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599951706] [2024-06-04 16:07:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:50,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:51,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:51,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599951706] [2024-06-04 16:07:51,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599951706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:51,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:51,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:07:51,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297759495] [2024-06-04 16:07:51,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:51,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:07:51,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:07:51,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:07:51,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:51,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 573 transitions, 9792 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:51,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:51,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:51,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:53,571 INFO L124 PetriNetUnfolderBase]: 4643/7846 cut-off events. [2024-06-04 16:07:53,571 INFO L125 PetriNetUnfolderBase]: For 788150/788150 co-relation queries the response was YES. [2024-06-04 16:07:53,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60016 conditions, 7846 events. 4643/7846 cut-off events. For 788150/788150 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 55851 event pairs, 1200 based on Foata normal form. 6/7842 useless extension candidates. Maximal degree in co-relation 59801. Up to 6566 conditions per place. [2024-06-04 16:07:53,689 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 549 selfloop transitions, 73 changer transitions 0/628 dead transitions. [2024-06-04 16:07:53,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 628 transitions, 11565 flow [2024-06-04 16:07:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:07:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:07:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-04 16:07:53,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290806754221389 [2024-06-04 16:07:53,693 INFO L175 Difference]: Start difference. First operand has 468 places, 573 transitions, 9792 flow. Second operand 13 states and 282 transitions. [2024-06-04 16:07:53,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 628 transitions, 11565 flow [2024-06-04 16:07:58,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 628 transitions, 11278 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:58,856 INFO L231 Difference]: Finished difference. Result has 475 places, 576 transitions, 9791 flow [2024-06-04 16:07:58,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9505, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9791, PETRI_PLACES=475, PETRI_TRANSITIONS=576} [2024-06-04 16:07:58,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-04 16:07:58,857 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 576 transitions, 9791 flow [2024-06-04 16:07:58,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:58,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:58,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:58,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 16:07:58,857 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:58,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:58,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1401502680, now seen corresponding path program 2 times [2024-06-04 16:07:58,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:58,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204600550] [2024-06-04 16:07:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:58,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:59,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:59,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204600550] [2024-06-04 16:07:59,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204600550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:59,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:59,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:07:59,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243532609] [2024-06-04 16:07:59,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:59,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:07:59,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:59,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:07:59,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:07:59,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:59,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 576 transitions, 9791 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:59,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:59,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:59,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:01,604 INFO L124 PetriNetUnfolderBase]: 4810/8129 cut-off events. [2024-06-04 16:08:01,604 INFO L125 PetriNetUnfolderBase]: For 1018159/1018159 co-relation queries the response was YES. [2024-06-04 16:08:01,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65473 conditions, 8129 events. 4810/8129 cut-off events. For 1018159/1018159 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 58054 event pairs, 1299 based on Foata normal form. 6/8125 useless extension candidates. Maximal degree in co-relation 65256. Up to 5958 conditions per place. [2024-06-04 16:08:01,730 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 433 selfloop transitions, 193 changer transitions 0/632 dead transitions. [2024-06-04 16:08:01,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 632 transitions, 11595 flow [2024-06-04 16:08:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:08:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:08:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 325 transitions. [2024-06-04 16:08:01,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-04 16:08:01,731 INFO L175 Difference]: Start difference. First operand has 475 places, 576 transitions, 9791 flow. Second operand 15 states and 325 transitions. [2024-06-04 16:08:01,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 632 transitions, 11595 flow [2024-06-04 16:08:07,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 632 transitions, 11456 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-04 16:08:07,539 INFO L231 Difference]: Finished difference. Result has 483 places, 578 transitions, 10174 flow [2024-06-04 16:08:07,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9672, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10174, PETRI_PLACES=483, PETRI_TRANSITIONS=578} [2024-06-04 16:08:07,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-04 16:08:07,540 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 578 transitions, 10174 flow [2024-06-04 16:08:07,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:07,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:07,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:07,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 16:08:07,541 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:07,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:07,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2075250880, now seen corresponding path program 3 times [2024-06-04 16:08:07,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:07,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801829487] [2024-06-04 16:08:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:07,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:07,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:07,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801829487] [2024-06-04 16:08:07,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801829487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:07,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:07,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:08:07,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633931128] [2024-06-04 16:08:07,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:07,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:08:07,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:07,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:08:07,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:08:08,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:08,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 578 transitions, 10174 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:08,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:08,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:08,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:10,139 INFO L124 PetriNetUnfolderBase]: 4830/8175 cut-off events. [2024-06-04 16:08:10,139 INFO L125 PetriNetUnfolderBase]: For 1031133/1031133 co-relation queries the response was YES. [2024-06-04 16:08:10,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66396 conditions, 8175 events. 4830/8175 cut-off events. For 1031133/1031133 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 58582 event pairs, 1357 based on Foata normal form. 6/8175 useless extension candidates. Maximal degree in co-relation 66176. Up to 7147 conditions per place. [2024-06-04 16:08:10,267 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 441 selfloop transitions, 177 changer transitions 0/624 dead transitions. [2024-06-04 16:08:10,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 624 transitions, 11593 flow [2024-06-04 16:08:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-04 16:08:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-04 16:08:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 332 transitions. [2024-06-04 16:08:10,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-04 16:08:10,268 INFO L175 Difference]: Start difference. First operand has 483 places, 578 transitions, 10174 flow. Second operand 16 states and 332 transitions. [2024-06-04 16:08:10,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 624 transitions, 11593 flow [2024-06-04 16:08:16,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 624 transitions, 11236 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-04 16:08:16,640 INFO L231 Difference]: Finished difference. Result has 487 places, 579 transitions, 10202 flow [2024-06-04 16:08:16,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9818, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10202, PETRI_PLACES=487, PETRI_TRANSITIONS=579} [2024-06-04 16:08:16,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-04 16:08:16,641 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 579 transitions, 10202 flow [2024-06-04 16:08:16,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:16,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:16,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:16,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 16:08:16,641 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:16,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:16,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1897168530, now seen corresponding path program 4 times [2024-06-04 16:08:16,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:16,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916950788] [2024-06-04 16:08:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:16,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:17,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:17,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916950788] [2024-06-04 16:08:17,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916950788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:17,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:17,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:08:17,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188038744] [2024-06-04 16:08:17,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:17,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:08:17,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:17,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:08:17,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:08:17,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:17,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 579 transitions, 10202 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:17,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:17,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:17,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:19,228 INFO L124 PetriNetUnfolderBase]: 4758/8066 cut-off events. [2024-06-04 16:08:19,228 INFO L125 PetriNetUnfolderBase]: For 1001631/1001634 co-relation queries the response was YES. [2024-06-04 16:08:19,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61311 conditions, 8066 events. 4758/8066 cut-off events. For 1001631/1001634 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 57966 event pairs, 1203 based on Foata normal form. 38/8098 useless extension candidates. Maximal degree in co-relation 61090. Up to 6375 conditions per place. [2024-06-04 16:08:19,361 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 501 selfloop transitions, 112 changer transitions 6/625 dead transitions. [2024-06-04 16:08:19,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 625 transitions, 11654 flow [2024-06-04 16:08:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:08:19,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:08:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-04 16:08:19,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-04 16:08:19,362 INFO L175 Difference]: Start difference. First operand has 487 places, 579 transitions, 10202 flow. Second operand 9 states and 221 transitions. [2024-06-04 16:08:19,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 625 transitions, 11654 flow [2024-06-04 16:08:24,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 625 transitions, 11278 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-06-04 16:08:24,265 INFO L231 Difference]: Finished difference. Result has 482 places, 578 transitions, 10040 flow [2024-06-04 16:08:24,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9826, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10040, PETRI_PLACES=482, PETRI_TRANSITIONS=578} [2024-06-04 16:08:24,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-04 16:08:24,265 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 578 transitions, 10040 flow [2024-06-04 16:08:24,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:24,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:24,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:24,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 16:08:24,266 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:24,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:24,266 INFO L85 PathProgramCache]: Analyzing trace with hash -773559718, now seen corresponding path program 1 times [2024-06-04 16:08:24,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:24,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752482759] [2024-06-04 16:08:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:24,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:24,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:24,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752482759] [2024-06-04 16:08:24,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752482759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:24,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:24,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:08:24,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681788750] [2024-06-04 16:08:24,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:24,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:08:24,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:24,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:08:24,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:08:24,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:24,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 578 transitions, 10040 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:24,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:24,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:24,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:26,800 INFO L124 PetriNetUnfolderBase]: 4764/8082 cut-off events. [2024-06-04 16:08:26,800 INFO L125 PetriNetUnfolderBase]: For 796682/796690 co-relation queries the response was YES. [2024-06-04 16:08:26,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61175 conditions, 8082 events. 4764/8082 cut-off events. For 796682/796690 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 57983 event pairs, 1262 based on Foata normal form. 12/8089 useless extension candidates. Maximal degree in co-relation 60953. Up to 7085 conditions per place. [2024-06-04 16:08:26,924 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 494 selfloop transitions, 107 changer transitions 0/607 dead transitions. [2024-06-04 16:08:26,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 607 transitions, 11386 flow [2024-06-04 16:08:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:08:26,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-04 16:08:26,926 INFO L175 Difference]: Start difference. First operand has 482 places, 578 transitions, 10040 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:08:26,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 607 transitions, 11386 flow