./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe030_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/safe030_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/safe030_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe030_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 16:15:02,772 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:15:02,833 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:15:02,837 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:15:02,838 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:15:02,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:15:02,862 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:15:02,862 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:15:02,862 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:15:02,866 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:15:02,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:15:02,866 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:15:02,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:15:02,868 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:15:02,868 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:15:02,868 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:15:02,869 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:15:02,869 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:15:02,869 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:15:02,869 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:15:02,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:15:02,870 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:15:02,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:15:02,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:15:02,870 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:15:02,871 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:15:02,871 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:15:02,871 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:15:02,872 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:15:02,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:15:02,873 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:15:02,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:15:02,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:15:02,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:15:02,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:15:02,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:15:02,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:15:02,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:15:02,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:15:02,874 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:15:02,874 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:15:02,875 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:15:02,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:15:02,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:15:03,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:15:03,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:15:03,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:15:03,121 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:15:03,121 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:15:03,122 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2024-06-04 16:15:04,157 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:15:04,323 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:15:04,324 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2024-06-04 16:15:04,336 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d5d934e/2f51b185b8ae4806b4499846a46d940a/FLAGb1c1636e7 [2024-06-04 16:15:04,347 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d5d934e/2f51b185b8ae4806b4499846a46d940a [2024-06-04 16:15:04,349 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:15:04,349 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:15:04,350 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe030_tso.yml/witness.yml [2024-06-04 16:15:04,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:15:04,529 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:15:04,530 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:15:04,530 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:15:04,534 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:15:04,534 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:15:04" (1/2) ... [2024-06-04 16:15:04,535 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a3c198c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04, skipping insertion in model container [2024-06-04 16:15:04,535 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:15:04" (1/2) ... [2024-06-04 16:15:04,537 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@336b938a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:04, skipping insertion in model container [2024-06-04 16:15:04,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:15:04" (2/2) ... [2024-06-04 16:15:04,538 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a3c198c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:04, skipping insertion in model container [2024-06-04 16:15:04,538 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:15:04" (2/2) ... [2024-06-04 16:15:04,538 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:15:04,576 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:15:04,577 INFO L97 edCorrectnessWitness]: Location invariant before [L777-L777] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((((long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )main$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) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((((((((0 <= __unbuffered_cnt && 0 <= x) && 0 <= y) && 0 <= z) && z <= 2) && z <= 127) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2))) [2024-06-04 16:15:04,577 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((((long long )__unbuffered_cnt + (long long )main$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 )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((((((((0 <= __unbuffered_cnt && 0 <= x) && 0 <= y) && 0 <= z) && z <= 2) && z <= 127) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2))) [2024-06-04 16:15:04,578 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((((long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )main$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) && (2LL + (long long )__unbuffered_cnt) - (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))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((((((((0 <= __unbuffered_cnt && 0 <= x) && 0 <= y) && 0 <= z) && z <= 2) && z <= 127) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2))) [2024-06-04 16:15:04,578 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:15:04,578 INFO L106 edCorrectnessWitness]: ghost_update [L775-L775] multithreaded = 1; [2024-06-04 16:15:04,626 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:15:04,922 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:15:04,933 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:15:05,031 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:15:05,065 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:15:05,065 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05 WrapperNode [2024-06-04 16:15:05,065 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:15:05,066 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:15:05,066 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:15:05,066 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:15:05,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (1/1) ... [2024-06-04 16:15:05,094 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (1/1) ... [2024-06-04 16:15:05,127 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2024-06-04 16:15:05,128 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:15:05,128 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:15:05,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:15:05,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:15:05,137 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (1/1) ... [2024-06-04 16:15:05,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (1/1) ... [2024-06-04 16:15:05,139 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (1/1) ... [2024-06-04 16:15:05,154 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 16:15:05,155 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (1/1) ... [2024-06-04 16:15:05,155 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (1/1) ... [2024-06-04 16:15:05,159 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (1/1) ... [2024-06-04 16:15:05,161 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (1/1) ... [2024-06-04 16:15:05,162 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (1/1) ... [2024-06-04 16:15:05,163 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (1/1) ... [2024-06-04 16:15:05,165 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:15:05,165 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:15:05,165 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:15:05,165 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:15:05,166 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (1/1) ... [2024-06-04 16:15:05,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:15:05,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:15:05,189 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 16:15:05,222 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 16:15:05,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:15:05,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:15:05,252 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:15:05,253 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:15:05,253 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:15:05,253 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:15:05,253 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:15:05,253 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:15:05,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:15:05,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:15:05,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:15:05,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:15:05,255 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 16:15:05,382 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:15:05,384 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:15:05,602 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:15:05,602 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:15:05,680 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:15:05,681 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:15:05,681 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:15:05 BoogieIcfgContainer [2024-06-04 16:15:05,681 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:15:05,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:15:05,683 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:15:05,685 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:15:05,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:15:04" (1/4) ... [2024-06-04 16:15:05,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9e7261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:15:05, skipping insertion in model container [2024-06-04 16:15:05,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:15:04" (2/4) ... [2024-06-04 16:15:05,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9e7261 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:15:05, skipping insertion in model container [2024-06-04 16:15:05,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:05" (3/4) ... [2024-06-04 16:15:05,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9e7261 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:15:05, skipping insertion in model container [2024-06-04 16:15:05,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:15:05" (4/4) ... [2024-06-04 16:15:05,688 INFO L112 eAbstractionObserver]: Analyzing ICFG safe030_tso.i [2024-06-04 16:15:05,701 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:15:05,701 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:15:05,701 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:15:05,741 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:15:05,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:15:05,806 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-04 16:15:05,806 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:15:05,808 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 60 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 16:15:05,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:15:05,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-04 16:15:05,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:15:05,830 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;@4a96d0f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:15:05,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:15:05,834 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:15:05,835 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:15:05,835 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:15:05,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:05,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:15:05,836 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 16:15:05,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2004445253, now seen corresponding path program 1 times [2024-06-04 16:15:05,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:05,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669847948] [2024-06-04 16:15:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:05,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:06,297 INFO 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 16:15:06,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:06,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669847948] [2024-06-04 16:15:06,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669847948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:06,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:06,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:15:06,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711079268] [2024-06-04 16:15:06,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:06,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:15:06,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:06,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:15:06,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:15:06,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:06,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:06,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:06,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:06,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:06,596 INFO L124 PetriNetUnfolderBase]: 946/1512 cut-off events. [2024-06-04 16:15:06,597 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-04 16:15:06,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3020 conditions, 1512 events. 946/1512 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7444 event pairs, 638 based on Foata normal form. 1/1443 useless extension candidates. Maximal degree in co-relation 3005. Up to 1431 conditions per place. [2024-06-04 16:15:06,607 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-04 16:15:06,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-04 16:15:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:15:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:15:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-04 16:15:06,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-04 16:15:06,618 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 78 transitions. [2024-06-04 16:15:06,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-04 16:15:06,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:06,622 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-04 16:15:06,623 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 16:15:06,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 16:15:06,626 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-04 16:15:06,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:06,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:06,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:06,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:15:06,626 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 16:15:06,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:06,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2126518694, now seen corresponding path program 1 times [2024-06-04 16:15:06,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:06,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644582550] [2024-06-04 16:15:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:06,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:06,750 INFO 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 16:15:06,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:06,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644582550] [2024-06-04 16:15:06,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644582550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:06,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:06,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:15:06,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641377924] [2024-06-04 16:15:06,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:06,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:15:06,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:06,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:15:06,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:15:06,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:06,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:06,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:06,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:06,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:06,956 INFO L124 PetriNetUnfolderBase]: 940/1508 cut-off events. [2024-06-04 16:15:06,956 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2024-06-04 16:15:06,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3431 conditions, 1508 events. 940/1508 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7444 event pairs, 532 based on Foata normal form. 3/1474 useless extension candidates. Maximal degree in co-relation 3416. Up to 1407 conditions per place. [2024-06-04 16:15:06,965 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-04 16:15:06,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 238 flow [2024-06-04 16:15:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-04 16:15:06,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-04 16:15:06,969 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-06-04 16:15:06,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 238 flow [2024-06-04 16:15:06,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:15:06,972 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-04 16:15:06,972 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-04 16:15:06,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-04 16:15:06,973 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-04 16:15:06,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:06,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:06,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:06,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:15:06,975 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 16:15:06,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:06,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1497569362, now seen corresponding path program 1 times [2024-06-04 16:15:06,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:06,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895432599] [2024-06-04 16:15:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:06,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:07,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:07,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895432599] [2024-06-04 16:15:07,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895432599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:07,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:07,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:15:07,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416256581] [2024-06-04 16:15:07,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:07,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:15:07,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:15:07,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:15:07,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:07,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:07,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:07,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:07,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:07,344 INFO L124 PetriNetUnfolderBase]: 948/1554 cut-off events. [2024-06-04 16:15:07,344 INFO L125 PetriNetUnfolderBase]: For 829/829 co-relation queries the response was YES. [2024-06-04 16:15:07,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3904 conditions, 1554 events. 948/1554 cut-off events. For 829/829 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7855 event pairs, 366 based on Foata normal form. 5/1542 useless extension candidates. Maximal degree in co-relation 3887. Up to 1353 conditions per place. [2024-06-04 16:15:07,353 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 52 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-04 16:15:07,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 392 flow [2024-06-04 16:15:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-04 16:15:07,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-06-04 16:15:07,358 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 132 transitions. [2024-06-04 16:15:07,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 392 flow [2024-06-04 16:15:07,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 378 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:07,362 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-04 16:15:07,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-04 16:15:07,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-04 16:15:07,364 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-04 16:15:07,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:07,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:07,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:07,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:15:07,364 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 16:15:07,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:07,365 INFO L85 PathProgramCache]: Analyzing trace with hash -350088915, now seen corresponding path program 1 times [2024-06-04 16:15:07,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:07,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3231034] [2024-06-04 16:15:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:07,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:07,536 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 16:15:07,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:07,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3231034] [2024-06-04 16:15:07,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3231034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:07,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:07,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:07,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721819290] [2024-06-04 16:15:07,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:07,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:07,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:07,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:07,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:07,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:07,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:07,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:07,777 INFO L124 PetriNetUnfolderBase]: 960/1574 cut-off events. [2024-06-04 16:15:07,777 INFO L125 PetriNetUnfolderBase]: For 1961/1963 co-relation queries the response was YES. [2024-06-04 16:15:07,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4718 conditions, 1574 events. 960/1574 cut-off events. For 1961/1963 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7975 event pairs, 245 based on Foata normal form. 12/1569 useless extension candidates. Maximal degree in co-relation 4698. Up to 1321 conditions per place. [2024-06-04 16:15:07,786 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-04 16:15:07,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 495 flow [2024-06-04 16:15:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 16:15:07,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-04 16:15:07,788 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 152 transitions. [2024-06-04 16:15:07,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 495 flow [2024-06-04 16:15:07,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 487 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-04 16:15:07,795 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 291 flow [2024-06-04 16:15:07,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-04 16:15:07,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-04 16:15:07,796 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 291 flow [2024-06-04 16:15:07,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:07,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:07,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:07,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:15:07,797 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 16:15:07,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:07,797 INFO L85 PathProgramCache]: Analyzing trace with hash -734151125, now seen corresponding path program 1 times [2024-06-04 16:15:07,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:07,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302047825] [2024-06-04 16:15:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:07,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:08,002 INFO 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 16:15:08,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:08,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302047825] [2024-06-04 16:15:08,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302047825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:08,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:08,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:15:08,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614320033] [2024-06-04 16:15:08,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:08,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:15:08,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:08,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:15:08,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:15:08,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:08,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:08,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:08,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:08,169 INFO L124 PetriNetUnfolderBase]: 955/1562 cut-off events. [2024-06-04 16:15:08,169 INFO L125 PetriNetUnfolderBase]: For 2897/2897 co-relation queries the response was YES. [2024-06-04 16:15:08,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5151 conditions, 1562 events. 955/1562 cut-off events. For 2897/2897 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7874 event pairs, 354 based on Foata normal form. 2/1545 useless extension candidates. Maximal degree in co-relation 5128. Up to 1438 conditions per place. [2024-06-04 16:15:08,179 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 49 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2024-06-04 16:15:08,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 431 flow [2024-06-04 16:15:08,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-04 16:15:08,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:15:08,180 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 291 flow. Second operand 4 states and 96 transitions. [2024-06-04 16:15:08,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 431 flow [2024-06-04 16:15:08,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 381 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:08,186 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 263 flow [2024-06-04 16:15:08,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-04 16:15:08,188 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-04 16:15:08,189 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 263 flow [2024-06-04 16:15:08,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:08,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:08,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:15:08,193 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 16:15:08,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:08,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1299559337, now seen corresponding path program 1 times [2024-06-04 16:15:08,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:08,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576524582] [2024-06-04 16:15:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:08,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:08,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:08,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576524582] [2024-06-04 16:15:08,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576524582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:08,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:08,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:08,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504720242] [2024-06-04 16:15:08,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:08,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:08,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:08,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:08,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:08,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:08,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:08,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:08,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:08,575 INFO L124 PetriNetUnfolderBase]: 957/1575 cut-off events. [2024-06-04 16:15:08,576 INFO L125 PetriNetUnfolderBase]: For 3318/3318 co-relation queries the response was YES. [2024-06-04 16:15:08,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5140 conditions, 1575 events. 957/1575 cut-off events. For 3318/3318 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7873 event pairs, 334 based on Foata normal form. 3/1576 useless extension candidates. Maximal degree in co-relation 5116. Up to 1413 conditions per place. [2024-06-04 16:15:08,585 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 57 selfloop transitions, 18 changer transitions 0/81 dead transitions. [2024-06-04 16:15:08,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 533 flow [2024-06-04 16:15:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-04 16:15:08,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:15:08,586 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 263 flow. Second operand 7 states and 154 transitions. [2024-06-04 16:15:08,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 533 flow [2024-06-04 16:15:08,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 513 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:08,590 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 366 flow [2024-06-04 16:15:08,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=366, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2024-06-04 16:15:08,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-04 16:15:08,591 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 366 flow [2024-06-04 16:15:08,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:08,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:08,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:15:08,592 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 16:15:08,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1637354200, now seen corresponding path program 1 times [2024-06-04 16:15:08,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:08,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56119334] [2024-06-04 16:15:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:08,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:08,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:08,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56119334] [2024-06-04 16:15:08,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56119334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:08,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:08,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:15:08,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707023696] [2024-06-04 16:15:08,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:08,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:15:08,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:08,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:15:08,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:15:08,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:08,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 366 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 16:15:08,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:08,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:08,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:08,926 INFO L124 PetriNetUnfolderBase]: 963/1594 cut-off events. [2024-06-04 16:15:08,926 INFO L125 PetriNetUnfolderBase]: For 4978/4982 co-relation queries the response was YES. [2024-06-04 16:15:08,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5803 conditions, 1594 events. 963/1594 cut-off events. For 4978/4982 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7988 event pairs, 337 based on Foata normal form. 8/1599 useless extension candidates. Maximal degree in co-relation 5777. Up to 1375 conditions per place. [2024-06-04 16:15:08,937 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 61 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2024-06-04 16:15:08,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 620 flow [2024-06-04 16:15:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-04 16:15:08,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:15:08,939 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 366 flow. Second operand 5 states and 125 transitions. [2024-06-04 16:15:08,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 620 flow [2024-06-04 16:15:08,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 586 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:08,946 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 402 flow [2024-06-04 16:15:08,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=402, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-04 16:15:08,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-04 16:15:08,948 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 402 flow [2024-06-04 16:15:08,948 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 16:15:08,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:08,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:08,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:15:08,949 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 16:15:08,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:08,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1144557430, now seen corresponding path program 2 times [2024-06-04 16:15:08,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:08,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619310576] [2024-06-04 16:15:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:08,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:09,097 INFO 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 16:15:09,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:09,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619310576] [2024-06-04 16:15:09,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619310576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:09,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:09,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:15:09,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296295482] [2024-06-04 16:15:09,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:09,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:15:09,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:09,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:15:09,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:15:09,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:09,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 402 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 16:15:09,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:09,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:09,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:09,271 INFO L124 PetriNetUnfolderBase]: 951/1567 cut-off events. [2024-06-04 16:15:09,272 INFO L125 PetriNetUnfolderBase]: For 5661/5667 co-relation queries the response was YES. [2024-06-04 16:15:09,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5833 conditions, 1567 events. 951/1567 cut-off events. For 5661/5667 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7810 event pairs, 351 based on Foata normal form. 3/1564 useless extension candidates. Maximal degree in co-relation 5806. Up to 1359 conditions per place. [2024-06-04 16:15:09,283 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-04 16:15:09,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 588 flow [2024-06-04 16:15:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-04 16:15:09,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-04 16:15:09,286 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 402 flow. Second operand 5 states and 121 transitions. [2024-06-04 16:15:09,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 588 flow [2024-06-04 16:15:09,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 561 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:09,294 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 421 flow [2024-06-04 16:15:09,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=421, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-04 16:15:09,295 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-04 16:15:09,295 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 421 flow [2024-06-04 16:15:09,295 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 16:15:09,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:09,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:09,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:15:09,296 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:09,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash -194722984, now seen corresponding path program 1 times [2024-06-04 16:15:09,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:09,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192553459] [2024-06-04 16:15:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:09,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:09,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:09,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192553459] [2024-06-04 16:15:09,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192553459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:09,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:09,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:09,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781001690] [2024-06-04 16:15:09,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:09,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:09,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:09,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:09,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:09,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:09,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 421 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:09,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:09,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:09,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:09,663 INFO L124 PetriNetUnfolderBase]: 1099/1788 cut-off events. [2024-06-04 16:15:09,663 INFO L125 PetriNetUnfolderBase]: For 7243/7247 co-relation queries the response was YES. [2024-06-04 16:15:09,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6826 conditions, 1788 events. 1099/1788 cut-off events. For 7243/7247 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9025 event pairs, 320 based on Foata normal form. 10/1789 useless extension candidates. Maximal degree in co-relation 6798. Up to 1435 conditions per place. [2024-06-04 16:15:09,675 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 74 selfloop transitions, 32 changer transitions 0/112 dead transitions. [2024-06-04 16:15:09,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 112 transitions, 861 flow [2024-06-04 16:15:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:09,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:15:09,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-04 16:15:09,677 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 421 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:15:09,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 112 transitions, 861 flow [2024-06-04 16:15:09,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 112 transitions, 798 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:09,688 INFO L231 Difference]: Finished difference. Result has 71 places, 79 transitions, 548 flow [2024-06-04 16:15:09,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=548, PETRI_PLACES=71, PETRI_TRANSITIONS=79} [2024-06-04 16:15:09,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-04 16:15:09,689 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 79 transitions, 548 flow [2024-06-04 16:15:09,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:09,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:09,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:09,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:15:09,690 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 16:15:09,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:09,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1121303404, now seen corresponding path program 2 times [2024-06-04 16:15:09,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:09,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118998794] [2024-06-04 16:15:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:09,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:09,861 INFO 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 16:15:09,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:09,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118998794] [2024-06-04 16:15:09,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118998794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:09,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:09,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:09,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548516951] [2024-06-04 16:15:09,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:09,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:09,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:09,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:09,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 79 transitions, 548 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:09,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:09,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:09,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:10,093 INFO L124 PetriNetUnfolderBase]: 1180/1933 cut-off events. [2024-06-04 16:15:10,094 INFO L125 PetriNetUnfolderBase]: For 10534/10540 co-relation queries the response was YES. [2024-06-04 16:15:10,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8332 conditions, 1933 events. 1180/1933 cut-off events. For 10534/10540 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10033 event pairs, 310 based on Foata normal form. 5/1932 useless extension candidates. Maximal degree in co-relation 8301. Up to 1270 conditions per place. [2024-06-04 16:15:10,106 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 77 selfloop transitions, 57 changer transitions 0/140 dead transitions. [2024-06-04 16:15:10,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 140 transitions, 1212 flow [2024-06-04 16:15:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 16:15:10,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-04 16:15:10,108 INFO L175 Difference]: Start difference. First operand has 71 places, 79 transitions, 548 flow. Second operand 8 states and 199 transitions. [2024-06-04 16:15:10,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 140 transitions, 1212 flow [2024-06-04 16:15:10,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 140 transitions, 1143 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:10,122 INFO L231 Difference]: Finished difference. Result has 79 places, 102 transitions, 858 flow [2024-06-04 16:15:10,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=858, PETRI_PLACES=79, PETRI_TRANSITIONS=102} [2024-06-04 16:15:10,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-04 16:15:10,123 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 102 transitions, 858 flow [2024-06-04 16:15:10,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:10,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:10,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:15:10,123 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 16:15:10,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:10,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1660638336, now seen corresponding path program 3 times [2024-06-04 16:15:10,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:10,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142261719] [2024-06-04 16:15:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:10,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:10,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:10,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142261719] [2024-06-04 16:15:10,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142261719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:10,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:10,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:10,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879998984] [2024-06-04 16:15:10,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:10,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:10,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:10,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:10,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:10,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:10,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 102 transitions, 858 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:10,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:10,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:10,572 INFO L124 PetriNetUnfolderBase]: 1212/1983 cut-off events. [2024-06-04 16:15:10,572 INFO L125 PetriNetUnfolderBase]: For 14427/14433 co-relation queries the response was YES. [2024-06-04 16:15:10,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9935 conditions, 1983 events. 1212/1983 cut-off events. For 14427/14433 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10325 event pairs, 312 based on Foata normal form. 6/1983 useless extension candidates. Maximal degree in co-relation 9899. Up to 1286 conditions per place. [2024-06-04 16:15:10,590 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 83 selfloop transitions, 65 changer transitions 0/154 dead transitions. [2024-06-04 16:15:10,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 154 transitions, 1478 flow [2024-06-04 16:15:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-04 16:15:10,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-04 16:15:10,592 INFO L175 Difference]: Start difference. First operand has 79 places, 102 transitions, 858 flow. Second operand 9 states and 221 transitions. [2024-06-04 16:15:10,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 154 transitions, 1478 flow [2024-06-04 16:15:10,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 154 transitions, 1383 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:10,619 INFO L231 Difference]: Finished difference. Result has 87 places, 114 transitions, 1071 flow [2024-06-04 16:15:10,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1071, PETRI_PLACES=87, PETRI_TRANSITIONS=114} [2024-06-04 16:15:10,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-04 16:15:10,620 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 114 transitions, 1071 flow [2024-06-04 16:15:10,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:10,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:10,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:15:10,621 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 16:15:10,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:10,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1619995816, now seen corresponding path program 1 times [2024-06-04 16:15:10,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:10,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880801207] [2024-06-04 16:15:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:10,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:10,783 INFO 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 16:15:10,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:10,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880801207] [2024-06-04 16:15:10,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880801207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:10,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:10,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:10,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354399436] [2024-06-04 16:15:10,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:10,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:10,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:10,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:10,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:10,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:10,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 1071 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:10,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:10,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:11,061 INFO L124 PetriNetUnfolderBase]: 1215/1985 cut-off events. [2024-06-04 16:15:11,061 INFO L125 PetriNetUnfolderBase]: For 16030/16030 co-relation queries the response was YES. [2024-06-04 16:15:11,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10635 conditions, 1985 events. 1215/1985 cut-off events. For 16030/16030 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10273 event pairs, 291 based on Foata normal form. 6/1989 useless extension candidates. Maximal degree in co-relation 10596. Up to 1746 conditions per place. [2024-06-04 16:15:11,076 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 114 selfloop transitions, 21 changer transitions 0/141 dead transitions. [2024-06-04 16:15:11,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 141 transitions, 1483 flow [2024-06-04 16:15:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:11,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-04 16:15:11,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-04 16:15:11,077 INFO L175 Difference]: Start difference. First operand has 87 places, 114 transitions, 1071 flow. Second operand 8 states and 175 transitions. [2024-06-04 16:15:11,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 141 transitions, 1483 flow [2024-06-04 16:15:11,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 141 transitions, 1400 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:11,102 INFO L231 Difference]: Finished difference. Result has 91 places, 117 transitions, 1084 flow [2024-06-04 16:15:11,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1084, PETRI_PLACES=91, PETRI_TRANSITIONS=117} [2024-06-04 16:15:11,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-04 16:15:11,103 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 117 transitions, 1084 flow [2024-06-04 16:15:11,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:11,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:11,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:15:11,104 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:11,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:11,104 INFO L85 PathProgramCache]: Analyzing trace with hash -85413158, now seen corresponding path program 1 times [2024-06-04 16:15:11,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:11,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994908096] [2024-06-04 16:15:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:11,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:11,263 INFO 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 16:15:11,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:11,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994908096] [2024-06-04 16:15:11,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994908096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:11,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:11,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:11,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79992901] [2024-06-04 16:15:11,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:11,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:11,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:11,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:11,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:11,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:11,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 117 transitions, 1084 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:11,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:11,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:11,485 INFO L124 PetriNetUnfolderBase]: 1212/1980 cut-off events. [2024-06-04 16:15:11,485 INFO L125 PetriNetUnfolderBase]: For 17217/17217 co-relation queries the response was YES. [2024-06-04 16:15:11,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10649 conditions, 1980 events. 1212/1980 cut-off events. For 17217/17217 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10224 event pairs, 314 based on Foata normal form. 1/1979 useless extension candidates. Maximal degree in co-relation 10609. Up to 1802 conditions per place. [2024-06-04 16:15:11,500 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 112 selfloop transitions, 7 changer transitions 0/125 dead transitions. [2024-06-04 16:15:11,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 125 transitions, 1342 flow [2024-06-04 16:15:11,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-04 16:15:11,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:15:11,502 INFO L175 Difference]: Start difference. First operand has 91 places, 117 transitions, 1084 flow. Second operand 4 states and 92 transitions. [2024-06-04 16:15:11,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 125 transitions, 1342 flow [2024-06-04 16:15:11,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 125 transitions, 1260 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:11,527 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 1022 flow [2024-06-04 16:15:11,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1022, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-04 16:15:11,528 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-04 16:15:11,528 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 1022 flow [2024-06-04 16:15:11,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:11,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:11,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:15:11,529 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 16:15:11,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:11,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1112802690, now seen corresponding path program 1 times [2024-06-04 16:15:11,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:11,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251670337] [2024-06-04 16:15:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:11,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:11,670 INFO 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 16:15:11,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:11,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251670337] [2024-06-04 16:15:11,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251670337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:11,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:11,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:11,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932131047] [2024-06-04 16:15:11,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:11,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:11,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:11,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:11,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:11,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:11,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 1022 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 16:15:11,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:11,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:11,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:11,975 INFO L124 PetriNetUnfolderBase]: 1308/2143 cut-off events. [2024-06-04 16:15:11,975 INFO L125 PetriNetUnfolderBase]: For 20437/20441 co-relation queries the response was YES. [2024-06-04 16:15:11,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11474 conditions, 2143 events. 1308/2143 cut-off events. For 20437/20441 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11273 event pairs, 286 based on Foata normal form. 9/2150 useless extension candidates. Maximal degree in co-relation 11433. Up to 1370 conditions per place. [2024-06-04 16:15:11,990 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 94 selfloop transitions, 89 changer transitions 0/189 dead transitions. [2024-06-04 16:15:11,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 189 transitions, 1956 flow [2024-06-04 16:15:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-04 16:15:11,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2024-06-04 16:15:11,991 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 1022 flow. Second operand 9 states and 227 transitions. [2024-06-04 16:15:11,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 189 transitions, 1956 flow [2024-06-04 16:15:12,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 189 transitions, 1942 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:12,017 INFO L231 Difference]: Finished difference. Result has 98 places, 144 transitions, 1618 flow [2024-06-04 16:15:12,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1618, PETRI_PLACES=98, PETRI_TRANSITIONS=144} [2024-06-04 16:15:12,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-04 16:15:12,018 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 144 transitions, 1618 flow [2024-06-04 16:15:12,018 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 16:15:12,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:12,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:12,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:15:12,019 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 16:15:12,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1112808270, now seen corresponding path program 2 times [2024-06-04 16:15:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:12,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593529016] [2024-06-04 16:15:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:12,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:12,154 INFO 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 16:15:12,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:12,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593529016] [2024-06-04 16:15:12,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593529016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:12,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:12,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:12,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843604603] [2024-06-04 16:15:12,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:12,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:12,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:12,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:12,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:12,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:12,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 144 transitions, 1618 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 16:15:12,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:12,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:12,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:12,462 INFO L124 PetriNetUnfolderBase]: 1324/2174 cut-off events. [2024-06-04 16:15:12,462 INFO L125 PetriNetUnfolderBase]: For 25590/25594 co-relation queries the response was YES. [2024-06-04 16:15:12,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13130 conditions, 2174 events. 1324/2174 cut-off events. For 25590/25594 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11486 event pairs, 285 based on Foata normal form. 9/2181 useless extension candidates. Maximal degree in co-relation 13085. Up to 1387 conditions per place. [2024-06-04 16:15:12,519 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 93 selfloop transitions, 92 changer transitions 0/191 dead transitions. [2024-06-04 16:15:12,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 191 transitions, 2383 flow [2024-06-04 16:15:12,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 16:15:12,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-04 16:15:12,520 INFO L175 Difference]: Start difference. First operand has 98 places, 144 transitions, 1618 flow. Second operand 8 states and 202 transitions. [2024-06-04 16:15:12,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 191 transitions, 2383 flow [2024-06-04 16:15:12,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 191 transitions, 2280 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:12,560 INFO L231 Difference]: Finished difference. Result has 104 places, 154 transitions, 1903 flow [2024-06-04 16:15:12,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1903, PETRI_PLACES=104, PETRI_TRANSITIONS=154} [2024-06-04 16:15:12,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-04 16:15:12,561 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 154 transitions, 1903 flow [2024-06-04 16:15:12,561 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 16:15:12,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:12,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:12,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:15:12,562 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 16:15:12,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:12,562 INFO L85 PathProgramCache]: Analyzing trace with hash -400665934, now seen corresponding path program 3 times [2024-06-04 16:15:12,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:12,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470854378] [2024-06-04 16:15:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:12,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:12,689 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 16:15:12,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:12,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470854378] [2024-06-04 16:15:12,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470854378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:12,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:12,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:12,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545767064] [2024-06-04 16:15:12,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:12,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:12,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:12,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:12,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:12,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:12,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 154 transitions, 1903 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 16:15:12,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:12,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:12,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:13,025 INFO L124 PetriNetUnfolderBase]: 1341/2214 cut-off events. [2024-06-04 16:15:13,026 INFO L125 PetriNetUnfolderBase]: For 29167/29177 co-relation queries the response was YES. [2024-06-04 16:15:13,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14084 conditions, 2214 events. 1341/2214 cut-off events. For 29167/29177 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11877 event pairs, 329 based on Foata normal form. 9/2219 useless extension candidates. Maximal degree in co-relation 14036. Up to 1407 conditions per place. [2024-06-04 16:15:13,046 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 97 selfloop transitions, 82 changer transitions 0/185 dead transitions. [2024-06-04 16:15:13,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 185 transitions, 2507 flow [2024-06-04 16:15:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:15:13,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 16:15:13,048 INFO L175 Difference]: Start difference. First operand has 104 places, 154 transitions, 1903 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:15:13,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 185 transitions, 2507 flow [2024-06-04 16:15:13,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 185 transitions, 2363 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:13,099 INFO L231 Difference]: Finished difference. Result has 108 places, 163 transitions, 2111 flow [2024-06-04 16:15:13,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2111, PETRI_PLACES=108, PETRI_TRANSITIONS=163} [2024-06-04 16:15:13,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-04 16:15:13,100 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 163 transitions, 2111 flow [2024-06-04 16:15:13,100 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 16:15:13,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:13,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:13,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:15:13,100 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:13,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:13,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1610518182, now seen corresponding path program 1 times [2024-06-04 16:15:13,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:13,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101073071] [2024-06-04 16:15:13,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:13,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:13,281 INFO 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 16:15:13,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:13,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101073071] [2024-06-04 16:15:13,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101073071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:13,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:13,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:13,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945114070] [2024-06-04 16:15:13,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:13,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:13,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:13,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:13,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:13,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:13,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 163 transitions, 2111 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:13,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:13,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:13,543 INFO L124 PetriNetUnfolderBase]: 1337/2210 cut-off events. [2024-06-04 16:15:13,544 INFO L125 PetriNetUnfolderBase]: For 31893/31901 co-relation queries the response was YES. [2024-06-04 16:15:13,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14469 conditions, 2210 events. 1337/2210 cut-off events. For 31893/31901 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 11825 event pairs, 313 based on Foata normal form. 8/2215 useless extension candidates. Maximal degree in co-relation 14419. Up to 1941 conditions per place. [2024-06-04 16:15:13,561 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 153 selfloop transitions, 18 changer transitions 0/177 dead transitions. [2024-06-04 16:15:13,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 177 transitions, 2585 flow [2024-06-04 16:15:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:13,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-04 16:15:13,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-04 16:15:13,562 INFO L175 Difference]: Start difference. First operand has 108 places, 163 transitions, 2111 flow. Second operand 5 states and 114 transitions. [2024-06-04 16:15:13,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 177 transitions, 2585 flow [2024-06-04 16:15:13,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 177 transitions, 2459 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:13,608 INFO L231 Difference]: Finished difference. Result has 111 places, 167 transitions, 2123 flow [2024-06-04 16:15:13,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2123, PETRI_PLACES=111, PETRI_TRANSITIONS=167} [2024-06-04 16:15:13,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-04 16:15:13,609 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 167 transitions, 2123 flow [2024-06-04 16:15:13,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:13,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:13,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:15:13,610 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 16:15:13,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:13,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1731486651, now seen corresponding path program 1 times [2024-06-04 16:15:13,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:13,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233468939] [2024-06-04 16:15:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:13,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:13,732 INFO 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 16:15:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:13,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233468939] [2024-06-04 16:15:13,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233468939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:13,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:13,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:13,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639450020] [2024-06-04 16:15:13,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:13,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:13,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:13,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:13,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:13,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 167 transitions, 2123 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:13,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:13,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:14,029 INFO L124 PetriNetUnfolderBase]: 1354/2234 cut-off events. [2024-06-04 16:15:14,029 INFO L125 PetriNetUnfolderBase]: For 34041/34045 co-relation queries the response was YES. [2024-06-04 16:15:14,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14330 conditions, 2234 events. 1354/2234 cut-off events. For 34041/34045 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11956 event pairs, 206 based on Foata normal form. 8/2240 useless extension candidates. Maximal degree in co-relation 14278. Up to 1833 conditions per place. [2024-06-04 16:15:14,079 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 169 selfloop transitions, 22 changer transitions 0/197 dead transitions. [2024-06-04 16:15:14,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 197 transitions, 2709 flow [2024-06-04 16:15:14,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:14,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:15:14,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-04 16:15:14,081 INFO L175 Difference]: Start difference. First operand has 111 places, 167 transitions, 2123 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:15:14,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 197 transitions, 2709 flow [2024-06-04 16:15:14,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 197 transitions, 2655 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-04 16:15:14,137 INFO L231 Difference]: Finished difference. Result has 116 places, 171 transitions, 2200 flow [2024-06-04 16:15:14,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2200, PETRI_PLACES=116, PETRI_TRANSITIONS=171} [2024-06-04 16:15:14,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-04 16:15:14,138 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 171 transitions, 2200 flow [2024-06-04 16:15:14,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:14,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:14,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:15:14,139 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:14,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:14,139 INFO L85 PathProgramCache]: Analyzing trace with hash 501397417, now seen corresponding path program 2 times [2024-06-04 16:15:14,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:14,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423757211] [2024-06-04 16:15:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:14,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:14,260 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 16:15:14,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:14,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423757211] [2024-06-04 16:15:14,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423757211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:14,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:14,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:14,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478668413] [2024-06-04 16:15:14,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:14,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:14,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:14,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:14,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:14,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:14,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 171 transitions, 2200 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:14,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:14,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:14,554 INFO L124 PetriNetUnfolderBase]: 1346/2222 cut-off events. [2024-06-04 16:15:14,554 INFO L125 PetriNetUnfolderBase]: For 36288/36292 co-relation queries the response was YES. [2024-06-04 16:15:14,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14465 conditions, 2222 events. 1346/2222 cut-off events. For 36288/36292 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11882 event pairs, 290 based on Foata normal form. 8/2228 useless extension candidates. Maximal degree in co-relation 14411. Up to 1898 conditions per place. [2024-06-04 16:15:14,575 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 168 selfloop transitions, 20 changer transitions 0/194 dead transitions. [2024-06-04 16:15:14,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 194 transitions, 2634 flow [2024-06-04 16:15:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 16:15:14,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-04 16:15:14,576 INFO L175 Difference]: Start difference. First operand has 116 places, 171 transitions, 2200 flow. Second operand 6 states and 143 transitions. [2024-06-04 16:15:14,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 194 transitions, 2634 flow [2024-06-04 16:15:14,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 194 transitions, 2507 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:14,640 INFO L231 Difference]: Finished difference. Result has 119 places, 171 transitions, 2120 flow [2024-06-04 16:15:14,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2120, PETRI_PLACES=119, PETRI_TRANSITIONS=171} [2024-06-04 16:15:14,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-04 16:15:14,641 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 171 transitions, 2120 flow [2024-06-04 16:15:14,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:14,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:14,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:15:14,641 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 16:15:14,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash 137326199, now seen corresponding path program 1 times [2024-06-04 16:15:14,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:14,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522315709] [2024-06-04 16:15:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:14,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:14,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:14,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522315709] [2024-06-04 16:15:14,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522315709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:14,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:14,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:14,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950637654] [2024-06-04 16:15:14,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:14,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:14,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:14,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:14,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:14,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 171 transitions, 2120 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:14,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:14,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:15,188 INFO L124 PetriNetUnfolderBase]: 1605/2662 cut-off events. [2024-06-04 16:15:15,189 INFO L125 PetriNetUnfolderBase]: For 52088/52092 co-relation queries the response was YES. [2024-06-04 16:15:15,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16156 conditions, 2662 events. 1605/2662 cut-off events. For 52088/52092 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14972 event pairs, 323 based on Foata normal form. 72/2732 useless extension candidates. Maximal degree in co-relation 16100. Up to 1463 conditions per place. [2024-06-04 16:15:15,210 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 105 selfloop transitions, 107 changer transitions 0/218 dead transitions. [2024-06-04 16:15:15,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 218 transitions, 2830 flow [2024-06-04 16:15:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-04 16:15:15,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024390243902439 [2024-06-04 16:15:15,212 INFO L175 Difference]: Start difference. First operand has 119 places, 171 transitions, 2120 flow. Second operand 10 states and 247 transitions. [2024-06-04 16:15:15,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 218 transitions, 2830 flow [2024-06-04 16:15:15,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 218 transitions, 2776 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:15,271 INFO L231 Difference]: Finished difference. Result has 125 places, 174 transitions, 2365 flow [2024-06-04 16:15:15,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2066, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2365, PETRI_PLACES=125, PETRI_TRANSITIONS=174} [2024-06-04 16:15:15,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-04 16:15:15,272 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 174 transitions, 2365 flow [2024-06-04 16:15:15,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:15,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:15,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:15:15,273 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:15,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:15,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1557400975, now seen corresponding path program 1 times [2024-06-04 16:15:15,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:15,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262648289] [2024-06-04 16:15:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:15,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:15,414 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 16:15:15,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262648289] [2024-06-04 16:15:15,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262648289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:15,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:15,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:15,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454322719] [2024-06-04 16:15:15,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:15,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:15,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:15,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:15,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:15,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 174 transitions, 2365 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:15,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:15,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:15,718 INFO L124 PetriNetUnfolderBase]: 1602/2660 cut-off events. [2024-06-04 16:15:15,719 INFO L125 PetriNetUnfolderBase]: For 46858/46858 co-relation queries the response was YES. [2024-06-04 16:15:15,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17250 conditions, 2660 events. 1602/2660 cut-off events. For 46858/46858 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14930 event pairs, 347 based on Foata normal form. 1/2659 useless extension candidates. Maximal degree in co-relation 17192. Up to 2395 conditions per place. [2024-06-04 16:15:15,739 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 167 selfloop transitions, 20 changer transitions 0/193 dead transitions. [2024-06-04 16:15:15,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 193 transitions, 2838 flow [2024-06-04 16:15:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:15,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-04 16:15:15,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-04 16:15:15,743 INFO L175 Difference]: Start difference. First operand has 125 places, 174 transitions, 2365 flow. Second operand 7 states and 153 transitions. [2024-06-04 16:15:15,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 193 transitions, 2838 flow [2024-06-04 16:15:15,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 193 transitions, 2608 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-04 16:15:15,816 INFO L231 Difference]: Finished difference. Result has 123 places, 175 transitions, 2194 flow [2024-06-04 16:15:15,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2194, PETRI_PLACES=123, PETRI_TRANSITIONS=175} [2024-06-04 16:15:15,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-04 16:15:15,817 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 175 transitions, 2194 flow [2024-06-04 16:15:15,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:15,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:15,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:15:15,818 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 16:15:15,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:15,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1813118121, now seen corresponding path program 2 times [2024-06-04 16:15:15,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:15,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606885686] [2024-06-04 16:15:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:15,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:15,969 INFO 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 16:15:15,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:15,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606885686] [2024-06-04 16:15:15,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606885686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:15,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:15,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:15,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347918797] [2024-06-04 16:15:15,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:15,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:15,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:15,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:15,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:16,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:16,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 175 transitions, 2194 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:16,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:16,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:16,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:16,362 INFO L124 PetriNetUnfolderBase]: 1668/2757 cut-off events. [2024-06-04 16:15:16,362 INFO L125 PetriNetUnfolderBase]: For 50499/50505 co-relation queries the response was YES. [2024-06-04 16:15:16,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16761 conditions, 2757 events. 1668/2757 cut-off events. For 50499/50505 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15502 event pairs, 353 based on Foata normal form. 15/2767 useless extension candidates. Maximal degree in co-relation 16705. Up to 1902 conditions per place. [2024-06-04 16:15:16,382 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 107 selfloop transitions, 100 changer transitions 0/213 dead transitions. [2024-06-04 16:15:16,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 213 transitions, 2890 flow [2024-06-04 16:15:16,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-04 16:15:16,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-04 16:15:16,383 INFO L175 Difference]: Start difference. First operand has 123 places, 175 transitions, 2194 flow. Second operand 9 states and 221 transitions. [2024-06-04 16:15:16,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 213 transitions, 2890 flow [2024-06-04 16:15:16,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 213 transitions, 2721 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:16,450 INFO L231 Difference]: Finished difference. Result has 125 places, 178 transitions, 2298 flow [2024-06-04 16:15:16,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2298, PETRI_PLACES=125, PETRI_TRANSITIONS=178} [2024-06-04 16:15:16,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-04 16:15:16,451 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 178 transitions, 2298 flow [2024-06-04 16:15:16,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:16,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:16,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:16,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:15:16,452 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 16:15:16,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:16,452 INFO L85 PathProgramCache]: Analyzing trace with hash 785308929, now seen corresponding path program 3 times [2024-06-04 16:15:16,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:16,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045944808] [2024-06-04 16:15:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:16,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:16,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:16,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045944808] [2024-06-04 16:15:16,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045944808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:16,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:16,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:16,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922462062] [2024-06-04 16:15:16,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:16,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:16,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:16,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:16,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:16,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:16,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 178 transitions, 2298 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:16,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:16,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:16,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:16,997 INFO L124 PetriNetUnfolderBase]: 1734/2863 cut-off events. [2024-06-04 16:15:16,997 INFO L125 PetriNetUnfolderBase]: For 55378/55384 co-relation queries the response was YES. [2024-06-04 16:15:17,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18107 conditions, 2863 events. 1734/2863 cut-off events. For 55378/55384 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16185 event pairs, 364 based on Foata normal form. 15/2873 useless extension candidates. Maximal degree in co-relation 18050. Up to 2005 conditions per place. [2024-06-04 16:15:17,018 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 117 selfloop transitions, 100 changer transitions 0/223 dead transitions. [2024-06-04 16:15:17,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 223 transitions, 3044 flow [2024-06-04 16:15:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:17,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-04 16:15:17,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-04 16:15:17,020 INFO L175 Difference]: Start difference. First operand has 125 places, 178 transitions, 2298 flow. Second operand 10 states and 244 transitions. [2024-06-04 16:15:17,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 223 transitions, 3044 flow [2024-06-04 16:15:17,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 223 transitions, 2803 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:17,091 INFO L231 Difference]: Finished difference. Result has 128 places, 181 transitions, 2337 flow [2024-06-04 16:15:17,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2337, PETRI_PLACES=128, PETRI_TRANSITIONS=181} [2024-06-04 16:15:17,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-04 16:15:17,092 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 181 transitions, 2337 flow [2024-06-04 16:15:17,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:17,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:17,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:15:17,092 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 16:15:17,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:17,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1812821451, now seen corresponding path program 4 times [2024-06-04 16:15:17,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:17,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582345765] [2024-06-04 16:15:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:17,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:17,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:17,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582345765] [2024-06-04 16:15:17,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582345765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:17,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:17,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:17,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997212566] [2024-06-04 16:15:17,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:17,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:17,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:17,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:17,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:17,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 181 transitions, 2337 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:17,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:17,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:17,674 INFO L124 PetriNetUnfolderBase]: 1994/3311 cut-off events. [2024-06-04 16:15:17,675 INFO L125 PetriNetUnfolderBase]: For 71704/71710 co-relation queries the response was YES. [2024-06-04 16:15:17,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20735 conditions, 3311 events. 1994/3311 cut-off events. For 71704/71710 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19505 event pairs, 411 based on Foata normal form. 15/3321 useless extension candidates. Maximal degree in co-relation 20677. Up to 1450 conditions per place. [2024-06-04 16:15:17,701 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 115 selfloop transitions, 107 changer transitions 0/228 dead transitions. [2024-06-04 16:15:17,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 228 transitions, 3193 flow [2024-06-04 16:15:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-04 16:15:17,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2024-06-04 16:15:17,703 INFO L175 Difference]: Start difference. First operand has 128 places, 181 transitions, 2337 flow. Second operand 9 states and 227 transitions. [2024-06-04 16:15:17,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 228 transitions, 3193 flow [2024-06-04 16:15:17,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 228 transitions, 2947 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:17,784 INFO L231 Difference]: Finished difference. Result has 130 places, 186 transitions, 2447 flow [2024-06-04 16:15:17,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2447, PETRI_PLACES=130, PETRI_TRANSITIONS=186} [2024-06-04 16:15:17,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-04 16:15:17,784 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 186 transitions, 2447 flow [2024-06-04 16:15:17,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:17,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:17,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:15:17,785 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:17,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1613556053, now seen corresponding path program 2 times [2024-06-04 16:15:17,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:17,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095270429] [2024-06-04 16:15:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:17,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:17,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:17,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095270429] [2024-06-04 16:15:17,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095270429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:17,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:17,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:17,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960796338] [2024-06-04 16:15:17,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:17,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:17,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:17,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:17,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:17,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:17,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 186 transitions, 2447 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:17,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:17,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:18,356 INFO L124 PetriNetUnfolderBase]: 1986/3305 cut-off events. [2024-06-04 16:15:18,357 INFO L125 PetriNetUnfolderBase]: For 72776/72784 co-relation queries the response was YES. [2024-06-04 16:15:18,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21137 conditions, 3305 events. 1986/3305 cut-off events. For 72776/72784 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19412 event pairs, 530 based on Foata normal form. 8/3310 useless extension candidates. Maximal degree in co-relation 21077. Up to 3011 conditions per place. [2024-06-04 16:15:18,379 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 171 selfloop transitions, 18 changer transitions 0/195 dead transitions. [2024-06-04 16:15:18,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 195 transitions, 2847 flow [2024-06-04 16:15:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-04 16:15:18,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-04 16:15:18,380 INFO L175 Difference]: Start difference. First operand has 130 places, 186 transitions, 2447 flow. Second operand 5 states and 113 transitions. [2024-06-04 16:15:18,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 195 transitions, 2847 flow [2024-06-04 16:15:18,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 195 transitions, 2629 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:18,463 INFO L231 Difference]: Finished difference. Result has 130 places, 186 transitions, 2273 flow [2024-06-04 16:15:18,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2273, PETRI_PLACES=130, PETRI_TRANSITIONS=186} [2024-06-04 16:15:18,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-04 16:15:18,464 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 186 transitions, 2273 flow [2024-06-04 16:15:18,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:18,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:18,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:18,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:15:18,464 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:18,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash -477826661, now seen corresponding path program 1 times [2024-06-04 16:15:18,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:18,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805803982] [2024-06-04 16:15:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:18,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:18,609 INFO 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 16:15:18,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:18,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805803982] [2024-06-04 16:15:18,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805803982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:18,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:18,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:18,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632230093] [2024-06-04 16:15:18,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:18,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:18,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:18,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:18,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:18,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:18,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 186 transitions, 2273 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:18,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:18,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:18,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:19,068 INFO L124 PetriNetUnfolderBase]: 1988/3306 cut-off events. [2024-06-04 16:15:19,069 INFO L125 PetriNetUnfolderBase]: For 72686/72686 co-relation queries the response was YES. [2024-06-04 16:15:19,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20678 conditions, 3306 events. 1988/3306 cut-off events. For 72686/72686 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19471 event pairs, 517 based on Foata normal form. 2/3306 useless extension candidates. Maximal degree in co-relation 20616. Up to 3012 conditions per place. [2024-06-04 16:15:19,098 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 181 selfloop transitions, 20 changer transitions 0/207 dead transitions. [2024-06-04 16:15:19,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 207 transitions, 2806 flow [2024-06-04 16:15:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-04 16:15:19,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-04 16:15:19,099 INFO L175 Difference]: Start difference. First operand has 130 places, 186 transitions, 2273 flow. Second operand 7 states and 153 transitions. [2024-06-04 16:15:19,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 207 transitions, 2806 flow [2024-06-04 16:15:19,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 207 transitions, 2770 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:19,201 INFO L231 Difference]: Finished difference. Result has 133 places, 189 transitions, 2322 flow [2024-06-04 16:15:19,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2322, PETRI_PLACES=133, PETRI_TRANSITIONS=189} [2024-06-04 16:15:19,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-04 16:15:19,201 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 189 transitions, 2322 flow [2024-06-04 16:15:19,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:19,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:19,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:19,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:15:19,202 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:19,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:19,202 INFO L85 PathProgramCache]: Analyzing trace with hash -477619271, now seen corresponding path program 2 times [2024-06-04 16:15:19,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:19,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623719129] [2024-06-04 16:15:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:19,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:19,373 INFO 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 16:15:19,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:19,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623719129] [2024-06-04 16:15:19,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623719129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:19,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:19,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:19,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921081877] [2024-06-04 16:15:19,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:19,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:19,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:19,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:19,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 189 transitions, 2322 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:19,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:19,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:19,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:19,807 INFO L124 PetriNetUnfolderBase]: 1970/3277 cut-off events. [2024-06-04 16:15:19,807 INFO L125 PetriNetUnfolderBase]: For 76399/76403 co-relation queries the response was YES. [2024-06-04 16:15:19,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20682 conditions, 3277 events. 1970/3277 cut-off events. For 76399/76403 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19269 event pairs, 520 based on Foata normal form. 5/3280 useless extension candidates. Maximal degree in co-relation 20619. Up to 2986 conditions per place. [2024-06-04 16:15:19,834 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 176 selfloop transitions, 20 changer transitions 0/202 dead transitions. [2024-06-04 16:15:19,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 2746 flow [2024-06-04 16:15:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-04 16:15:19,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-04 16:15:19,835 INFO L175 Difference]: Start difference. First operand has 133 places, 189 transitions, 2322 flow. Second operand 6 states and 133 transitions. [2024-06-04 16:15:19,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 2746 flow [2024-06-04 16:15:19,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 202 transitions, 2713 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:19,930 INFO L231 Difference]: Finished difference. Result has 135 places, 189 transitions, 2335 flow [2024-06-04 16:15:19,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2335, PETRI_PLACES=135, PETRI_TRANSITIONS=189} [2024-06-04 16:15:19,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-04 16:15:19,931 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 189 transitions, 2335 flow [2024-06-04 16:15:19,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:19,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:19,931 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 16:15:19,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:15:19,931 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 16:15:19,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1881980671, now seen corresponding path program 1 times [2024-06-04 16:15:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:19,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345544496] [2024-06-04 16:15:19,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:19,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:20,073 INFO 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 16:15:20,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:20,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345544496] [2024-06-04 16:15:20,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345544496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:20,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:20,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:20,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341523791] [2024-06-04 16:15:20,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:20,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:20,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:20,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:20,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:20,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 189 transitions, 2335 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 16:15:20,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:20,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:20,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:20,666 INFO L124 PetriNetUnfolderBase]: 2658/4410 cut-off events. [2024-06-04 16:15:20,666 INFO L125 PetriNetUnfolderBase]: For 142128/142132 co-relation queries the response was YES. [2024-06-04 16:15:20,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28482 conditions, 4410 events. 2658/4410 cut-off events. For 142128/142132 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27714 event pairs, 438 based on Foata normal form. 52/4440 useless extension candidates. Maximal degree in co-relation 28418. Up to 1627 conditions per place. [2024-06-04 16:15:20,704 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 147 selfloop transitions, 104 changer transitions 0/257 dead transitions. [2024-06-04 16:15:20,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 257 transitions, 3511 flow [2024-06-04 16:15:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-04 16:15:20,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476964769647696 [2024-06-04 16:15:20,706 INFO L175 Difference]: Start difference. First operand has 135 places, 189 transitions, 2335 flow. Second operand 9 states and 239 transitions. [2024-06-04 16:15:20,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 257 transitions, 3511 flow [2024-06-04 16:15:20,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 257 transitions, 3454 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:20,873 INFO L231 Difference]: Finished difference. Result has 140 places, 197 transitions, 2726 flow [2024-06-04 16:15:20,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2726, PETRI_PLACES=140, PETRI_TRANSITIONS=197} [2024-06-04 16:15:20,874 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-04 16:15:20,874 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 197 transitions, 2726 flow [2024-06-04 16:15:20,874 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 16:15:20,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:20,874 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 16:15:20,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:15:20,875 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 16:15:20,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:20,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1636547849, now seen corresponding path program 2 times [2024-06-04 16:15:20,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:20,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447189182] [2024-06-04 16:15:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:20,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:21,028 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 16:15:21,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:21,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447189182] [2024-06-04 16:15:21,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447189182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:21,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:21,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:21,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945232570] [2024-06-04 16:15:21,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:21,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:21,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:21,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:21,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:21,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 197 transitions, 2726 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 16:15:21,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:21,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:21,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:21,674 INFO L124 PetriNetUnfolderBase]: 2974/4974 cut-off events. [2024-06-04 16:15:21,674 INFO L125 PetriNetUnfolderBase]: For 170585/170589 co-relation queries the response was YES. [2024-06-04 16:15:21,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33476 conditions, 4974 events. 2974/4974 cut-off events. For 170585/170589 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 32389 event pairs, 769 based on Foata normal form. 52/5010 useless extension candidates. Maximal degree in co-relation 33409. Up to 3181 conditions per place. [2024-06-04 16:15:21,722 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 140 selfloop transitions, 111 changer transitions 0/257 dead transitions. [2024-06-04 16:15:21,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 257 transitions, 3764 flow [2024-06-04 16:15:21,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:21,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:21,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-04 16:15:21,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-04 16:15:21,723 INFO L175 Difference]: Start difference. First operand has 140 places, 197 transitions, 2726 flow. Second operand 10 states and 255 transitions. [2024-06-04 16:15:21,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 257 transitions, 3764 flow [2024-06-04 16:15:21,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 257 transitions, 3496 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:21,965 INFO L231 Difference]: Finished difference. Result has 146 places, 203 transitions, 2862 flow [2024-06-04 16:15:21,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2462, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2862, PETRI_PLACES=146, PETRI_TRANSITIONS=203} [2024-06-04 16:15:21,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-04 16:15:21,966 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 203 transitions, 2862 flow [2024-06-04 16:15:21,966 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 16:15:21,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:21,967 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 16:15:21,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:15:21,967 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:21,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:21,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1164809681, now seen corresponding path program 1 times [2024-06-04 16:15:21,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:21,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576936772] [2024-06-04 16:15:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:21,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:22,100 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 16:15:22,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:22,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576936772] [2024-06-04 16:15:22,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576936772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:22,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:22,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:22,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828266978] [2024-06-04 16:15:22,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:22,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:22,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:22,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:22,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:22,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 203 transitions, 2862 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:22,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:22,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:22,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:22,740 INFO L124 PetriNetUnfolderBase]: 2994/5024 cut-off events. [2024-06-04 16:15:22,740 INFO L125 PetriNetUnfolderBase]: For 161376/161380 co-relation queries the response was YES. [2024-06-04 16:15:22,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33968 conditions, 5024 events. 2994/5024 cut-off events. For 161376/161380 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32842 event pairs, 911 based on Foata normal form. 8/5030 useless extension candidates. Maximal degree in co-relation 33899. Up to 4108 conditions per place. [2024-06-04 16:15:22,789 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 125 selfloop transitions, 117 changer transitions 0/248 dead transitions. [2024-06-04 16:15:22,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 248 transitions, 3764 flow [2024-06-04 16:15:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:22,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:15:22,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 16:15:22,790 INFO L175 Difference]: Start difference. First operand has 146 places, 203 transitions, 2862 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:15:22,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 248 transitions, 3764 flow [2024-06-04 16:15:23,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 248 transitions, 3526 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:23,039 INFO L231 Difference]: Finished difference. Result has 149 places, 211 transitions, 3020 flow [2024-06-04 16:15:23,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3020, PETRI_PLACES=149, PETRI_TRANSITIONS=211} [2024-06-04 16:15:23,039 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-04 16:15:23,040 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 211 transitions, 3020 flow [2024-06-04 16:15:23,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:23,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:23,040 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 16:15:23,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:15:23,040 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 16:15:23,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash -441786471, now seen corresponding path program 3 times [2024-06-04 16:15:23,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:23,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789845465] [2024-06-04 16:15:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:23,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:23,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:23,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789845465] [2024-06-04 16:15:23,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789845465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:23,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:23,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:23,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653454040] [2024-06-04 16:15:23,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:23,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:23,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:23,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:23,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:23,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:23,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 211 transitions, 3020 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 16:15:23,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:23,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:23,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:23,974 INFO L124 PetriNetUnfolderBase]: 3426/5818 cut-off events. [2024-06-04 16:15:23,974 INFO L125 PetriNetUnfolderBase]: For 212009/212013 co-relation queries the response was YES. [2024-06-04 16:15:24,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38903 conditions, 5818 events. 3426/5818 cut-off events. For 212009/212013 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 39863 event pairs, 909 based on Foata normal form. 46/5862 useless extension candidates. Maximal degree in co-relation 38832. Up to 3831 conditions per place. [2024-06-04 16:15:24,028 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 149 selfloop transitions, 120 changer transitions 0/275 dead transitions. [2024-06-04 16:15:24,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 275 transitions, 4180 flow [2024-06-04 16:15:24,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-04 16:15:24,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-04 16:15:24,029 INFO L175 Difference]: Start difference. First operand has 149 places, 211 transitions, 3020 flow. Second operand 10 states and 258 transitions. [2024-06-04 16:15:24,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 275 transitions, 4180 flow [2024-06-04 16:15:24,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 275 transitions, 3981 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:24,333 INFO L231 Difference]: Finished difference. Result has 154 places, 216 transitions, 3228 flow [2024-06-04 16:15:24,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3228, PETRI_PLACES=154, PETRI_TRANSITIONS=216} [2024-06-04 16:15:24,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-04 16:15:24,334 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 216 transitions, 3228 flow [2024-06-04 16:15:24,334 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 16:15:24,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:24,334 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 16:15:24,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:15:24,334 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 16:15:24,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:24,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1809075283, now seen corresponding path program 4 times [2024-06-04 16:15:24,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:24,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093773850] [2024-06-04 16:15:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:24,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:24,479 INFO 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 16:15:24,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:24,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093773850] [2024-06-04 16:15:24,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093773850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:24,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:24,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:24,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695271894] [2024-06-04 16:15:24,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:24,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:24,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:24,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:24,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:24,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:24,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 216 transitions, 3228 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 16:15:24,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:24,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:24,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:25,358 INFO L124 PetriNetUnfolderBase]: 3623/6179 cut-off events. [2024-06-04 16:15:25,359 INFO L125 PetriNetUnfolderBase]: For 235114/235118 co-relation queries the response was YES. [2024-06-04 16:15:25,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41410 conditions, 6179 events. 3623/6179 cut-off events. For 235114/235118 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 43151 event pairs, 1199 based on Foata normal form. 54/6231 useless extension candidates. Maximal degree in co-relation 41337. Up to 4837 conditions per place. [2024-06-04 16:15:25,416 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 143 selfloop transitions, 111 changer transitions 0/260 dead transitions. [2024-06-04 16:15:25,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 260 transitions, 4050 flow [2024-06-04 16:15:25,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:25,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-04 16:15:25,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:15:25,417 INFO L175 Difference]: Start difference. First operand has 154 places, 216 transitions, 3228 flow. Second operand 9 states and 225 transitions. [2024-06-04 16:15:25,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 260 transitions, 4050 flow [2024-06-04 16:15:25,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 260 transitions, 3816 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:25,685 INFO L231 Difference]: Finished difference. Result has 157 places, 218 transitions, 3301 flow [2024-06-04 16:15:25,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2996, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3301, PETRI_PLACES=157, PETRI_TRANSITIONS=218} [2024-06-04 16:15:25,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-04 16:15:25,686 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 218 transitions, 3301 flow [2024-06-04 16:15:25,686 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 16:15:25,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:25,686 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 16:15:25,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:15:25,686 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 16:15:25,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1814437663, now seen corresponding path program 5 times [2024-06-04 16:15:25,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:25,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901817880] [2024-06-04 16:15:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:25,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:25,823 INFO 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 16:15:25,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:25,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901817880] [2024-06-04 16:15:25,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901817880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:25,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:25,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:25,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999328900] [2024-06-04 16:15:25,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:25,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:25,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:25,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:25,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:25,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:25,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 218 transitions, 3301 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 16:15:25,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:25,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:25,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:26,700 INFO L124 PetriNetUnfolderBase]: 3820/6498 cut-off events. [2024-06-04 16:15:26,700 INFO L125 PetriNetUnfolderBase]: For 251804/251808 co-relation queries the response was YES. [2024-06-04 16:15:26,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43316 conditions, 6498 events. 3820/6498 cut-off events. For 251804/251808 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45711 event pairs, 1284 based on Foata normal form. 54/6550 useless extension candidates. Maximal degree in co-relation 43241. Up to 5176 conditions per place. [2024-06-04 16:15:26,763 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 146 selfloop transitions, 118 changer transitions 0/270 dead transitions. [2024-06-04 16:15:26,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 270 transitions, 4235 flow [2024-06-04 16:15:26,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-04 16:15:26,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6121951219512195 [2024-06-04 16:15:26,765 INFO L175 Difference]: Start difference. First operand has 157 places, 218 transitions, 3301 flow. Second operand 10 states and 251 transitions. [2024-06-04 16:15:26,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 270 transitions, 4235 flow [2024-06-04 16:15:27,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 270 transitions, 3968 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:27,074 INFO L231 Difference]: Finished difference. Result has 160 places, 220 transitions, 3357 flow [2024-06-04 16:15:27,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3034, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3357, PETRI_PLACES=160, PETRI_TRANSITIONS=220} [2024-06-04 16:15:27,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-04 16:15:27,074 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 220 transitions, 3357 flow [2024-06-04 16:15:27,075 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 16:15:27,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:27,075 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 16:15:27,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:15:27,075 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 16:15:27,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:27,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1808860081, now seen corresponding path program 1 times [2024-06-04 16:15:27,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:27,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681559966] [2024-06-04 16:15:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:27,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:27,200 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 16:15:27,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:27,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681559966] [2024-06-04 16:15:27,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681559966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:27,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:27,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:27,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821052054] [2024-06-04 16:15:27,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:27,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:27,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:27,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:27,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:27,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:27,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 220 transitions, 3357 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 16:15:27,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:27,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:27,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:28,119 INFO L124 PetriNetUnfolderBase]: 3978/6818 cut-off events. [2024-06-04 16:15:28,119 INFO L125 PetriNetUnfolderBase]: For 265612/265616 co-relation queries the response was YES. [2024-06-04 16:15:28,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44701 conditions, 6818 events. 3978/6818 cut-off events. For 265612/265616 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 49024 event pairs, 1199 based on Foata normal form. 46/6847 useless extension candidates. Maximal degree in co-relation 44625. Up to 4320 conditions per place. [2024-06-04 16:15:28,178 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 146 selfloop transitions, 118 changer transitions 0/270 dead transitions. [2024-06-04 16:15:28,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 270 transitions, 4236 flow [2024-06-04 16:15:28,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-04 16:15:28,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205962059620597 [2024-06-04 16:15:28,180 INFO L175 Difference]: Start difference. First operand has 160 places, 220 transitions, 3357 flow. Second operand 9 states and 229 transitions. [2024-06-04 16:15:28,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 270 transitions, 4236 flow [2024-06-04 16:15:28,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 270 transitions, 3991 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:28,528 INFO L231 Difference]: Finished difference. Result has 162 places, 222 transitions, 3433 flow [2024-06-04 16:15:28,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3433, PETRI_PLACES=162, PETRI_TRANSITIONS=222} [2024-06-04 16:15:28,528 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-04 16:15:28,528 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 222 transitions, 3433 flow [2024-06-04 16:15:28,529 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 16:15:28,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:28,529 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 16:15:28,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:15:28,529 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:28,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:28,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1165108211, now seen corresponding path program 2 times [2024-06-04 16:15:28,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:28,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461675766] [2024-06-04 16:15:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:28,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:28,663 INFO 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 16:15:28,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:28,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461675766] [2024-06-04 16:15:28,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461675766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:28,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:28,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:28,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038297395] [2024-06-04 16:15:28,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:28,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:28,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:28,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:28,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:28,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:28,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 222 transitions, 3433 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:28,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:28,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:28,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:29,479 INFO L124 PetriNetUnfolderBase]: 3988/6821 cut-off events. [2024-06-04 16:15:29,479 INFO L125 PetriNetUnfolderBase]: For 248999/249003 co-relation queries the response was YES. [2024-06-04 16:15:29,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44986 conditions, 6821 events. 3988/6821 cut-off events. For 248999/249003 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 48753 event pairs, 1381 based on Foata normal form. 8/6827 useless extension candidates. Maximal degree in co-relation 44909. Up to 5792 conditions per place. [2024-06-04 16:15:29,539 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 135 selfloop transitions, 116 changer transitions 0/257 dead transitions. [2024-06-04 16:15:29,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 257 transitions, 4367 flow [2024-06-04 16:15:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:15:29,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:15:29,540 INFO L175 Difference]: Start difference. First operand has 162 places, 222 transitions, 3433 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:15:29,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 257 transitions, 4367 flow [2024-06-04 16:15:29,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 257 transitions, 4061 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:29,858 INFO L231 Difference]: Finished difference. Result has 164 places, 230 transitions, 3565 flow [2024-06-04 16:15:29,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3565, PETRI_PLACES=164, PETRI_TRANSITIONS=230} [2024-06-04 16:15:29,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-04 16:15:29,859 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 230 transitions, 3565 flow [2024-06-04 16:15:29,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:29,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:29,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:29,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:15:29,860 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 16:15:29,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:29,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1507134193, now seen corresponding path program 6 times [2024-06-04 16:15:29,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:29,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062744401] [2024-06-04 16:15:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:29,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:29,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:29,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062744401] [2024-06-04 16:15:29,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062744401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:29,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:29,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:29,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606831705] [2024-06-04 16:15:29,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:29,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:29,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:30,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:30,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 230 transitions, 3565 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 16:15:30,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:30,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:30,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:31,018 INFO L124 PetriNetUnfolderBase]: 4089/7013 cut-off events. [2024-06-04 16:15:31,018 INFO L125 PetriNetUnfolderBase]: For 280833/280843 co-relation queries the response was YES. [2024-06-04 16:15:31,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44962 conditions, 7013 events. 4089/7013 cut-off events. For 280833/280843 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 50554 event pairs, 1435 based on Foata normal form. 55/7064 useless extension candidates. Maximal degree in co-relation 44883. Up to 5659 conditions per place. [2024-06-04 16:15:31,090 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 162 selfloop transitions, 96 changer transitions 0/264 dead transitions. [2024-06-04 16:15:31,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 264 transitions, 4393 flow [2024-06-04 16:15:31,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:15:31,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:15:31,093 INFO L175 Difference]: Start difference. First operand has 164 places, 230 transitions, 3565 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:15:31,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 264 transitions, 4393 flow [2024-06-04 16:15:31,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 264 transitions, 4248 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:31,511 INFO L231 Difference]: Finished difference. Result has 168 places, 232 transitions, 3703 flow [2024-06-04 16:15:31,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3703, PETRI_PLACES=168, PETRI_TRANSITIONS=232} [2024-06-04 16:15:31,512 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-04 16:15:31,512 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 232 transitions, 3703 flow [2024-06-04 16:15:31,512 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 16:15:31,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:31,512 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 16:15:31,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:15:31,512 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 16:15:31,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:31,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1054372117, now seen corresponding path program 2 times [2024-06-04 16:15:31,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:31,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130510136] [2024-06-04 16:15:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:31,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:31,635 INFO 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 16:15:31,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:31,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130510136] [2024-06-04 16:15:31,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130510136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:31,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:31,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:31,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961597026] [2024-06-04 16:15:31,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:31,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:31,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:31,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:31,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:31,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:31,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 232 transitions, 3703 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 16:15:31,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:31,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:31,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:32,620 INFO L124 PetriNetUnfolderBase]: 4179/7203 cut-off events. [2024-06-04 16:15:32,620 INFO L125 PetriNetUnfolderBase]: For 286567/286577 co-relation queries the response was YES. [2024-06-04 16:15:32,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45543 conditions, 7203 events. 4179/7203 cut-off events. For 286567/286577 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 52607 event pairs, 1404 based on Foata normal form. 47/7246 useless extension candidates. Maximal degree in co-relation 45463. Up to 5474 conditions per place. [2024-06-04 16:15:32,692 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 166 selfloop transitions, 100 changer transitions 0/272 dead transitions. [2024-06-04 16:15:32,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 272 transitions, 4578 flow [2024-06-04 16:15:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 16:15:32,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-04 16:15:32,695 INFO L175 Difference]: Start difference. First operand has 168 places, 232 transitions, 3703 flow. Second operand 8 states and 201 transitions. [2024-06-04 16:15:32,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 272 transitions, 4578 flow [2024-06-04 16:15:33,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 272 transitions, 4329 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:33,090 INFO L231 Difference]: Finished difference. Result has 170 places, 234 transitions, 3744 flow [2024-06-04 16:15:33,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3744, PETRI_PLACES=170, PETRI_TRANSITIONS=234} [2024-06-04 16:15:33,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-04 16:15:33,091 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 234 transitions, 3744 flow [2024-06-04 16:15:33,091 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 16:15:33,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:33,091 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 16:15:33,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:15:33,091 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 16:15:33,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:33,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1773046675, now seen corresponding path program 3 times [2024-06-04 16:15:33,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:33,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117407589] [2024-06-04 16:15:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:33,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:33,237 INFO 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 16:15:33,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:33,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117407589] [2024-06-04 16:15:33,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117407589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:33,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:33,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:33,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667520371] [2024-06-04 16:15:33,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:33,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:33,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:33,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:33,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:33,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:33,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 234 transitions, 3744 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 16:15:33,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:33,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:33,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:34,292 INFO L124 PetriNetUnfolderBase]: 4396/7599 cut-off events. [2024-06-04 16:15:34,293 INFO L125 PetriNetUnfolderBase]: For 310333/310343 co-relation queries the response was YES. [2024-06-04 16:15:34,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47142 conditions, 7599 events. 4396/7599 cut-off events. For 310333/310343 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55754 event pairs, 1420 based on Foata normal form. 47/7642 useless extension candidates. Maximal degree in co-relation 47061. Up to 3271 conditions per place. [2024-06-04 16:15:34,365 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 166 selfloop transitions, 105 changer transitions 0/277 dead transitions. [2024-06-04 16:15:34,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 277 transitions, 4610 flow [2024-06-04 16:15:34,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 16:15:34,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-04 16:15:34,366 INFO L175 Difference]: Start difference. First operand has 170 places, 234 transitions, 3744 flow. Second operand 8 states and 203 transitions. [2024-06-04 16:15:34,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 277 transitions, 4610 flow [2024-06-04 16:15:34,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 277 transitions, 4347 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:34,805 INFO L231 Difference]: Finished difference. Result has 171 places, 234 transitions, 3660 flow [2024-06-04 16:15:34,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3421, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3660, PETRI_PLACES=171, PETRI_TRANSITIONS=234} [2024-06-04 16:15:34,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-04 16:15:34,805 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 234 transitions, 3660 flow [2024-06-04 16:15:34,806 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 16:15:34,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:34,806 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 16:15:34,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:15:34,806 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:34,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:34,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1024611637, now seen corresponding path program 3 times [2024-06-04 16:15:34,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:34,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282885421] [2024-06-04 16:15:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:34,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:34,937 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 16:15:34,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:34,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282885421] [2024-06-04 16:15:34,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282885421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:34,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:34,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:34,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735361441] [2024-06-04 16:15:34,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:34,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:34,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:34,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:34,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:34,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:34,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 234 transitions, 3660 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:34,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:34,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:34,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:35,931 INFO L124 PetriNetUnfolderBase]: 4386/7591 cut-off events. [2024-06-04 16:15:35,931 INFO L125 PetriNetUnfolderBase]: For 286315/286323 co-relation queries the response was YES. [2024-06-04 16:15:35,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46949 conditions, 7591 events. 4386/7591 cut-off events. For 286315/286323 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 56219 event pairs, 1658 based on Foata normal form. 9/7596 useless extension candidates. Maximal degree in co-relation 46867. Up to 6497 conditions per place. [2024-06-04 16:15:36,001 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 143 selfloop transitions, 102 changer transitions 0/251 dead transitions. [2024-06-04 16:15:36,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 251 transitions, 4424 flow [2024-06-04 16:15:36,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:15:36,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-04 16:15:36,002 INFO L175 Difference]: Start difference. First operand has 171 places, 234 transitions, 3660 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:15:36,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 251 transitions, 4424 flow [2024-06-04 16:15:36,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 251 transitions, 4137 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:36,414 INFO L231 Difference]: Finished difference. Result has 172 places, 234 transitions, 3588 flow [2024-06-04 16:15:36,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3588, PETRI_PLACES=172, PETRI_TRANSITIONS=234} [2024-06-04 16:15:36,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-04 16:15:36,415 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 234 transitions, 3588 flow [2024-06-04 16:15:36,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:36,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:36,415 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 16:15:36,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:15:36,416 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:36,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:36,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1921944601, now seen corresponding path program 1 times [2024-06-04 16:15:36,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:36,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140173785] [2024-06-04 16:15:36,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:36,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:36,562 INFO 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 16:15:36,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:36,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140173785] [2024-06-04 16:15:36,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140173785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:36,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:36,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:36,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277456922] [2024-06-04 16:15:36,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:36,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:36,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:36,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:36,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:36,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:36,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 234 transitions, 3588 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:36,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:36,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:36,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:37,596 INFO L124 PetriNetUnfolderBase]: 4374/7544 cut-off events. [2024-06-04 16:15:37,596 INFO L125 PetriNetUnfolderBase]: For 281862/281868 co-relation queries the response was YES. [2024-06-04 16:15:37,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46941 conditions, 7544 events. 4374/7544 cut-off events. For 281862/281868 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55474 event pairs, 1656 based on Foata normal form. 7/7546 useless extension candidates. Maximal degree in co-relation 46858. Up to 6749 conditions per place. [2024-06-04 16:15:37,671 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 62 changer transitions 0/286 dead transitions. [2024-06-04 16:15:37,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 286 transitions, 4963 flow [2024-06-04 16:15:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:37,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:15:37,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:15:37,673 INFO L175 Difference]: Start difference. First operand has 172 places, 234 transitions, 3588 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:15:37,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 286 transitions, 4963 flow [2024-06-04 16:15:38,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 286 transitions, 4373 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-04 16:15:38,111 INFO L231 Difference]: Finished difference. Result has 171 places, 261 transitions, 3777 flow [2024-06-04 16:15:38,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3086, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3777, PETRI_PLACES=171, PETRI_TRANSITIONS=261} [2024-06-04 16:15:38,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-04 16:15:38,111 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 261 transitions, 3777 flow [2024-06-04 16:15:38,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:38,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:38,112 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 16:15:38,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:15:38,112 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:38,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1206993643, now seen corresponding path program 2 times [2024-06-04 16:15:38,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:38,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772009330] [2024-06-04 16:15:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:38,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:38,271 INFO 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 16:15:38,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:38,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772009330] [2024-06-04 16:15:38,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772009330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:38,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:38,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:38,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006086561] [2024-06-04 16:15:38,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:38,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:38,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:38,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:38,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:38,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:38,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 261 transitions, 3777 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:38,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:38,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:38,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:39,216 INFO L124 PetriNetUnfolderBase]: 4393/7582 cut-off events. [2024-06-04 16:15:39,217 INFO L125 PetriNetUnfolderBase]: For 285447/285455 co-relation queries the response was YES. [2024-06-04 16:15:39,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47041 conditions, 7582 events. 4393/7582 cut-off events. For 285447/285455 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55784 event pairs, 1655 based on Foata normal form. 6/7584 useless extension candidates. Maximal degree in co-relation 46956. Up to 6367 conditions per place. [2024-06-04 16:15:39,298 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 150 selfloop transitions, 127 changer transitions 0/283 dead transitions. [2024-06-04 16:15:39,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 283 transitions, 4705 flow [2024-06-04 16:15:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:15:39,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-04 16:15:39,299 INFO L175 Difference]: Start difference. First operand has 171 places, 261 transitions, 3777 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:15:39,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 283 transitions, 4705 flow [2024-06-04 16:15:39,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 283 transitions, 4624 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:39,889 INFO L231 Difference]: Finished difference. Result has 175 places, 266 transitions, 4051 flow [2024-06-04 16:15:39,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4051, PETRI_PLACES=175, PETRI_TRANSITIONS=266} [2024-06-04 16:15:39,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-04 16:15:39,890 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 266 transitions, 4051 flow [2024-06-04 16:15:39,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:39,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:39,890 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 16:15:39,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:15:39,891 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 16:15:39,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:39,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1519793285, now seen corresponding path program 3 times [2024-06-04 16:15:39,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:39,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276652155] [2024-06-04 16:15:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:39,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:40,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:40,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276652155] [2024-06-04 16:15:40,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276652155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:40,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:40,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:40,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183317775] [2024-06-04 16:15:40,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:40,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:40,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:40,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:40,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:40,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 266 transitions, 4051 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:40,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:40,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:40,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:40,994 INFO L124 PetriNetUnfolderBase]: 4386/7572 cut-off events. [2024-06-04 16:15:40,994 INFO L125 PetriNetUnfolderBase]: For 297476/297484 co-relation queries the response was YES. [2024-06-04 16:15:41,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47483 conditions, 7572 events. 4386/7572 cut-off events. For 297476/297484 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55707 event pairs, 1662 based on Foata normal form. 6/7574 useless extension candidates. Maximal degree in co-relation 47397. Up to 6365 conditions per place. [2024-06-04 16:15:41,071 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 144 selfloop transitions, 133 changer transitions 0/283 dead transitions. [2024-06-04 16:15:41,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 283 transitions, 4897 flow [2024-06-04 16:15:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:15:41,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:15:41,072 INFO L175 Difference]: Start difference. First operand has 175 places, 266 transitions, 4051 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:15:41,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 283 transitions, 4897 flow [2024-06-04 16:15:41,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 283 transitions, 4615 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:41,504 INFO L231 Difference]: Finished difference. Result has 177 places, 266 transitions, 4044 flow [2024-06-04 16:15:41,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4044, PETRI_PLACES=177, PETRI_TRANSITIONS=266} [2024-06-04 16:15:41,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-04 16:15:41,505 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 266 transitions, 4044 flow [2024-06-04 16:15:41,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:41,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:41,505 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 16:15:41,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:15:41,505 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 16:15:41,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1519802213, now seen corresponding path program 1 times [2024-06-04 16:15:41,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:41,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496319581] [2024-06-04 16:15:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:41,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:41,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496319581] [2024-06-04 16:15:41,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496319581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:41,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:41,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:41,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947534817] [2024-06-04 16:15:41,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:41,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:41,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:41,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:41,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 266 transitions, 4044 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:41,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:41,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:41,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:42,615 INFO L124 PetriNetUnfolderBase]: 4389/7573 cut-off events. [2024-06-04 16:15:42,615 INFO L125 PetriNetUnfolderBase]: For 310562/310570 co-relation queries the response was YES. [2024-06-04 16:15:42,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47641 conditions, 7573 events. 4389/7573 cut-off events. For 310562/310570 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55713 event pairs, 1666 based on Foata normal form. 10/7580 useless extension candidates. Maximal degree in co-relation 47555. Up to 6997 conditions per place. [2024-06-04 16:15:42,695 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 252 selfloop transitions, 22 changer transitions 0/280 dead transitions. [2024-06-04 16:15:42,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 280 transitions, 4674 flow [2024-06-04 16:15:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-04 16:15:42,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-04 16:15:42,696 INFO L175 Difference]: Start difference. First operand has 177 places, 266 transitions, 4044 flow. Second operand 6 states and 130 transitions. [2024-06-04 16:15:42,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 280 transitions, 4674 flow [2024-06-04 16:15:43,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 280 transitions, 4266 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:43,163 INFO L231 Difference]: Finished difference. Result has 176 places, 269 transitions, 3748 flow [2024-06-04 16:15:43,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3636, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3748, PETRI_PLACES=176, PETRI_TRANSITIONS=269} [2024-06-04 16:15:43,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-04 16:15:43,164 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 269 transitions, 3748 flow [2024-06-04 16:15:43,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:43,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:43,165 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 16:15:43,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:15:43,165 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 16:15:43,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:43,165 INFO L85 PathProgramCache]: Analyzing trace with hash 894977349, now seen corresponding path program 1 times [2024-06-04 16:15:43,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:43,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50521219] [2024-06-04 16:15:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:43,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:43,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:43,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50521219] [2024-06-04 16:15:43,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50521219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:43,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:43,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:43,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242522498] [2024-06-04 16:15:43,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:43,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:43,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:43,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:43,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:43,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:43,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 269 transitions, 3748 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 16:15:43,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:43,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:43,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:44,337 INFO L124 PetriNetUnfolderBase]: 4404/7610 cut-off events. [2024-06-04 16:15:44,338 INFO L125 PetriNetUnfolderBase]: For 318954/318964 co-relation queries the response was YES. [2024-06-04 16:15:44,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47339 conditions, 7610 events. 4404/7610 cut-off events. For 318954/318964 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 56099 event pairs, 1554 based on Foata normal form. 11/7618 useless extension candidates. Maximal degree in co-relation 47254. Up to 6384 conditions per place. [2024-06-04 16:15:44,405 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 127 changer transitions 0/300 dead transitions. [2024-06-04 16:15:44,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 300 transitions, 4652 flow [2024-06-04 16:15:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:15:44,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-04 16:15:44,407 INFO L175 Difference]: Start difference. First operand has 176 places, 269 transitions, 3748 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:15:44,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 300 transitions, 4652 flow [2024-06-04 16:15:44,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 300 transitions, 4562 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:44,837 INFO L231 Difference]: Finished difference. Result has 180 places, 274 transitions, 3999 flow [2024-06-04 16:15:44,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3999, PETRI_PLACES=180, PETRI_TRANSITIONS=274} [2024-06-04 16:15:44,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-04 16:15:44,838 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 274 transitions, 3999 flow [2024-06-04 16:15:44,839 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 16:15:44,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:44,839 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 16:15:44,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:15:44,839 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 16:15:44,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:44,840 INFO L85 PathProgramCache]: Analyzing trace with hash 742178874, now seen corresponding path program 1 times [2024-06-04 16:15:44,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:44,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852134876] [2024-06-04 16:15:44,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:44,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:45,039 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 16:15:45,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:45,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852134876] [2024-06-04 16:15:45,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852134876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:45,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:45,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:45,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66098420] [2024-06-04 16:15:45,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:45,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:45,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:45,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:45,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 274 transitions, 3999 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 16:15:45,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:45,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:45,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:46,037 INFO L124 PetriNetUnfolderBase]: 4384/7566 cut-off events. [2024-06-04 16:15:46,037 INFO L125 PetriNetUnfolderBase]: For 330473/330475 co-relation queries the response was YES. [2024-06-04 16:15:46,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47659 conditions, 7566 events. 4384/7566 cut-off events. For 330473/330475 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55591 event pairs, 1647 based on Foata normal form. 6/7570 useless extension candidates. Maximal degree in co-relation 47573. Up to 6921 conditions per place. [2024-06-04 16:15:46,117 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 264 selfloop transitions, 28 changer transitions 0/298 dead transitions. [2024-06-04 16:15:46,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 298 transitions, 4651 flow [2024-06-04 16:15:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-04 16:15:46,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-04 16:15:46,121 INFO L175 Difference]: Start difference. First operand has 180 places, 274 transitions, 3999 flow. Second operand 7 states and 162 transitions. [2024-06-04 16:15:46,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 298 transitions, 4651 flow [2024-06-04 16:15:46,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 298 transitions, 4361 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:46,747 INFO L231 Difference]: Finished difference. Result has 181 places, 275 transitions, 3793 flow [2024-06-04 16:15:46,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3709, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3793, PETRI_PLACES=181, PETRI_TRANSITIONS=275} [2024-06-04 16:15:46,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-04 16:15:46,748 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 275 transitions, 3793 flow [2024-06-04 16:15:46,748 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 16:15:46,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:46,749 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 16:15:46,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:15:46,749 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 16:15:46,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:46,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2013671024, now seen corresponding path program 2 times [2024-06-04 16:15:46,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:46,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80812962] [2024-06-04 16:15:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:46,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:46,881 INFO 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 16:15:46,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:46,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80812962] [2024-06-04 16:15:46,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80812962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:46,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:46,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:46,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6714250] [2024-06-04 16:15:46,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:46,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:46,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:46,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:46,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:46,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:46,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 275 transitions, 3793 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:46,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:46,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:46,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:47,863 INFO L124 PetriNetUnfolderBase]: 4374/7546 cut-off events. [2024-06-04 16:15:47,863 INFO L125 PetriNetUnfolderBase]: For 336557/336559 co-relation queries the response was YES. [2024-06-04 16:15:47,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47205 conditions, 7546 events. 4374/7546 cut-off events. For 336557/336559 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55452 event pairs, 1557 based on Foata normal form. 4/7548 useless extension candidates. Maximal degree in co-relation 47118. Up to 6368 conditions per place. [2024-06-04 16:15:47,941 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 155 selfloop transitions, 141 changer transitions 0/302 dead transitions. [2024-06-04 16:15:47,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 302 transitions, 4727 flow [2024-06-04 16:15:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:15:47,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:15:47,942 INFO L175 Difference]: Start difference. First operand has 181 places, 275 transitions, 3793 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:15:47,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 302 transitions, 4727 flow [2024-06-04 16:15:48,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 302 transitions, 4677 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:48,582 INFO L231 Difference]: Finished difference. Result has 185 places, 275 transitions, 4034 flow [2024-06-04 16:15:48,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3743, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4034, PETRI_PLACES=185, PETRI_TRANSITIONS=275} [2024-06-04 16:15:48,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-04 16:15:48,583 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 275 transitions, 4034 flow [2024-06-04 16:15:48,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:48,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:48,583 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 16:15:48,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:15:48,584 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 16:15:48,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1758629047, now seen corresponding path program 2 times [2024-06-04 16:15:48,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:48,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656780588] [2024-06-04 16:15:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:48,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:48,711 INFO 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 16:15:48,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:48,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656780588] [2024-06-04 16:15:48,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656780588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:48,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:48,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955850608] [2024-06-04 16:15:48,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:48,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:48,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 275 transitions, 4034 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 16:15:48,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:48,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:48,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:49,826 INFO L124 PetriNetUnfolderBase]: 4393/7581 cut-off events. [2024-06-04 16:15:49,826 INFO L125 PetriNetUnfolderBase]: For 354167/354175 co-relation queries the response was YES. [2024-06-04 16:15:49,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48325 conditions, 7581 events. 4393/7581 cut-off events. For 354167/354175 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55770 event pairs, 1587 based on Foata normal form. 6/7583 useless extension candidates. Maximal degree in co-relation 48237. Up to 6387 conditions per place. [2024-06-04 16:15:49,910 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 148 selfloop transitions, 143 changer transitions 0/297 dead transitions. [2024-06-04 16:15:49,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 297 transitions, 5020 flow [2024-06-04 16:15:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:15:49,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:15:49,911 INFO L175 Difference]: Start difference. First operand has 185 places, 275 transitions, 4034 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:15:49,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 297 transitions, 5020 flow [2024-06-04 16:15:50,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 297 transitions, 4763 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:50,454 INFO L231 Difference]: Finished difference. Result has 186 places, 280 transitions, 4158 flow [2024-06-04 16:15:50,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3783, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4158, PETRI_PLACES=186, PETRI_TRANSITIONS=280} [2024-06-04 16:15:50,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-04 16:15:50,458 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 280 transitions, 4158 flow [2024-06-04 16:15:50,458 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 16:15:50,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:50,459 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 16:15:50,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:15:50,459 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 16:15:50,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:50,459 INFO L85 PathProgramCache]: Analyzing trace with hash 895294479, now seen corresponding path program 3 times [2024-06-04 16:15:50,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:50,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990783371] [2024-06-04 16:15:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:50,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:50,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:50,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990783371] [2024-06-04 16:15:50,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990783371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:50,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:50,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:50,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349995285] [2024-06-04 16:15:50,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:50,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:50,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:50,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:50,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:50,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:50,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 280 transitions, 4158 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 16:15:50,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:50,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:50,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:51,720 INFO L124 PetriNetUnfolderBase]: 4386/7574 cut-off events. [2024-06-04 16:15:51,721 INFO L125 PetriNetUnfolderBase]: For 364533/364541 co-relation queries the response was YES. [2024-06-04 16:15:51,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48450 conditions, 7574 events. 4386/7574 cut-off events. For 364533/364541 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55744 event pairs, 1587 based on Foata normal form. 6/7576 useless extension candidates. Maximal degree in co-relation 48361. Up to 6383 conditions per place. [2024-06-04 16:15:51,791 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 154 selfloop transitions, 136 changer transitions 0/296 dead transitions. [2024-06-04 16:15:51,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 296 transitions, 4968 flow [2024-06-04 16:15:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:15:51,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:15:51,793 INFO L175 Difference]: Start difference. First operand has 186 places, 280 transitions, 4158 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:15:51,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 296 transitions, 4968 flow [2024-06-04 16:15:52,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 296 transitions, 4710 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:52,359 INFO L231 Difference]: Finished difference. Result has 189 places, 280 transitions, 4182 flow [2024-06-04 16:15:52,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3900, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4182, PETRI_PLACES=189, PETRI_TRANSITIONS=280} [2024-06-04 16:15:52,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-04 16:15:52,360 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 280 transitions, 4182 flow [2024-06-04 16:15:52,360 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 16:15:52,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:52,360 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 16:15:52,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:15:52,360 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 16:15:52,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash -866355156, now seen corresponding path program 3 times [2024-06-04 16:15:52,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:52,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989260252] [2024-06-04 16:15:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:52,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:52,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:52,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989260252] [2024-06-04 16:15:52,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989260252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:52,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:52,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:52,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046808312] [2024-06-04 16:15:52,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:52,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:52,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:52,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:52,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:52,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:52,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 280 transitions, 4182 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:52,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:52,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:52,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:53,456 INFO L124 PetriNetUnfolderBase]: 4365/7537 cut-off events. [2024-06-04 16:15:53,456 INFO L125 PetriNetUnfolderBase]: For 374397/374403 co-relation queries the response was YES. [2024-06-04 16:15:53,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48347 conditions, 7537 events. 4365/7537 cut-off events. For 374397/374403 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55388 event pairs, 1584 based on Foata normal form. 4/7536 useless extension candidates. Maximal degree in co-relation 48257. Up to 6760 conditions per place. [2024-06-04 16:15:53,535 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 61 changer transitions 0/311 dead transitions. [2024-06-04 16:15:53,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 311 transitions, 5114 flow [2024-06-04 16:15:53,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:15:53,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 16:15:53,536 INFO L175 Difference]: Start difference. First operand has 189 places, 280 transitions, 4182 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:15:53,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 311 transitions, 5114 flow [2024-06-04 16:15:54,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 311 transitions, 4618 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-04 16:15:54,163 INFO L231 Difference]: Finished difference. Result has 190 places, 284 transitions, 3936 flow [2024-06-04 16:15:54,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3686, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3936, PETRI_PLACES=190, PETRI_TRANSITIONS=284} [2024-06-04 16:15:54,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-04 16:15:54,164 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 284 transitions, 3936 flow [2024-06-04 16:15:54,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:54,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:54,164 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 16:15:54,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:15:54,165 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 16:15:54,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:54,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1334522038, now seen corresponding path program 4 times [2024-06-04 16:15:54,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:54,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040710243] [2024-06-04 16:15:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:54,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:54,286 INFO 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 16:15:54,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:54,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040710243] [2024-06-04 16:15:54,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040710243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:54,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:54,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:54,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772062663] [2024-06-04 16:15:54,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:54,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:54,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:54,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:54,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:54,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 284 transitions, 3936 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:54,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:54,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:54,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:55,242 INFO L124 PetriNetUnfolderBase]: 4337/7475 cut-off events. [2024-06-04 16:15:55,243 INFO L125 PetriNetUnfolderBase]: For 380770/380776 co-relation queries the response was YES. [2024-06-04 16:15:55,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47519 conditions, 7475 events. 4337/7475 cut-off events. For 380770/380776 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 54666 event pairs, 1637 based on Foata normal form. 5/7475 useless extension candidates. Maximal degree in co-relation 47427. Up to 6350 conditions per place. [2024-06-04 16:15:55,313 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 137 changer transitions 1/307 dead transitions. [2024-06-04 16:15:55,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 307 transitions, 4794 flow [2024-06-04 16:15:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:15:55,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:15:55,314 INFO L175 Difference]: Start difference. First operand has 190 places, 284 transitions, 3936 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:15:55,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 307 transitions, 4794 flow [2024-06-04 16:15:56,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 307 transitions, 4652 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:56,099 INFO L231 Difference]: Finished difference. Result has 192 places, 283 transitions, 4056 flow [2024-06-04 16:15:56,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3794, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4056, PETRI_PLACES=192, PETRI_TRANSITIONS=283} [2024-06-04 16:15:56,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-04 16:15:56,100 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 283 transitions, 4056 flow [2024-06-04 16:15:56,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:56,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:56,100 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 16:15:56,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:15:56,101 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 16:15:56,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:56,101 INFO L85 PathProgramCache]: Analyzing trace with hash -138412214, now seen corresponding path program 5 times [2024-06-04 16:15:56,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:56,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220807345] [2024-06-04 16:15:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:56,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:56,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:56,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220807345] [2024-06-04 16:15:56,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220807345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:56,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:56,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:56,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447576199] [2024-06-04 16:15:56,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:56,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:56,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:56,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:56,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 283 transitions, 4056 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:56,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:56,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:56,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:57,150 INFO L124 PetriNetUnfolderBase]: 4312/7439 cut-off events. [2024-06-04 16:15:57,151 INFO L125 PetriNetUnfolderBase]: For 391652/391660 co-relation queries the response was YES. [2024-06-04 16:15:57,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47811 conditions, 7439 events. 4312/7439 cut-off events. For 391652/391660 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 54499 event pairs, 1651 based on Foata normal form. 5/7440 useless extension candidates. Maximal degree in co-relation 47718. Up to 6321 conditions per place. [2024-06-04 16:15:57,221 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 158 selfloop transitions, 134 changer transitions 1/299 dead transitions. [2024-06-04 16:15:57,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 299 transitions, 4884 flow [2024-06-04 16:15:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:15:57,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-04 16:15:57,222 INFO L175 Difference]: Start difference. First operand has 192 places, 283 transitions, 4056 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:15:57,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 299 transitions, 4884 flow [2024-06-04 16:15:57,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 299 transitions, 4584 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:57,874 INFO L231 Difference]: Finished difference. Result has 192 places, 282 transitions, 4014 flow [2024-06-04 16:15:57,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3756, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4014, PETRI_PLACES=192, PETRI_TRANSITIONS=282} [2024-06-04 16:15:57,874 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-04 16:15:57,874 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 282 transitions, 4014 flow [2024-06-04 16:15:57,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:57,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:57,875 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 16:15:57,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:15:57,875 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 16:15:57,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash 563708312, now seen corresponding path program 6 times [2024-06-04 16:15:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:57,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738771764] [2024-06-04 16:15:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:57,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:57,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:57,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738771764] [2024-06-04 16:15:57,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738771764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:57,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:57,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:57,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638887213] [2024-06-04 16:15:57,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:57,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:57,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:57,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:58,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:58,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:58,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 282 transitions, 4014 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:58,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:58,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:58,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:58,918 INFO L124 PetriNetUnfolderBase]: 4115/7059 cut-off events. [2024-06-04 16:15:58,918 INFO L125 PetriNetUnfolderBase]: For 401149/401157 co-relation queries the response was YES. [2024-06-04 16:15:58,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46031 conditions, 7059 events. 4115/7059 cut-off events. For 401149/401157 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 50719 event pairs, 1569 based on Foata normal form. 7/7062 useless extension candidates. Maximal degree in co-relation 45937. Up to 5986 conditions per place. [2024-06-04 16:15:58,985 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 161 selfloop transitions, 127 changer transitions 3/297 dead transitions. [2024-06-04 16:15:58,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 297 transitions, 4736 flow [2024-06-04 16:15:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:15:58,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:15:58,986 INFO L175 Difference]: Start difference. First operand has 192 places, 282 transitions, 4014 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:15:58,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 297 transitions, 4736 flow [2024-06-04 16:15:59,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 297 transitions, 4453 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:59,638 INFO L231 Difference]: Finished difference. Result has 194 places, 279 transitions, 3941 flow [2024-06-04 16:15:59,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3731, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3941, PETRI_PLACES=194, PETRI_TRANSITIONS=279} [2024-06-04 16:15:59,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-04 16:15:59,638 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 279 transitions, 3941 flow [2024-06-04 16:15:59,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:59,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:59,656 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 16:15:59,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:15:59,656 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 16:15:59,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:59,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1685194395, now seen corresponding path program 1 times [2024-06-04 16:15:59,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:59,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028955735] [2024-06-04 16:15:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:59,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:59,788 INFO 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 16:15:59,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:59,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028955735] [2024-06-04 16:15:59,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028955735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:59,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:59,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:59,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757021552] [2024-06-04 16:15:59,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:59,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:59,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:59,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:59,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:15:59,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 279 transitions, 3941 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 16:15:59,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:59,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:15:59,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:00,724 INFO L124 PetriNetUnfolderBase]: 4070/6991 cut-off events. [2024-06-04 16:16:00,724 INFO L125 PetriNetUnfolderBase]: For 413806/413812 co-relation queries the response was YES. [2024-06-04 16:16:00,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46107 conditions, 6991 events. 4070/6991 cut-off events. For 413806/413812 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 49975 event pairs, 1548 based on Foata normal form. 4/6990 useless extension candidates. Maximal degree in co-relation 46012. Up to 6258 conditions per place. [2024-06-04 16:16:00,799 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 64 changer transitions 1/303 dead transitions. [2024-06-04 16:16:00,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 303 transitions, 4793 flow [2024-06-04 16:16:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:16:00,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:16:00,801 INFO L175 Difference]: Start difference. First operand has 194 places, 279 transitions, 3941 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:16:00,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 303 transitions, 4793 flow [2024-06-04 16:16:01,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 303 transitions, 4432 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-04 16:16:01,519 INFO L231 Difference]: Finished difference. Result has 193 places, 284 transitions, 3842 flow [2024-06-04 16:16:01,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3842, PETRI_PLACES=193, PETRI_TRANSITIONS=284} [2024-06-04 16:16:01,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-04 16:16:01,519 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 284 transitions, 3842 flow [2024-06-04 16:16:01,519 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 16:16:01,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:01,520 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 16:16:01,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:16:01,520 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 16:16:01,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1334508367, now seen corresponding path program 2 times [2024-06-04 16:16:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:01,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771525501] [2024-06-04 16:16:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:01,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:01,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:01,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771525501] [2024-06-04 16:16:01,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771525501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:01,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:01,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:01,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675579871] [2024-06-04 16:16:01,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:01,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:01,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:01,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:01,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:01,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 284 transitions, 3842 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 16:16:01,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:01,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:01,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:02,605 INFO L124 PetriNetUnfolderBase]: 4096/7040 cut-off events. [2024-06-04 16:16:02,605 INFO L125 PetriNetUnfolderBase]: For 431920/431926 co-relation queries the response was YES. [2024-06-04 16:16:02,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46500 conditions, 7040 events. 4096/7040 cut-off events. For 431920/431926 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 50450 event pairs, 1550 based on Foata normal form. 7/7042 useless extension candidates. Maximal degree in co-relation 46403. Up to 5938 conditions per place. [2024-06-04 16:16:02,680 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 153 selfloop transitions, 156 changer transitions 3/318 dead transitions. [2024-06-04 16:16:02,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 318 transitions, 5022 flow [2024-06-04 16:16:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:16:02,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:16:02,681 INFO L175 Difference]: Start difference. First operand has 193 places, 284 transitions, 3842 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:16:02,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 318 transitions, 5022 flow [2024-06-04 16:16:03,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 318 transitions, 4892 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:03,479 INFO L231 Difference]: Finished difference. Result has 197 places, 291 transitions, 4196 flow [2024-06-04 16:16:03,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3712, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4196, PETRI_PLACES=197, PETRI_TRANSITIONS=291} [2024-06-04 16:16:03,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-04 16:16:03,480 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 291 transitions, 4196 flow [2024-06-04 16:16:03,480 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 16:16:03,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:03,481 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 16:16:03,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:16:03,481 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 16:16:03,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:03,481 INFO L85 PathProgramCache]: Analyzing trace with hash 569430323, now seen corresponding path program 3 times [2024-06-04 16:16:03,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:03,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918843775] [2024-06-04 16:16:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:03,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:03,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:03,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918843775] [2024-06-04 16:16:03,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918843775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:03,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:03,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:03,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425698023] [2024-06-04 16:16:03,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:03,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:03,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:03,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:03,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:03,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:03,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 291 transitions, 4196 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 16:16:03,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:03,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:03,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:04,569 INFO L124 PetriNetUnfolderBase]: 4078/7017 cut-off events. [2024-06-04 16:16:04,569 INFO L125 PetriNetUnfolderBase]: For 439012/439018 co-relation queries the response was YES. [2024-06-04 16:16:04,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46893 conditions, 7017 events. 4078/7017 cut-off events. For 439012/439018 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 50385 event pairs, 1550 based on Foata normal form. 4/7016 useless extension candidates. Maximal degree in co-relation 46794. Up to 5927 conditions per place. [2024-06-04 16:16:04,635 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 150 selfloop transitions, 157 changer transitions 1/314 dead transitions. [2024-06-04 16:16:04,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 314 transitions, 5088 flow [2024-06-04 16:16:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:04,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:16:04,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-04 16:16:04,636 INFO L175 Difference]: Start difference. First operand has 197 places, 291 transitions, 4196 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:16:04,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 314 transitions, 5088 flow [2024-06-04 16:16:05,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 314 transitions, 4882 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:05,459 INFO L231 Difference]: Finished difference. Result has 201 places, 290 transitions, 4307 flow [2024-06-04 16:16:05,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4307, PETRI_PLACES=201, PETRI_TRANSITIONS=290} [2024-06-04 16:16:05,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-04 16:16:05,460 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 290 transitions, 4307 flow [2024-06-04 16:16:05,460 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 16:16:05,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:05,460 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 16:16:05,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:16:05,460 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 16:16:05,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:05,461 INFO L85 PathProgramCache]: Analyzing trace with hash -131046893, now seen corresponding path program 4 times [2024-06-04 16:16:05,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:05,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699914673] [2024-06-04 16:16:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:05,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:05,579 INFO 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 16:16:05,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:05,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699914673] [2024-06-04 16:16:05,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699914673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:05,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:05,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:05,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16932603] [2024-06-04 16:16:05,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:05,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:05,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:05,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:05,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:05,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:05,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 290 transitions, 4307 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 16:16:05,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:05,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:05,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:06,499 INFO L124 PetriNetUnfolderBase]: 4006/6883 cut-off events. [2024-06-04 16:16:06,499 INFO L125 PetriNetUnfolderBase]: For 450455/450463 co-relation queries the response was YES. [2024-06-04 16:16:06,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46547 conditions, 6883 events. 4006/6883 cut-off events. For 450455/450463 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 49077 event pairs, 1522 based on Foata normal form. 6/6885 useless extension candidates. Maximal degree in co-relation 46447. Up to 5800 conditions per place. [2024-06-04 16:16:06,569 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 159 selfloop transitions, 137 changer transitions 3/305 dead transitions. [2024-06-04 16:16:06,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 305 transitions, 5053 flow [2024-06-04 16:16:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:16:06,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-04 16:16:06,571 INFO L175 Difference]: Start difference. First operand has 201 places, 290 transitions, 4307 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:16:06,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 305 transitions, 5053 flow [2024-06-04 16:16:07,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 305 transitions, 4763 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:07,574 INFO L231 Difference]: Finished difference. Result has 201 places, 287 transitions, 4246 flow [2024-06-04 16:16:07,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4019, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4246, PETRI_PLACES=201, PETRI_TRANSITIONS=287} [2024-06-04 16:16:07,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-04 16:16:07,575 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 287 transitions, 4246 flow [2024-06-04 16:16:07,575 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 16:16:07,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:07,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:07,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:16:07,576 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 16:16:07,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:07,576 INFO L85 PathProgramCache]: Analyzing trace with hash -818748930, now seen corresponding path program 1 times [2024-06-04 16:16:07,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:07,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024168633] [2024-06-04 16:16:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:07,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:07,739 INFO 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 16:16:07,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:07,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024168633] [2024-06-04 16:16:07,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024168633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:07,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:07,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:07,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449778071] [2024-06-04 16:16:07,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:07,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:07,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:07,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:07,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 287 transitions, 4246 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 16:16:07,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:07,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:07,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:08,752 INFO L124 PetriNetUnfolderBase]: 4003/6858 cut-off events. [2024-06-04 16:16:08,752 INFO L125 PetriNetUnfolderBase]: For 488619/488621 co-relation queries the response was YES. [2024-06-04 16:16:08,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48205 conditions, 6858 events. 4003/6858 cut-off events. For 488619/488621 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48548 event pairs, 1339 based on Foata normal form. 14/6870 useless extension candidates. Maximal degree in co-relation 48105. Up to 5839 conditions per place. [2024-06-04 16:16:08,820 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 297 selfloop transitions, 37 changer transitions 0/340 dead transitions. [2024-06-04 16:16:08,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 340 transitions, 5397 flow [2024-06-04 16:16:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:16:08,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:16:08,821 INFO L175 Difference]: Start difference. First operand has 201 places, 287 transitions, 4246 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:16:08,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 340 transitions, 5397 flow [2024-06-04 16:16:09,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 340 transitions, 4701 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-04 16:16:09,809 INFO L231 Difference]: Finished difference. Result has 200 places, 300 transitions, 3918 flow [2024-06-04 16:16:09,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3918, PETRI_PLACES=200, PETRI_TRANSITIONS=300} [2024-06-04 16:16:09,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-04 16:16:09,810 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 300 transitions, 3918 flow [2024-06-04 16:16:09,810 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 16:16:09,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:09,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:09,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:16:09,810 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 16:16:09,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:09,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1713698762, now seen corresponding path program 2 times [2024-06-04 16:16:09,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:09,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931079590] [2024-06-04 16:16:09,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:09,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:09,950 INFO 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 16:16:09,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:09,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931079590] [2024-06-04 16:16:09,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931079590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:09,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:09,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:09,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022926855] [2024-06-04 16:16:09,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:09,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:09,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:09,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:09,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:09,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:09,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 300 transitions, 3918 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 16:16:09,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:09,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:09,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:10,946 INFO L124 PetriNetUnfolderBase]: 3996/6847 cut-off events. [2024-06-04 16:16:10,946 INFO L125 PetriNetUnfolderBase]: For 494786/494788 co-relation queries the response was YES. [2024-06-04 16:16:11,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47180 conditions, 6847 events. 3996/6847 cut-off events. For 494786/494788 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48462 event pairs, 1436 based on Foata normal form. 22/6867 useless extension candidates. Maximal degree in co-relation 47079. Up to 5686 conditions per place. [2024-06-04 16:16:11,023 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 168 selfloop transitions, 168 changer transitions 0/342 dead transitions. [2024-06-04 16:16:11,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 342 transitions, 4862 flow [2024-06-04 16:16:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-04 16:16:11,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:16:11,025 INFO L175 Difference]: Start difference. First operand has 200 places, 300 transitions, 3918 flow. Second operand 10 states and 240 transitions. [2024-06-04 16:16:11,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 342 transitions, 4862 flow [2024-06-04 16:16:11,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 342 transitions, 4781 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-04 16:16:11,961 INFO L231 Difference]: Finished difference. Result has 207 places, 302 transitions, 4237 flow [2024-06-04 16:16:11,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4237, PETRI_PLACES=207, PETRI_TRANSITIONS=302} [2024-06-04 16:16:11,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-04 16:16:11,962 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 302 transitions, 4237 flow [2024-06-04 16:16:11,962 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 16:16:11,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:11,962 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 16:16:11,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:16:11,963 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 16:16:11,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:11,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1317429518, now seen corresponding path program 3 times [2024-06-04 16:16:11,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:11,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701426889] [2024-06-04 16:16:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:11,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:12,101 INFO 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 16:16:12,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:12,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701426889] [2024-06-04 16:16:12,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701426889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:12,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:12,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:12,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481991031] [2024-06-04 16:16:12,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:12,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:12,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:12,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:12,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:12,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:12,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 302 transitions, 4237 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 16:16:12,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:12,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:12,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:13,130 INFO L124 PetriNetUnfolderBase]: 4040/6913 cut-off events. [2024-06-04 16:16:13,130 INFO L125 PetriNetUnfolderBase]: For 500271/500273 co-relation queries the response was YES. [2024-06-04 16:16:13,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48419 conditions, 6913 events. 4040/6913 cut-off events. For 500271/500273 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 49038 event pairs, 1438 based on Foata normal form. 14/6923 useless extension candidates. Maximal degree in co-relation 48316. Up to 5786 conditions per place. [2024-06-04 16:16:13,201 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 157 changer transitions 0/335 dead transitions. [2024-06-04 16:16:13,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 335 transitions, 5166 flow [2024-06-04 16:16:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-04 16:16:13,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-04 16:16:13,202 INFO L175 Difference]: Start difference. First operand has 207 places, 302 transitions, 4237 flow. Second operand 9 states and 212 transitions. [2024-06-04 16:16:13,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 335 transitions, 5166 flow [2024-06-04 16:16:14,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 335 transitions, 4810 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:14,224 INFO L231 Difference]: Finished difference. Result has 208 places, 305 transitions, 4281 flow [2024-06-04 16:16:14,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4281, PETRI_PLACES=208, PETRI_TRANSITIONS=305} [2024-06-04 16:16:14,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-04 16:16:14,224 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 305 transitions, 4281 flow [2024-06-04 16:16:14,225 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 16:16:14,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:14,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:14,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:16:14,225 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 16:16:14,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:14,225 INFO L85 PathProgramCache]: Analyzing trace with hash 294966884, now seen corresponding path program 4 times [2024-06-04 16:16:14,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:14,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769652620] [2024-06-04 16:16:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:14,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:14,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:14,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769652620] [2024-06-04 16:16:14,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769652620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:14,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:14,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:14,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219943953] [2024-06-04 16:16:14,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:14,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:14,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:14,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:14,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:14,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:14,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 305 transitions, 4281 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 16:16:14,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:14,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:14,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:15,311 INFO L124 PetriNetUnfolderBase]: 3942/6735 cut-off events. [2024-06-04 16:16:15,311 INFO L125 PetriNetUnfolderBase]: For 512123/512131 co-relation queries the response was YES. [2024-06-04 16:16:15,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45403 conditions, 6735 events. 3942/6735 cut-off events. For 512123/512131 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47311 event pairs, 1356 based on Foata normal form. 57/6786 useless extension candidates. Maximal degree in co-relation 45299. Up to 5434 conditions per place. [2024-06-04 16:16:15,377 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 180 selfloop transitions, 142 changer transitions 0/328 dead transitions. [2024-06-04 16:16:15,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 328 transitions, 5145 flow [2024-06-04 16:16:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:16:15,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 16:16:15,379 INFO L175 Difference]: Start difference. First operand has 208 places, 305 transitions, 4281 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:16:15,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 328 transitions, 5145 flow [2024-06-04 16:16:16,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 328 transitions, 4796 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:16,354 INFO L231 Difference]: Finished difference. Result has 209 places, 306 transitions, 4264 flow [2024-06-04 16:16:16,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3932, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4264, PETRI_PLACES=209, PETRI_TRANSITIONS=306} [2024-06-04 16:16:16,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-04 16:16:16,354 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 306 transitions, 4264 flow [2024-06-04 16:16:16,354 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 16:16:16,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:16,355 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 16:16:16,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:16:16,355 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 16:16:16,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash 226802244, now seen corresponding path program 1 times [2024-06-04 16:16:16,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:16,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067031863] [2024-06-04 16:16:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:16,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:16,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:16,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067031863] [2024-06-04 16:16:16,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067031863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:16,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:16,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:16,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889466206] [2024-06-04 16:16:16,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:16,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:16,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:16,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:16,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 306 transitions, 4264 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 16:16:16,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:16,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:16,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:17,437 INFO L124 PetriNetUnfolderBase]: 3937/6739 cut-off events. [2024-06-04 16:16:17,437 INFO L125 PetriNetUnfolderBase]: For 426071/426079 co-relation queries the response was YES. [2024-06-04 16:16:17,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45236 conditions, 6739 events. 3937/6739 cut-off events. For 426071/426079 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47564 event pairs, 1344 based on Foata normal form. 8/6744 useless extension candidates. Maximal degree in co-relation 45131. Up to 6211 conditions per place. [2024-06-04 16:16:17,503 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 293 selfloop transitions, 20 changer transitions 0/319 dead transitions. [2024-06-04 16:16:17,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 319 transitions, 4958 flow [2024-06-04 16:16:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-04 16:16:17,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:16:17,504 INFO L175 Difference]: Start difference. First operand has 209 places, 306 transitions, 4264 flow. Second operand 6 states and 129 transitions. [2024-06-04 16:16:17,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 319 transitions, 4958 flow [2024-06-04 16:16:18,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 319 transitions, 4632 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:18,448 INFO L231 Difference]: Finished difference. Result has 209 places, 308 transitions, 4029 flow [2024-06-04 16:16:18,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3938, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4029, PETRI_PLACES=209, PETRI_TRANSITIONS=308} [2024-06-04 16:16:18,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-04 16:16:18,449 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 308 transitions, 4029 flow [2024-06-04 16:16:18,449 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 16:16:18,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:18,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:18,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:16:18,450 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 16:16:18,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:18,450 INFO L85 PathProgramCache]: Analyzing trace with hash 241087044, now seen corresponding path program 2 times [2024-06-04 16:16:18,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:18,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629546538] [2024-06-04 16:16:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:18,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:18,586 INFO 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 16:16:18,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:18,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629546538] [2024-06-04 16:16:18,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629546538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:18,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:18,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:18,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204469062] [2024-06-04 16:16:18,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:18,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:18,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:18,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:18,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:18,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 308 transitions, 4029 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 16:16:18,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:18,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:18,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:19,552 INFO L124 PetriNetUnfolderBase]: 3932/6744 cut-off events. [2024-06-04 16:16:19,552 INFO L125 PetriNetUnfolderBase]: For 430709/430717 co-relation queries the response was YES. [2024-06-04 16:16:19,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44302 conditions, 6744 events. 3932/6744 cut-off events. For 430709/430717 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47689 event pairs, 1324 based on Foata normal form. 8/6749 useless extension candidates. Maximal degree in co-relation 44196. Up to 6184 conditions per place. [2024-06-04 16:16:19,625 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 294 selfloop transitions, 22 changer transitions 0/322 dead transitions. [2024-06-04 16:16:19,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 322 transitions, 4735 flow [2024-06-04 16:16:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-04 16:16:19,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:16:19,626 INFO L175 Difference]: Start difference. First operand has 209 places, 308 transitions, 4029 flow. Second operand 6 states and 129 transitions. [2024-06-04 16:16:19,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 322 transitions, 4735 flow [2024-06-04 16:16:20,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 322 transitions, 4664 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:20,430 INFO L231 Difference]: Finished difference. Result has 211 places, 310 transitions, 4057 flow [2024-06-04 16:16:20,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4057, PETRI_PLACES=211, PETRI_TRANSITIONS=310} [2024-06-04 16:16:20,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-04 16:16:20,431 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 310 transitions, 4057 flow [2024-06-04 16:16:20,431 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 16:16:20,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:20,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:20,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:16:20,432 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 16:16:20,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1461589258, now seen corresponding path program 1 times [2024-06-04 16:16:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:20,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546136538] [2024-06-04 16:16:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:20,589 INFO 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 16:16:20,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:20,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546136538] [2024-06-04 16:16:20,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546136538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:20,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:20,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:20,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747349233] [2024-06-04 16:16:20,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:20,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:20,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:20,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:20,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:20,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 310 transitions, 4057 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 16:16:20,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:20,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:20,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:21,556 INFO L124 PetriNetUnfolderBase]: 3940/6754 cut-off events. [2024-06-04 16:16:21,556 INFO L125 PetriNetUnfolderBase]: For 445395/445395 co-relation queries the response was YES. [2024-06-04 16:16:21,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44674 conditions, 6754 events. 3940/6754 cut-off events. For 445395/445395 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47768 event pairs, 1242 based on Foata normal form. 2/6754 useless extension candidates. Maximal degree in co-relation 44567. Up to 6178 conditions per place. [2024-06-04 16:16:21,626 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 304 selfloop transitions, 28 changer transitions 0/338 dead transitions. [2024-06-04 16:16:21,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 338 transitions, 4987 flow [2024-06-04 16:16:21,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-04 16:16:21,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:16:21,627 INFO L175 Difference]: Start difference. First operand has 211 places, 310 transitions, 4057 flow. Second operand 8 states and 172 transitions. [2024-06-04 16:16:21,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 338 transitions, 4987 flow [2024-06-04 16:16:22,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 338 transitions, 4904 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:22,497 INFO L231 Difference]: Finished difference. Result has 215 places, 314 transitions, 4123 flow [2024-06-04 16:16:22,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3974, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4123, PETRI_PLACES=215, PETRI_TRANSITIONS=314} [2024-06-04 16:16:22,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-04 16:16:22,497 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 314 transitions, 4123 flow [2024-06-04 16:16:22,498 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 16:16:22,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:22,498 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 16:16:22,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:16:22,498 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 16:16:22,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:22,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1464446218, now seen corresponding path program 2 times [2024-06-04 16:16:22,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:22,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710637488] [2024-06-04 16:16:22,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:22,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:22,640 INFO 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 16:16:22,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:22,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710637488] [2024-06-04 16:16:22,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710637488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:22,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:22,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:22,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369401280] [2024-06-04 16:16:22,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:22,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:22,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:22,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:22,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:22,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 314 transitions, 4123 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 16:16:22,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:22,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:22,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:23,623 INFO L124 PetriNetUnfolderBase]: 3935/6747 cut-off events. [2024-06-04 16:16:23,623 INFO L125 PetriNetUnfolderBase]: For 454963/454963 co-relation queries the response was YES. [2024-06-04 16:16:23,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44723 conditions, 6747 events. 3935/6747 cut-off events. For 454963/454963 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47709 event pairs, 1337 based on Foata normal form. 2/6747 useless extension candidates. Maximal degree in co-relation 44615. Up to 6208 conditions per place. [2024-06-04 16:16:23,692 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 302 selfloop transitions, 25 changer transitions 0/333 dead transitions. [2024-06-04 16:16:23,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 333 transitions, 4823 flow [2024-06-04 16:16:23,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:23,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-04 16:16:23,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:16:23,693 INFO L175 Difference]: Start difference. First operand has 215 places, 314 transitions, 4123 flow. Second operand 8 states and 168 transitions. [2024-06-04 16:16:23,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 333 transitions, 4823 flow [2024-06-04 16:16:24,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 333 transitions, 4727 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:24,603 INFO L231 Difference]: Finished difference. Result has 219 places, 314 transitions, 4082 flow [2024-06-04 16:16:24,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4082, PETRI_PLACES=219, PETRI_TRANSITIONS=314} [2024-06-04 16:16:24,604 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-04 16:16:24,604 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 314 transitions, 4082 flow [2024-06-04 16:16:24,604 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 16:16:24,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:24,604 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 16:16:24,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 16:16:24,605 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 16:16:24,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:24,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1579922086, now seen corresponding path program 1 times [2024-06-04 16:16:24,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:24,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932168612] [2024-06-04 16:16:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:24,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:24,745 INFO 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 16:16:24,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:24,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932168612] [2024-06-04 16:16:24,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932168612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:24,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:24,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:24,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875736163] [2024-06-04 16:16:24,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:24,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:24,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:24,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:24,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:24,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:24,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 314 transitions, 4082 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 16:16:24,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:24,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:24,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:25,838 INFO L124 PetriNetUnfolderBase]: 4111/7033 cut-off events. [2024-06-04 16:16:25,838 INFO L125 PetriNetUnfolderBase]: For 580471/580477 co-relation queries the response was YES. [2024-06-04 16:16:25,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46279 conditions, 7033 events. 4111/7033 cut-off events. For 580471/580477 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 50103 event pairs, 1403 based on Foata normal form. 55/7083 useless extension candidates. Maximal degree in co-relation 46169. Up to 5709 conditions per place. [2024-06-04 16:16:25,917 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 188 selfloop transitions, 152 changer transitions 0/346 dead transitions. [2024-06-04 16:16:25,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 346 transitions, 5042 flow [2024-06-04 16:16:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-04 16:16:25,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-04 16:16:25,918 INFO L175 Difference]: Start difference. First operand has 219 places, 314 transitions, 4082 flow. Second operand 9 states and 215 transitions. [2024-06-04 16:16:25,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 346 transitions, 5042 flow [2024-06-04 16:16:26,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 346 transitions, 4981 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:26,702 INFO L231 Difference]: Finished difference. Result has 221 places, 317 transitions, 4409 flow [2024-06-04 16:16:26,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4409, PETRI_PLACES=221, PETRI_TRANSITIONS=317} [2024-06-04 16:16:26,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-04 16:16:26,703 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 317 transitions, 4409 flow [2024-06-04 16:16:26,703 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 16:16:26,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:26,703 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 16:16:26,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 16:16:26,703 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 16:16:26,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:26,704 INFO L85 PathProgramCache]: Analyzing trace with hash 240796326, now seen corresponding path program 2 times [2024-06-04 16:16:26,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:26,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011180822] [2024-06-04 16:16:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:26,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:26,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011180822] [2024-06-04 16:16:26,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011180822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:26,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:26,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:26,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350050418] [2024-06-04 16:16:26,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:26,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:26,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:26,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:26,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:26,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 317 transitions, 4409 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 16:16:26,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:26,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:26,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:27,912 INFO L124 PetriNetUnfolderBase]: 4155/7112 cut-off events. [2024-06-04 16:16:27,912 INFO L125 PetriNetUnfolderBase]: For 512613/512621 co-relation queries the response was YES. [2024-06-04 16:16:27,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47816 conditions, 7112 events. 4155/7112 cut-off events. For 512613/512621 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 50749 event pairs, 1431 based on Foata normal form. 15/7123 useless extension candidates. Maximal degree in co-relation 47705. Up to 5975 conditions per place. [2024-06-04 16:16:27,992 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 182 selfloop transitions, 152 changer transitions 0/340 dead transitions. [2024-06-04 16:16:27,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 340 transitions, 5337 flow [2024-06-04 16:16:27,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:16:27,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-04 16:16:27,993 INFO L175 Difference]: Start difference. First operand has 221 places, 317 transitions, 4409 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:16:27,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 340 transitions, 5337 flow [2024-06-04 16:16:28,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 340 transitions, 4981 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:28,782 INFO L231 Difference]: Finished difference. Result has 222 places, 320 transitions, 4446 flow [2024-06-04 16:16:28,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4446, PETRI_PLACES=222, PETRI_TRANSITIONS=320} [2024-06-04 16:16:28,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-04 16:16:28,782 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 320 transitions, 4446 flow [2024-06-04 16:16:28,783 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 16:16:28,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:28,783 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 16:16:28,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 16:16:28,783 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 16:16:28,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:28,783 INFO L85 PathProgramCache]: Analyzing trace with hash 4620966, now seen corresponding path program 3 times [2024-06-04 16:16:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:28,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836176572] [2024-06-04 16:16:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:28,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:28,935 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 16:16:28,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:28,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836176572] [2024-06-04 16:16:28,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836176572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:28,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:28,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:28,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866437882] [2024-06-04 16:16:28,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:28,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:28,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:28,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:28,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:28,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 320 transitions, 4446 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 16:16:28,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:28,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:28,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:29,977 INFO L124 PetriNetUnfolderBase]: 4199/7180 cut-off events. [2024-06-04 16:16:29,977 INFO L125 PetriNetUnfolderBase]: For 526234/526242 co-relation queries the response was YES. [2024-06-04 16:16:30,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48104 conditions, 7180 events. 4199/7180 cut-off events. For 526234/526242 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 51216 event pairs, 1441 based on Foata normal form. 15/7191 useless extension candidates. Maximal degree in co-relation 47992. Up to 6043 conditions per place. [2024-06-04 16:16:30,056 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 145 changer transitions 0/343 dead transitions. [2024-06-04 16:16:30,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 343 transitions, 5388 flow [2024-06-04 16:16:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 16:16:30,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:16:30,057 INFO L175 Difference]: Start difference. First operand has 222 places, 320 transitions, 4446 flow. Second operand 8 states and 184 transitions. [2024-06-04 16:16:30,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 343 transitions, 5388 flow [2024-06-04 16:16:30,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 343 transitions, 5023 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:30,916 INFO L231 Difference]: Finished difference. Result has 224 places, 323 transitions, 4466 flow [2024-06-04 16:16:30,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4466, PETRI_PLACES=224, PETRI_TRANSITIONS=323} [2024-06-04 16:16:30,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-04 16:16:30,916 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 323 transitions, 4466 flow [2024-06-04 16:16:30,917 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 16:16:30,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:30,917 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 16:16:30,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 16:16:30,917 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 16:16:30,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:30,917 INFO L85 PathProgramCache]: Analyzing trace with hash 241092996, now seen corresponding path program 4 times [2024-06-04 16:16:30,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:30,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074666285] [2024-06-04 16:16:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:30,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:31,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:31,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074666285] [2024-06-04 16:16:31,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074666285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:31,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:31,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:31,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178664233] [2024-06-04 16:16:31,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:31,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:31,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:31,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:31,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:31,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 323 transitions, 4466 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 16:16:31,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:31,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:31,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:32,213 INFO L124 PetriNetUnfolderBase]: 4459/7590 cut-off events. [2024-06-04 16:16:32,213 INFO L125 PetriNetUnfolderBase]: For 631223/631231 co-relation queries the response was YES. [2024-06-04 16:16:32,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52780 conditions, 7590 events. 4459/7590 cut-off events. For 631223/631231 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 54401 event pairs, 1521 based on Foata normal form. 15/7601 useless extension candidates. Maximal degree in co-relation 52667. Up to 5704 conditions per place. [2024-06-04 16:16:32,436 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 157 changer transitions 0/355 dead transitions. [2024-06-04 16:16:32,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 355 transitions, 5648 flow [2024-06-04 16:16:32,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:16:32,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-04 16:16:32,437 INFO L175 Difference]: Start difference. First operand has 224 places, 323 transitions, 4466 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:16:32,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 355 transitions, 5648 flow [2024-06-04 16:16:33,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 355 transitions, 5291 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:33,618 INFO L231 Difference]: Finished difference. Result has 227 places, 328 transitions, 4600 flow [2024-06-04 16:16:33,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4109, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4600, PETRI_PLACES=227, PETRI_TRANSITIONS=328} [2024-06-04 16:16:33,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-04 16:16:33,619 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 328 transitions, 4600 flow [2024-06-04 16:16:33,619 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 16:16:33,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:33,619 INFO 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 16:16:33,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 16:16:33,619 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 16:16:33,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash 388588660, now seen corresponding path program 1 times [2024-06-04 16:16:33,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:33,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102077798] [2024-06-04 16:16:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:33,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:33,774 INFO 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 16:16:33,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:33,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102077798] [2024-06-04 16:16:33,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102077798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:33,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:33,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:33,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275368382] [2024-06-04 16:16:33,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:33,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:33,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:33,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:33,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:33,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:33,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 328 transitions, 4600 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 16:16:33,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:33,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:33,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:35,129 INFO L124 PetriNetUnfolderBase]: 4992/8498 cut-off events. [2024-06-04 16:16:35,129 INFO L125 PetriNetUnfolderBase]: For 903004/903014 co-relation queries the response was YES. [2024-06-04 16:16:35,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62443 conditions, 8498 events. 4992/8498 cut-off events. For 903004/903014 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 62354 event pairs, 1654 based on Foata normal form. 44/8539 useless extension candidates. Maximal degree in co-relation 62328. Up to 6554 conditions per place. [2024-06-04 16:16:35,238 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 328 selfloop transitions, 39 changer transitions 9/382 dead transitions. [2024-06-04 16:16:35,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 382 transitions, 6003 flow [2024-06-04 16:16:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 16:16:35,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-04 16:16:35,240 INFO L175 Difference]: Start difference. First operand has 227 places, 328 transitions, 4600 flow. Second operand 8 states and 197 transitions. [2024-06-04 16:16:35,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 382 transitions, 6003 flow [2024-06-04 16:16:36,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 382 transitions, 5541 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:36,439 INFO L231 Difference]: Finished difference. Result has 231 places, 335 transitions, 4444 flow [2024-06-04 16:16:36,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4444, PETRI_PLACES=231, PETRI_TRANSITIONS=335} [2024-06-04 16:16:36,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-04 16:16:36,439 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 335 transitions, 4444 flow [2024-06-04 16:16:36,439 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 16:16:36,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:36,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:36,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 16:16:36,440 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 16:16:36,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:36,440 INFO L85 PathProgramCache]: Analyzing trace with hash 372845572, now seen corresponding path program 2 times [2024-06-04 16:16:36,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:36,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188683470] [2024-06-04 16:16:36,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:36,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:36,591 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 16:16:36,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:36,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188683470] [2024-06-04 16:16:36,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188683470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:36,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:36,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:36,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504713422] [2024-06-04 16:16:36,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:36,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:36,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:36,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:36,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 335 transitions, 4444 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 16:16:36,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:36,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:36,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:37,957 INFO L124 PetriNetUnfolderBase]: 5066/8651 cut-off events. [2024-06-04 16:16:37,957 INFO L125 PetriNetUnfolderBase]: For 1009610/1009617 co-relation queries the response was YES. [2024-06-04 16:16:38,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62624 conditions, 8651 events. 5066/8651 cut-off events. For 1009610/1009617 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 64235 event pairs, 1789 based on Foata normal form. 66/8714 useless extension candidates. Maximal degree in co-relation 62507. Up to 6574 conditions per place. [2024-06-04 16:16:38,063 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 216 selfloop transitions, 145 changer transitions 9/376 dead transitions. [2024-06-04 16:16:38,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 376 transitions, 5619 flow [2024-06-04 16:16:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-04 16:16:38,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-04 16:16:38,064 INFO L175 Difference]: Start difference. First operand has 231 places, 335 transitions, 4444 flow. Second operand 9 states and 218 transitions. [2024-06-04 16:16:38,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 376 transitions, 5619 flow [2024-06-04 16:16:39,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 376 transitions, 5542 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-04 16:16:39,752 INFO L231 Difference]: Finished difference. Result has 238 places, 331 transitions, 4603 flow [2024-06-04 16:16:39,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4367, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4603, PETRI_PLACES=238, PETRI_TRANSITIONS=331} [2024-06-04 16:16:39,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-04 16:16:39,753 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 331 transitions, 4603 flow [2024-06-04 16:16:39,753 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 16:16:39,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:39,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:39,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 16:16:39,753 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 16:16:39,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:39,754 INFO L85 PathProgramCache]: Analyzing trace with hash 373172002, now seen corresponding path program 3 times [2024-06-04 16:16:39,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:39,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412375835] [2024-06-04 16:16:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:39,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:39,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:39,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412375835] [2024-06-04 16:16:39,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412375835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:39,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:39,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:39,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960659463] [2024-06-04 16:16:39,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:39,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:39,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:39,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:39,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:39,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:39,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 331 transitions, 4603 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 16:16:39,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:39,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:39,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:41,289 INFO L124 PetriNetUnfolderBase]: 4794/8210 cut-off events. [2024-06-04 16:16:41,289 INFO L125 PetriNetUnfolderBase]: For 892319/892326 co-relation queries the response was YES. [2024-06-04 16:16:41,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57150 conditions, 8210 events. 4794/8210 cut-off events. For 892319/892326 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 60499 event pairs, 1748 based on Foata normal form. 74/8281 useless extension candidates. Maximal degree in co-relation 57030. Up to 6736 conditions per place. [2024-06-04 16:16:41,368 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 133 changer transitions 12/363 dead transitions. [2024-06-04 16:16:41,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 363 transitions, 5547 flow [2024-06-04 16:16:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 16:16:41,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-04 16:16:41,369 INFO L175 Difference]: Start difference. First operand has 238 places, 331 transitions, 4603 flow. Second operand 9 states and 211 transitions. [2024-06-04 16:16:41,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 363 transitions, 5547 flow [2024-06-04 16:16:42,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 363 transitions, 5210 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:42,745 INFO L231 Difference]: Finished difference. Result has 241 places, 321 transitions, 4401 flow [2024-06-04 16:16:42,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4266, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4401, PETRI_PLACES=241, PETRI_TRANSITIONS=321} [2024-06-04 16:16:42,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-04 16:16:42,746 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 321 transitions, 4401 flow [2024-06-04 16:16:42,746 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 16:16:42,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:42,746 INFO 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 16:16:42,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 16:16:42,746 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 16:16:42,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:42,747 INFO L85 PathProgramCache]: Analyzing trace with hash 687469400, now seen corresponding path program 4 times [2024-06-04 16:16:42,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:42,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438936008] [2024-06-04 16:16:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:42,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:42,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:42,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438936008] [2024-06-04 16:16:42,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438936008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:42,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:42,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:42,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023837737] [2024-06-04 16:16:42,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:42,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:42,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:42,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:42,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:42,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:42,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 321 transitions, 4401 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 16:16:42,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:42,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:42,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:44,106 INFO L124 PetriNetUnfolderBase]: 4629/7895 cut-off events. [2024-06-04 16:16:44,107 INFO L125 PetriNetUnfolderBase]: For 847951/847956 co-relation queries the response was YES. [2024-06-04 16:16:44,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55932 conditions, 7895 events. 4629/7895 cut-off events. For 847951/847956 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 57456 event pairs, 1687 based on Foata normal form. 44/7935 useless extension candidates. Maximal degree in co-relation 55811. Up to 6608 conditions per place. [2024-06-04 16:16:44,196 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 141 changer transitions 3/345 dead transitions. [2024-06-04 16:16:44,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 345 transitions, 5322 flow [2024-06-04 16:16:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:16:44,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-04 16:16:44,197 INFO L175 Difference]: Start difference. First operand has 241 places, 321 transitions, 4401 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:16:44,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 345 transitions, 5322 flow [2024-06-04 16:16:45,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 345 transitions, 5032 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:16:45,474 INFO L231 Difference]: Finished difference. Result has 240 places, 322 transitions, 4425 flow [2024-06-04 16:16:45,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4111, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4425, PETRI_PLACES=240, PETRI_TRANSITIONS=322} [2024-06-04 16:16:45,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-04 16:16:45,474 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 322 transitions, 4425 flow [2024-06-04 16:16:45,475 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 16:16:45,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:45,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:45,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 16:16:45,475 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 16:16:45,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:45,475 INFO L85 PathProgramCache]: Analyzing trace with hash 676744640, now seen corresponding path program 5 times [2024-06-04 16:16:45,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:45,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816220026] [2024-06-04 16:16:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:45,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:45,621 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 16:16:45,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:45,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816220026] [2024-06-04 16:16:45,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816220026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:45,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:45,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:45,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997706074] [2024-06-04 16:16:45,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:45,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:45,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:45,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 322 transitions, 4425 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 16:16:45,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:45,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:45,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:46,824 INFO L124 PetriNetUnfolderBase]: 4709/8055 cut-off events. [2024-06-04 16:16:46,824 INFO L125 PetriNetUnfolderBase]: For 856064/856069 co-relation queries the response was YES. [2024-06-04 16:16:46,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56359 conditions, 8055 events. 4709/8055 cut-off events. For 856064/856069 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59079 event pairs, 1741 based on Foata normal form. 44/8095 useless extension candidates. Maximal degree in co-relation 56237. Up to 6748 conditions per place. [2024-06-04 16:16:46,917 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 133 changer transitions 4/346 dead transitions. [2024-06-04 16:16:46,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 346 transitions, 5354 flow [2024-06-04 16:16:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:16:46,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-04 16:16:46,918 INFO L175 Difference]: Start difference. First operand has 240 places, 322 transitions, 4425 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:16:46,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 346 transitions, 5354 flow [2024-06-04 16:16:48,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 346 transitions, 5052 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:48,170 INFO L231 Difference]: Finished difference. Result has 242 places, 322 transitions, 4415 flow [2024-06-04 16:16:48,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4123, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4415, PETRI_PLACES=242, PETRI_TRANSITIONS=322} [2024-06-04 16:16:48,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-04 16:16:48,171 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 322 transitions, 4415 flow [2024-06-04 16:16:48,171 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 16:16:48,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:48,171 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] [2024-06-04 16:16:48,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 16:16:48,172 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 16:16:48,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:48,172 INFO L85 PathProgramCache]: Analyzing trace with hash 676418210, now seen corresponding path program 6 times [2024-06-04 16:16:48,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:48,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176383022] [2024-06-04 16:16:48,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:48,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:48,315 INFO 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 16:16:48,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:48,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176383022] [2024-06-04 16:16:48,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176383022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:48,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:48,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:48,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470909195] [2024-06-04 16:16:48,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:48,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:48,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:48,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:48,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:48,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:48,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 322 transitions, 4415 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 16:16:48,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:48,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:48,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:49,643 INFO L124 PetriNetUnfolderBase]: 4792/8206 cut-off events. [2024-06-04 16:16:49,644 INFO L125 PetriNetUnfolderBase]: For 858637/858642 co-relation queries the response was YES. [2024-06-04 16:16:49,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56928 conditions, 8206 events. 4792/8206 cut-off events. For 858637/858642 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 60394 event pairs, 1712 based on Foata normal form. 38/8236 useless extension candidates. Maximal degree in co-relation 56805. Up to 6231 conditions per place. [2024-06-04 16:16:49,731 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 200 selfloop transitions, 137 changer transitions 9/352 dead transitions. [2024-06-04 16:16:49,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 352 transitions, 5395 flow [2024-06-04 16:16:49,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:49,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:16:49,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-04 16:16:49,732 INFO L175 Difference]: Start difference. First operand has 242 places, 322 transitions, 4415 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:16:49,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 352 transitions, 5395 flow [2024-06-04 16:16:51,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 352 transitions, 5105 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:51,213 INFO L231 Difference]: Finished difference. Result has 244 places, 320 transitions, 4390 flow [2024-06-04 16:16:51,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4125, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4390, PETRI_PLACES=244, PETRI_TRANSITIONS=320} [2024-06-04 16:16:51,214 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-04 16:16:51,214 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 320 transitions, 4390 flow [2024-06-04 16:16:51,214 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 16:16:51,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:51,214 INFO 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 16:16:51,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 16:16:51,215 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 16:16:51,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:51,215 INFO L85 PathProgramCache]: Analyzing trace with hash 687869114, now seen corresponding path program 1 times [2024-06-04 16:16:51,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:51,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914990090] [2024-06-04 16:16:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:51,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:51,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:51,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914990090] [2024-06-04 16:16:51,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914990090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:51,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:51,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:51,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186640419] [2024-06-04 16:16:51,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:51,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:51,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:51,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:51,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:51,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:51,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 320 transitions, 4390 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 16:16:51,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:51,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:51,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:52,595 INFO L124 PetriNetUnfolderBase]: 4659/8005 cut-off events. [2024-06-04 16:16:52,596 INFO L125 PetriNetUnfolderBase]: For 781262/781267 co-relation queries the response was YES. [2024-06-04 16:16:52,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53701 conditions, 8005 events. 4659/8005 cut-off events. For 781262/781267 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 58727 event pairs, 1636 based on Foata normal form. 38/8039 useless extension candidates. Maximal degree in co-relation 53577. Up to 5824 conditions per place. [2024-06-04 16:16:52,686 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 146 changer transitions 4/348 dead transitions. [2024-06-04 16:16:52,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 348 transitions, 5312 flow [2024-06-04 16:16:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:16:52,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-04 16:16:52,687 INFO L175 Difference]: Start difference. First operand has 244 places, 320 transitions, 4390 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:16:52,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 348 transitions, 5312 flow [2024-06-04 16:16:54,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 348 transitions, 4980 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:54,327 INFO L231 Difference]: Finished difference. Result has 246 places, 319 transitions, 4346 flow [2024-06-04 16:16:54,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4058, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4346, PETRI_PLACES=246, PETRI_TRANSITIONS=319} [2024-06-04 16:16:54,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-04 16:16:54,327 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 319 transitions, 4346 flow [2024-06-04 16:16:54,327 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 16:16:54,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:54,328 INFO 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 16:16:54,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 16:16:54,328 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 16:16:54,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1559063686, now seen corresponding path program 2 times [2024-06-04 16:16:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:54,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338312293] [2024-06-04 16:16:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:54,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:54,465 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 16:16:54,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:54,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338312293] [2024-06-04 16:16:54,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338312293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:54,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:54,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:54,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976533025] [2024-06-04 16:16:54,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:54,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:54,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:54,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:54,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:54,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 319 transitions, 4346 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 16:16:54,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:54,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:54,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:55,739 INFO L124 PetriNetUnfolderBase]: 4794/8218 cut-off events. [2024-06-04 16:16:55,739 INFO L125 PetriNetUnfolderBase]: For 797618/797623 co-relation queries the response was YES. [2024-06-04 16:16:55,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54790 conditions, 8218 events. 4794/8218 cut-off events. For 797618/797623 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 60595 event pairs, 1650 based on Foata normal form. 44/8250 useless extension candidates. Maximal degree in co-relation 54665. Up to 6387 conditions per place. [2024-06-04 16:16:55,841 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 216 selfloop transitions, 136 changer transitions 0/358 dead transitions. [2024-06-04 16:16:55,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 358 transitions, 5696 flow [2024-06-04 16:16:55,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:16:55,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-04 16:16:55,843 INFO L175 Difference]: Start difference. First operand has 246 places, 319 transitions, 4346 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:16:55,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 358 transitions, 5696 flow [2024-06-04 16:16:57,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 358 transitions, 5336 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-04 16:16:57,193 INFO L231 Difference]: Finished difference. Result has 246 places, 329 transitions, 4558 flow [2024-06-04 16:16:57,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3986, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4558, PETRI_PLACES=246, PETRI_TRANSITIONS=329} [2024-06-04 16:16:57,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-04 16:16:57,194 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 329 transitions, 4558 flow [2024-06-04 16:16:57,194 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 16:16:57,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:57,195 INFO 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 16:16:57,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 16:16:57,195 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 16:16:57,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:57,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1116234886, now seen corresponding path program 3 times [2024-06-04 16:16:57,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:57,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535068085] [2024-06-04 16:16:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:57,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:57,329 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 16:16:57,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:57,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535068085] [2024-06-04 16:16:57,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535068085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:57,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:57,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:57,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309093329] [2024-06-04 16:16:57,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:57,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:57,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:57,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:57,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:57,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:16:57,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 329 transitions, 4558 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 16:16:57,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:57,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:16:57,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:58,766 INFO L124 PetriNetUnfolderBase]: 5348/9172 cut-off events. [2024-06-04 16:16:58,766 INFO L125 PetriNetUnfolderBase]: For 1037793/1037798 co-relation queries the response was YES. [2024-06-04 16:16:58,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66170 conditions, 9172 events. 5348/9172 cut-off events. For 1037793/1037798 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 68782 event pairs, 1765 based on Foata normal form. 44/9202 useless extension candidates. Maximal degree in co-relation 66045. Up to 4898 conditions per place. [2024-06-04 16:16:58,871 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 230 selfloop transitions, 143 changer transitions 0/379 dead transitions. [2024-06-04 16:16:58,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 379 transitions, 6273 flow [2024-06-04 16:16:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 16:16:58,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-04 16:16:58,872 INFO L175 Difference]: Start difference. First operand has 246 places, 329 transitions, 4558 flow. Second operand 8 states and 198 transitions. [2024-06-04 16:16:58,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 379 transitions, 6273 flow [2024-06-04 16:17:00,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 379 transitions, 6034 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-04 16:17:00,703 INFO L231 Difference]: Finished difference. Result has 252 places, 338 transitions, 4939 flow [2024-06-04 16:17:00,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4939, PETRI_PLACES=252, PETRI_TRANSITIONS=338} [2024-06-04 16:17:00,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-04 16:17:00,703 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 338 transitions, 4939 flow [2024-06-04 16:17:00,704 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 16:17:00,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:00,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 16:17:00,704 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 16:17:00,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash 363134312, now seen corresponding path program 1 times [2024-06-04 16:17:00,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:00,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563398481] [2024-06-04 16:17:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:00,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:00,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563398481] [2024-06-04 16:17:00,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563398481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:00,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:00,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:00,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102609393] [2024-06-04 16:17:00,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:00,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:00,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:00,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:00,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:00,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:00,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 338 transitions, 4939 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 16:17:00,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:00,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:00,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:02,681 INFO L124 PetriNetUnfolderBase]: 6257/10712 cut-off events. [2024-06-04 16:17:02,682 INFO L125 PetriNetUnfolderBase]: For 1431067/1431070 co-relation queries the response was YES. [2024-06-04 16:17:02,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83625 conditions, 10712 events. 6257/10712 cut-off events. For 1431067/1431070 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 83447 event pairs, 1953 based on Foata normal form. 42/10749 useless extension candidates. Maximal degree in co-relation 83496. Up to 7287 conditions per place. [2024-06-04 16:17:02,802 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 329 selfloop transitions, 75 changer transitions 0/410 dead transitions. [2024-06-04 16:17:02,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 410 transitions, 6917 flow [2024-06-04 16:17:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 16:17:02,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:17:02,803 INFO L175 Difference]: Start difference. First operand has 252 places, 338 transitions, 4939 flow. Second operand 8 states and 200 transitions. [2024-06-04 16:17:02,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 410 transitions, 6917 flow [2024-06-04 16:17:05,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 410 transitions, 6411 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-04 16:17:05,281 INFO L231 Difference]: Finished difference. Result has 254 places, 354 transitions, 5143 flow [2024-06-04 16:17:05,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5143, PETRI_PLACES=254, PETRI_TRANSITIONS=354} [2024-06-04 16:17:05,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-04 16:17:05,282 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 354 transitions, 5143 flow [2024-06-04 16:17:05,282 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 16:17:05,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:05,282 INFO 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 16:17:05,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 16:17:05,283 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 16:17:05,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:05,283 INFO L85 PathProgramCache]: Analyzing trace with hash -204313256, now seen corresponding path program 2 times [2024-06-04 16:17:05,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:05,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806582253] [2024-06-04 16:17:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:05,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:05,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:05,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806582253] [2024-06-04 16:17:05,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806582253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:05,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:05,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:05,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344561334] [2024-06-04 16:17:05,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:05,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:05,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:05,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:05,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:05,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:05,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 354 transitions, 5143 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 16:17:05,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:05,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:05,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:07,284 INFO L124 PetriNetUnfolderBase]: 6081/10422 cut-off events. [2024-06-04 16:17:07,284 INFO L125 PetriNetUnfolderBase]: For 1265990/1265993 co-relation queries the response was YES. [2024-06-04 16:17:07,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77090 conditions, 10422 events. 6081/10422 cut-off events. For 1265990/1265993 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 80749 event pairs, 2245 based on Foata normal form. 42/10459 useless extension candidates. Maximal degree in co-relation 76962. Up to 8445 conditions per place. [2024-06-04 16:17:07,407 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 242 selfloop transitions, 150 changer transitions 0/398 dead transitions. [2024-06-04 16:17:07,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 398 transitions, 6601 flow [2024-06-04 16:17:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-04 16:17:07,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-04 16:17:07,408 INFO L175 Difference]: Start difference. First operand has 254 places, 354 transitions, 5143 flow. Second operand 9 states and 218 transitions. [2024-06-04 16:17:07,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 398 transitions, 6601 flow [2024-06-04 16:17:09,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 398 transitions, 6422 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-04 16:17:09,737 INFO L231 Difference]: Finished difference. Result has 261 places, 362 transitions, 5565 flow [2024-06-04 16:17:09,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4964, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5565, PETRI_PLACES=261, PETRI_TRANSITIONS=362} [2024-06-04 16:17:09,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-04 16:17:09,737 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 362 transitions, 5565 flow [2024-06-04 16:17:09,738 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 16:17:09,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:09,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:09,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 16:17:09,738 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 16:17:09,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:09,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1727220486, now seen corresponding path program 3 times [2024-06-04 16:17:09,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:09,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265290812] [2024-06-04 16:17:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:09,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:09,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:09,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265290812] [2024-06-04 16:17:09,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265290812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:09,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:09,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:09,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769785739] [2024-06-04 16:17:09,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:09,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:09,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:09,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:09,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:09,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:09,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 362 transitions, 5565 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 16:17:09,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:09,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:09,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:11,948 INFO L124 PetriNetUnfolderBase]: 6297/10875 cut-off events. [2024-06-04 16:17:11,949 INFO L125 PetriNetUnfolderBase]: For 1393901/1393904 co-relation queries the response was YES. [2024-06-04 16:17:12,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78963 conditions, 10875 events. 6297/10875 cut-off events. For 1393901/1393904 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 85734 event pairs, 2161 based on Foata normal form. 72/10942 useless extension candidates. Maximal degree in co-relation 78832. Up to 7885 conditions per place. [2024-06-04 16:17:12,056 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 233 selfloop transitions, 158 changer transitions 7/404 dead transitions. [2024-06-04 16:17:12,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 404 transitions, 6846 flow [2024-06-04 16:17:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-04 16:17:12,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 16:17:12,058 INFO L175 Difference]: Start difference. First operand has 261 places, 362 transitions, 5565 flow. Second operand 9 states and 219 transitions. [2024-06-04 16:17:12,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 404 transitions, 6846 flow [2024-06-04 16:17:14,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 404 transitions, 6557 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-04 16:17:14,419 INFO L231 Difference]: Finished difference. Result has 265 places, 361 transitions, 5589 flow [2024-06-04 16:17:14,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5276, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5589, PETRI_PLACES=265, PETRI_TRANSITIONS=361} [2024-06-04 16:17:14,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-04 16:17:14,420 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 361 transitions, 5589 flow [2024-06-04 16:17:14,420 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 16:17:14,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:14,420 INFO 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 16:17:14,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 16:17:14,420 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 16:17:14,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:14,421 INFO L85 PathProgramCache]: Analyzing trace with hash -788715436, now seen corresponding path program 4 times [2024-06-04 16:17:14,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:14,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497384409] [2024-06-04 16:17:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:14,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:14,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:14,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497384409] [2024-06-04 16:17:14,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497384409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:14,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:14,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:14,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8808543] [2024-06-04 16:17:14,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:14,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:14,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:14,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:14,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:14,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 361 transitions, 5589 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 16:17:14,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:14,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:14,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:16,366 INFO L124 PetriNetUnfolderBase]: 6459/11150 cut-off events. [2024-06-04 16:17:16,366 INFO L125 PetriNetUnfolderBase]: For 1465758/1465761 co-relation queries the response was YES. [2024-06-04 16:17:16,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80328 conditions, 11150 events. 6459/11150 cut-off events. For 1465758/1465761 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 88346 event pairs, 2589 based on Foata normal form. 84/11229 useless extension candidates. Maximal degree in co-relation 80195. Up to 9472 conditions per place. [2024-06-04 16:17:16,505 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 145 changer transitions 7/393 dead transitions. [2024-06-04 16:17:16,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 393 transitions, 6662 flow [2024-06-04 16:17:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-04 16:17:16,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-04 16:17:16,506 INFO L175 Difference]: Start difference. First operand has 265 places, 361 transitions, 5589 flow. Second operand 9 states and 209 transitions. [2024-06-04 16:17:16,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 393 transitions, 6662 flow [2024-06-04 16:17:19,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 393 transitions, 6369 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:19,457 INFO L231 Difference]: Finished difference. Result has 268 places, 359 transitions, 5572 flow [2024-06-04 16:17:19,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5298, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5572, PETRI_PLACES=268, PETRI_TRANSITIONS=359} [2024-06-04 16:17:19,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-04 16:17:19,458 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 359 transitions, 5572 flow [2024-06-04 16:17:19,458 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 16:17:19,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:19,458 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 16:17:19,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 16:17:19,458 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 16:17:19,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:19,458 INFO L85 PathProgramCache]: Analyzing trace with hash -919744032, now seen corresponding path program 5 times [2024-06-04 16:17:19,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:19,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048207673] [2024-06-04 16:17:19,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:19,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:19,600 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 16:17:19,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:19,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048207673] [2024-06-04 16:17:19,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048207673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:19,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:19,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:19,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756305124] [2024-06-04 16:17:19,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:19,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:19,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:19,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:19,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:19,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:19,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 359 transitions, 5572 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 16:17:19,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:19,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:19,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:21,783 INFO L124 PetriNetUnfolderBase]: 6408/11085 cut-off events. [2024-06-04 16:17:21,784 INFO L125 PetriNetUnfolderBase]: For 1360557/1360560 co-relation queries the response was YES. [2024-06-04 16:17:21,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76623 conditions, 11085 events. 6408/11085 cut-off events. For 1360557/1360560 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 88150 event pairs, 2572 based on Foata normal form. 84/11164 useless extension candidates. Maximal degree in co-relation 76489. Up to 9417 conditions per place. [2024-06-04 16:17:21,900 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 239 selfloop transitions, 140 changer transitions 5/390 dead transitions. [2024-06-04 16:17:21,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 390 transitions, 6622 flow [2024-06-04 16:17:21,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:21,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-04 16:17:21,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-04 16:17:21,908 INFO L175 Difference]: Start difference. First operand has 268 places, 359 transitions, 5572 flow. Second operand 9 states and 209 transitions. [2024-06-04 16:17:21,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 390 transitions, 6622 flow [2024-06-04 16:17:24,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 390 transitions, 6289 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 16:17:24,277 INFO L231 Difference]: Finished difference. Result has 269 places, 358 transitions, 5505 flow [2024-06-04 16:17:24,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5239, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5505, PETRI_PLACES=269, PETRI_TRANSITIONS=358} [2024-06-04 16:17:24,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-04 16:17:24,278 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 358 transitions, 5505 flow [2024-06-04 16:17:24,278 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 16:17:24,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:24,279 INFO 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 16:17:24,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 16:17:24,279 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 16:17:24,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:24,279 INFO L85 PathProgramCache]: Analyzing trace with hash -919528830, now seen corresponding path program 1 times [2024-06-04 16:17:24,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:24,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565100893] [2024-06-04 16:17:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:24,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:24,464 INFO 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 16:17:24,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:24,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565100893] [2024-06-04 16:17:24,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565100893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:24,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:24,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:24,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419169231] [2024-06-04 16:17:24,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:24,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:24,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:24,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:24,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:24,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:24,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 358 transitions, 5505 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 16:17:24,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:24,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:24,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:26,799 INFO L124 PetriNetUnfolderBase]: 6478/11275 cut-off events. [2024-06-04 16:17:26,799 INFO L125 PetriNetUnfolderBase]: For 1315337/1315340 co-relation queries the response was YES. [2024-06-04 16:17:26,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76422 conditions, 11275 events. 6478/11275 cut-off events. For 1315337/1315340 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 90423 event pairs, 2514 based on Foata normal form. 72/11342 useless extension candidates. Maximal degree in co-relation 76288. Up to 8649 conditions per place. [2024-06-04 16:17:26,916 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 236 selfloop transitions, 147 changer transitions 7/396 dead transitions. [2024-06-04 16:17:26,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 396 transitions, 6676 flow [2024-06-04 16:17:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-04 16:17:26,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-04 16:17:26,919 INFO L175 Difference]: Start difference. First operand has 269 places, 358 transitions, 5505 flow. Second operand 9 states and 214 transitions. [2024-06-04 16:17:26,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 396 transitions, 6676 flow [2024-06-04 16:17:29,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 396 transitions, 6378 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:29,446 INFO L231 Difference]: Finished difference. Result has 271 places, 359 transitions, 5592 flow [2024-06-04 16:17:29,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5207, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5592, PETRI_PLACES=271, PETRI_TRANSITIONS=359} [2024-06-04 16:17:29,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-04 16:17:29,446 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 359 transitions, 5592 flow [2024-06-04 16:17:29,447 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 16:17:29,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:29,447 INFO 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 16:17:29,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 16:17:29,447 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 16:17:29,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:29,448 INFO L85 PathProgramCache]: Analyzing trace with hash 242107168, now seen corresponding path program 6 times [2024-06-04 16:17:29,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:29,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513186374] [2024-06-04 16:17:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:29,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:29,585 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 16:17:29,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:29,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513186374] [2024-06-04 16:17:29,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513186374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:29,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:29,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:29,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542186449] [2024-06-04 16:17:29,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:29,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:29,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:29,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:29,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:29,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:29,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 359 transitions, 5592 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 16:17:29,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:29,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:29,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:31,695 INFO L124 PetriNetUnfolderBase]: 6289/10973 cut-off events. [2024-06-04 16:17:31,695 INFO L125 PetriNetUnfolderBase]: For 1098317/1098322 co-relation queries the response was YES. [2024-06-04 16:17:31,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72234 conditions, 10973 events. 6289/10973 cut-off events. For 1098317/1098322 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 87975 event pairs, 2563 based on Foata normal form. 44/11013 useless extension candidates. Maximal degree in co-relation 72099. Up to 9470 conditions per place. [2024-06-04 16:17:31,818 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 252 selfloop transitions, 119 changer transitions 4/381 dead transitions. [2024-06-04 16:17:31,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 381 transitions, 6572 flow [2024-06-04 16:17:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 16:17:31,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:17:31,819 INFO L175 Difference]: Start difference. First operand has 271 places, 359 transitions, 5592 flow. Second operand 8 states and 184 transitions. [2024-06-04 16:17:31,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 381 transitions, 6572 flow [2024-06-04 16:17:34,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 381 transitions, 6175 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:34,086 INFO L231 Difference]: Finished difference. Result has 272 places, 357 transitions, 5403 flow [2024-06-04 16:17:34,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5195, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5403, PETRI_PLACES=272, PETRI_TRANSITIONS=357} [2024-06-04 16:17:34,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-04 16:17:34,102 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 357 transitions, 5403 flow [2024-06-04 16:17:34,102 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 16:17:34,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:34,103 INFO 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 16:17:34,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 16:17:34,103 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 16:17:34,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:34,103 INFO L85 PathProgramCache]: Analyzing trace with hash 242322370, now seen corresponding path program 2 times [2024-06-04 16:17:34,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:34,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361795150] [2024-06-04 16:17:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:34,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:34,303 INFO 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 16:17:34,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:34,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361795150] [2024-06-04 16:17:34,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361795150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:34,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:34,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:34,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107650743] [2024-06-04 16:17:34,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:34,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:34,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:34,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:34,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:34,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:34,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 357 transitions, 5403 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 16:17:34,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:34,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:34,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:36,397 INFO L124 PetriNetUnfolderBase]: 6275/10977 cut-off events. [2024-06-04 16:17:36,397 INFO L125 PetriNetUnfolderBase]: For 1094214/1094219 co-relation queries the response was YES. [2024-06-04 16:17:36,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71679 conditions, 10977 events. 6275/10977 cut-off events. For 1094214/1094219 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 88104 event pairs, 2515 based on Foata normal form. 38/11011 useless extension candidates. Maximal degree in co-relation 71543. Up to 9250 conditions per place. [2024-06-04 16:17:36,518 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 253 selfloop transitions, 119 changer transitions 9/387 dead transitions. [2024-06-04 16:17:36,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 387 transitions, 6503 flow [2024-06-04 16:17:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 16:17:36,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-04 16:17:36,519 INFO L175 Difference]: Start difference. First operand has 272 places, 357 transitions, 5403 flow. Second operand 8 states and 190 transitions. [2024-06-04 16:17:36,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 387 transitions, 6503 flow [2024-06-04 16:17:38,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 387 transitions, 6163 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 16:17:38,638 INFO L231 Difference]: Finished difference. Result has 272 places, 355 transitions, 5345 flow [2024-06-04 16:17:38,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5063, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5345, PETRI_PLACES=272, PETRI_TRANSITIONS=355} [2024-06-04 16:17:38,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-04 16:17:38,638 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 355 transitions, 5345 flow [2024-06-04 16:17:38,639 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 16:17:38,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:38,639 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] [2024-06-04 16:17:38,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 16:17:38,639 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 16:17:38,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:38,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1116050188, now seen corresponding path program 3 times [2024-06-04 16:17:38,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:38,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811910696] [2024-06-04 16:17:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:38,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:38,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:38,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811910696] [2024-06-04 16:17:38,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811910696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:38,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:38,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:38,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830797874] [2024-06-04 16:17:38,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:38,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:38,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:38,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:38,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:38,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:38,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 355 transitions, 5345 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 16:17:38,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:38,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:38,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:40,977 INFO L124 PetriNetUnfolderBase]: 6299/11019 cut-off events. [2024-06-04 16:17:40,977 INFO L125 PetriNetUnfolderBase]: For 1192791/1192796 co-relation queries the response was YES. [2024-06-04 16:17:41,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73478 conditions, 11019 events. 6299/11019 cut-off events. For 1192791/1192796 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 88148 event pairs, 2447 based on Foata normal form. 38/11053 useless extension candidates. Maximal degree in co-relation 73341. Up to 7041 conditions per place. [2024-06-04 16:17:41,111 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 122 changer transitions 12/389 dead transitions. [2024-06-04 16:17:41,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 389 transitions, 6607 flow [2024-06-04 16:17:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:17:41,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-04 16:17:41,112 INFO L175 Difference]: Start difference. First operand has 272 places, 355 transitions, 5345 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:17:41,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 389 transitions, 6607 flow [2024-06-04 16:17:43,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 389 transitions, 6296 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:43,593 INFO L231 Difference]: Finished difference. Result has 274 places, 350 transitions, 5296 flow [2024-06-04 16:17:43,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5034, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5296, PETRI_PLACES=274, PETRI_TRANSITIONS=350} [2024-06-04 16:17:43,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-04 16:17:43,594 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 350 transitions, 5296 flow [2024-06-04 16:17:43,594 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 16:17:43,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:43,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:43,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 16:17:43,595 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 16:17:43,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:43,595 INFO L85 PathProgramCache]: Analyzing trace with hash -838867009, now seen corresponding path program 1 times [2024-06-04 16:17:43,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:43,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138180230] [2024-06-04 16:17:43,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:43,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:43,755 INFO 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 16:17:43,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:43,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138180230] [2024-06-04 16:17:43,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138180230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:43,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:43,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:43,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203240786] [2024-06-04 16:17:43,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:43,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:43,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:43,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:43,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:43,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:43,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 350 transitions, 5296 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 16:17:43,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:43,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:43,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:46,077 INFO L124 PetriNetUnfolderBase]: 6433/11221 cut-off events. [2024-06-04 16:17:46,077 INFO L125 PetriNetUnfolderBase]: For 1187211/1187213 co-relation queries the response was YES. [2024-06-04 16:17:46,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77335 conditions, 11221 events. 6433/11221 cut-off events. For 1187211/1187213 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 90137 event pairs, 2120 based on Foata normal form. 10/11171 useless extension candidates. Maximal degree in co-relation 77197. Up to 8893 conditions per place. [2024-06-04 16:17:46,198 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 331 selfloop transitions, 71 changer transitions 1/409 dead transitions. [2024-06-04 16:17:46,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 409 transitions, 6962 flow [2024-06-04 16:17:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:17:46,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:17:46,199 INFO L175 Difference]: Start difference. First operand has 274 places, 350 transitions, 5296 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:17:46,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 409 transitions, 6962 flow [2024-06-04 16:17:48,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 409 transitions, 6415 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-04 16:17:48,364 INFO L231 Difference]: Finished difference. Result has 274 places, 364 transitions, 5250 flow [2024-06-04 16:17:48,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4752, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5250, PETRI_PLACES=274, PETRI_TRANSITIONS=364} [2024-06-04 16:17:48,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-04 16:17:48,365 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 364 transitions, 5250 flow [2024-06-04 16:17:48,365 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 16:17:48,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:48,365 INFO L208 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 16:17:48,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 16:17:48,366 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 16:17:48,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:48,366 INFO L85 PathProgramCache]: Analyzing trace with hash 498134191, now seen corresponding path program 2 times [2024-06-04 16:17:48,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:48,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049069613] [2024-06-04 16:17:48,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:48,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:48,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:48,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049069613] [2024-06-04 16:17:48,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049069613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:48,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:48,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:48,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252427912] [2024-06-04 16:17:48,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:48,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:48,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:48,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:48,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:48,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:48,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 364 transitions, 5250 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 16:17:48,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:48,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:48,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:50,636 INFO L124 PetriNetUnfolderBase]: 6301/10991 cut-off events. [2024-06-04 16:17:50,636 INFO L125 PetriNetUnfolderBase]: For 1079854/1079856 co-relation queries the response was YES. [2024-06-04 16:17:50,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73973 conditions, 10991 events. 6301/10991 cut-off events. For 1079854/1079856 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 87484 event pairs, 1909 based on Foata normal form. 4/10933 useless extension candidates. Maximal degree in co-relation 73836. Up to 5555 conditions per place. [2024-06-04 16:17:50,761 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 230 selfloop transitions, 176 changer transitions 0/412 dead transitions. [2024-06-04 16:17:50,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 412 transitions, 6943 flow [2024-06-04 16:17:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-04 16:17:50,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-04 16:17:50,762 INFO L175 Difference]: Start difference. First operand has 274 places, 364 transitions, 5250 flow. Second operand 9 states and 221 transitions. [2024-06-04 16:17:50,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 412 transitions, 6943 flow [2024-06-04 16:17:53,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 412 transitions, 6817 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 16:17:53,193 INFO L231 Difference]: Finished difference. Result has 279 places, 367 transitions, 5586 flow [2024-06-04 16:17:53,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5128, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5586, PETRI_PLACES=279, PETRI_TRANSITIONS=367} [2024-06-04 16:17:53,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-04 16:17:53,194 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 367 transitions, 5586 flow [2024-06-04 16:17:53,194 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 16:17:53,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:53,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:53,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 16:17:53,195 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 16:17:53,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:53,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1057008465, now seen corresponding path program 3 times [2024-06-04 16:17:53,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:53,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102809848] [2024-06-04 16:17:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:53,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:53,356 INFO 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 16:17:53,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:53,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102809848] [2024-06-04 16:17:53,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102809848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:53,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:53,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:53,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279022785] [2024-06-04 16:17:53,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:53,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:53,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:53,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:53,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:53,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:53,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 367 transitions, 5586 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 16:17:53,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:53,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:53,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:55,497 INFO L124 PetriNetUnfolderBase]: 6244/10847 cut-off events. [2024-06-04 16:17:55,497 INFO L125 PetriNetUnfolderBase]: For 1101438/1101440 co-relation queries the response was YES. [2024-06-04 16:17:55,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73242 conditions, 10847 events. 6244/10847 cut-off events. For 1101438/1101440 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 86357 event pairs, 2290 based on Foata normal form. 14/10805 useless extension candidates. Maximal degree in co-relation 73104. Up to 8684 conditions per place. [2024-06-04 16:17:55,612 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 144 changer transitions 5/414 dead transitions. [2024-06-04 16:17:55,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 414 transitions, 6892 flow [2024-06-04 16:17:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-04 16:17:55,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:17:55,613 INFO L175 Difference]: Start difference. First operand has 279 places, 367 transitions, 5586 flow. Second operand 10 states and 246 transitions. [2024-06-04 16:17:55,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 414 transitions, 6892 flow [2024-06-04 16:17:57,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 414 transitions, 6554 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:57,748 INFO L231 Difference]: Finished difference. Result has 283 places, 364 transitions, 5490 flow [2024-06-04 16:17:57,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5248, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5490, PETRI_PLACES=283, PETRI_TRANSITIONS=364} [2024-06-04 16:17:57,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-04 16:17:57,748 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 364 transitions, 5490 flow [2024-06-04 16:17:57,749 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 16:17:57,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:57,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:57,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 16:17:57,749 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 16:17:57,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1664717595, now seen corresponding path program 4 times [2024-06-04 16:17:57,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:57,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111155778] [2024-06-04 16:17:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:57,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:57,886 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 16:17:57,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:57,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111155778] [2024-06-04 16:17:57,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111155778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:57,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:57,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:57,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051863671] [2024-06-04 16:17:57,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:57,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:57,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:57,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:57,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:17:57,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 364 transitions, 5490 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 16:17:57,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:57,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:17:57,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:59,965 INFO L124 PetriNetUnfolderBase]: 6049/10559 cut-off events. [2024-06-04 16:17:59,966 INFO L125 PetriNetUnfolderBase]: For 1073989/1073991 co-relation queries the response was YES. [2024-06-04 16:18:00,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70241 conditions, 10559 events. 6049/10559 cut-off events. For 1073989/1073991 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 84018 event pairs, 2386 based on Foata normal form. 14/10563 useless extension candidates. Maximal degree in co-relation 70103. Up to 9263 conditions per place. [2024-06-04 16:18:00,076 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 132 changer transitions 2/401 dead transitions. [2024-06-04 16:18:00,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 401 transitions, 6560 flow [2024-06-04 16:18:00,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:18:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:18:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-04 16:18:00,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780487804878048 [2024-06-04 16:18:00,077 INFO L175 Difference]: Start difference. First operand has 283 places, 364 transitions, 5490 flow. Second operand 10 states and 237 transitions. [2024-06-04 16:18:00,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 401 transitions, 6560 flow [2024-06-04 16:18:02,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 401 transitions, 6257 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:02,697 INFO L231 Difference]: Finished difference. Result has 286 places, 364 transitions, 5458 flow [2024-06-04 16:18:02,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5187, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5458, PETRI_PLACES=286, PETRI_TRANSITIONS=364} [2024-06-04 16:18:02,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-04 16:18:02,697 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 364 transitions, 5458 flow [2024-06-04 16:18:02,698 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 16:18:02,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:02,698 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 16:18:02,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 16:18:02,698 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 16:18:02,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:02,698 INFO L85 PathProgramCache]: Analyzing trace with hash 147672239, now seen corresponding path program 5 times [2024-06-04 16:18:02,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:02,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236829148] [2024-06-04 16:18:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:02,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:02,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:02,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236829148] [2024-06-04 16:18:02,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236829148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:02,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:02,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:02,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470886094] [2024-06-04 16:18:02,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:02,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:02,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:02,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:02,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:02,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:18:02,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 364 transitions, 5458 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 16:18:02,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:02,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:18:02,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:04,792 INFO L124 PetriNetUnfolderBase]: 6037/10545 cut-off events. [2024-06-04 16:18:04,793 INFO L125 PetriNetUnfolderBase]: For 1047781/1047783 co-relation queries the response was YES. [2024-06-04 16:18:04,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69803 conditions, 10545 events. 6037/10545 cut-off events. For 1047781/1047783 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 83968 event pairs, 2390 based on Foata normal form. 4/10543 useless extension candidates. Maximal degree in co-relation 69664. Up to 9281 conditions per place. [2024-06-04 16:18:04,910 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 258 selfloop transitions, 127 changer transitions 0/391 dead transitions. [2024-06-04 16:18:04,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 391 transitions, 6474 flow [2024-06-04 16:18:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:18:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:18:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-04 16:18:04,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:18:04,912 INFO L175 Difference]: Start difference. First operand has 286 places, 364 transitions, 5458 flow. Second operand 9 states and 207 transitions. [2024-06-04 16:18:04,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 391 transitions, 6474 flow [2024-06-04 16:18:07,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 391 transitions, 6181 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 16:18:07,081 INFO L231 Difference]: Finished difference. Result has 287 places, 364 transitions, 5424 flow [2024-06-04 16:18:07,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5165, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5424, PETRI_PLACES=287, PETRI_TRANSITIONS=364} [2024-06-04 16:18:07,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-04 16:18:07,082 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 364 transitions, 5424 flow [2024-06-04 16:18:07,082 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 16:18:07,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:07,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:07,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 16:18:07,083 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 16:18:07,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:07,083 INFO L85 PathProgramCache]: Analyzing trace with hash 144815279, now seen corresponding path program 6 times [2024-06-04 16:18:07,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:07,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075593336] [2024-06-04 16:18:07,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:07,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:07,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:07,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075593336] [2024-06-04 16:18:07,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075593336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:07,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:07,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:07,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817552147] [2024-06-04 16:18:07,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:07,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:07,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:07,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:07,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:07,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:18:07,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 364 transitions, 5424 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 16:18:07,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:07,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:18:07,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:09,204 INFO L124 PetriNetUnfolderBase]: 6025/10488 cut-off events. [2024-06-04 16:18:09,204 INFO L125 PetriNetUnfolderBase]: For 1058074/1058076 co-relation queries the response was YES. [2024-06-04 16:18:09,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69445 conditions, 10488 events. 6025/10488 cut-off events. For 1058074/1058076 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 83081 event pairs, 2351 based on Foata normal form. 4/10465 useless extension candidates. Maximal degree in co-relation 69305. Up to 9059 conditions per place. [2024-06-04 16:18:09,318 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 137 changer transitions 1/396 dead transitions. [2024-06-04 16:18:09,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 396 transitions, 6656 flow [2024-06-04 16:18:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:18:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:18:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-04 16:18:09,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-04 16:18:09,319 INFO L175 Difference]: Start difference. First operand has 287 places, 364 transitions, 5424 flow. Second operand 9 states and 212 transitions. [2024-06-04 16:18:09,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 396 transitions, 6656 flow [2024-06-04 16:18:11,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 396 transitions, 6361 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:11,572 INFO L231 Difference]: Finished difference. Result has 289 places, 364 transitions, 5409 flow [2024-06-04 16:18:11,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5129, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5409, PETRI_PLACES=289, PETRI_TRANSITIONS=364} [2024-06-04 16:18:11,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-04 16:18:11,572 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 364 transitions, 5409 flow [2024-06-04 16:18:11,572 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 16:18:11,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:11,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:11,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 16:18:11,573 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 16:18:11,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:11,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1922762216, now seen corresponding path program 1 times [2024-06-04 16:18:11,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:11,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753016964] [2024-06-04 16:18:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:11,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:11,829 INFO 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 16:18:11,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:11,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753016964] [2024-06-04 16:18:11,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753016964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:11,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:11,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:18:11,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560275937] [2024-06-04 16:18:11,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:11,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:18:11,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:11,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:18:11,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:18:11,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:18:11,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 364 transitions, 5409 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:11,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:11,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:18:11,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:13,684 INFO L124 PetriNetUnfolderBase]: 6043/10566 cut-off events. [2024-06-04 16:18:13,684 INFO L125 PetriNetUnfolderBase]: For 1085088/1085095 co-relation queries the response was YES. [2024-06-04 16:18:13,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70152 conditions, 10566 events. 6043/10566 cut-off events. For 1085088/1085095 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 84162 event pairs, 2413 based on Foata normal form. 8/10571 useless extension candidates. Maximal degree in co-relation 70011. Up to 9288 conditions per place. [2024-06-04 16:18:13,809 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 127 changer transitions 0/399 dead transitions. [2024-06-04 16:18:13,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 399 transitions, 6789 flow [2024-06-04 16:18:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:18:13,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-04 16:18:13,819 INFO L175 Difference]: Start difference. First operand has 289 places, 364 transitions, 5409 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:18:13,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 399 transitions, 6789 flow [2024-06-04 16:18:16,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 399 transitions, 6419 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:16,377 INFO L231 Difference]: Finished difference. Result has 290 places, 373 transitions, 5465 flow [2024-06-04 16:18:16,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5057, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5465, PETRI_PLACES=290, PETRI_TRANSITIONS=373} [2024-06-04 16:18:16,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-04 16:18:16,378 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 373 transitions, 5465 flow [2024-06-04 16:18:16,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:16,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:16,379 INFO L208 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 16:18:16,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 16:18:16,379 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 16:18:16,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:16,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1380470422, now seen corresponding path program 2 times [2024-06-04 16:18:16,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:16,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217371456] [2024-06-04 16:18:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:16,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:16,513 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 16:18:16,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:16,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217371456] [2024-06-04 16:18:16,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217371456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:16,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:16,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:16,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702504666] [2024-06-04 16:18:16,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:16,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:16,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:16,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:16,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:16,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:18:16,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 373 transitions, 5465 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:16,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:16,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:18:16,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:18,443 INFO L124 PetriNetUnfolderBase]: 6053/10584 cut-off events. [2024-06-04 16:18:18,443 INFO L125 PetriNetUnfolderBase]: For 1104003/1104010 co-relation queries the response was YES. [2024-06-04 16:18:18,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70228 conditions, 10584 events. 6053/10584 cut-off events. For 1104003/1104010 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 84277 event pairs, 2413 based on Foata normal form. 8/10589 useless extension candidates. Maximal degree in co-relation 70086. Up to 9300 conditions per place. [2024-06-04 16:18:18,559 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 268 selfloop transitions, 131 changer transitions 0/405 dead transitions. [2024-06-04 16:18:18,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 405 transitions, 6807 flow [2024-06-04 16:18:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:18:18,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-04 16:18:18,560 INFO L175 Difference]: Start difference. First operand has 290 places, 373 transitions, 5465 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:18:18,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 405 transitions, 6807 flow [2024-06-04 16:18:21,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 405 transitions, 6631 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-04 16:18:21,713 INFO L231 Difference]: Finished difference. Result has 294 places, 379 transitions, 5670 flow [2024-06-04 16:18:21,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5295, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5670, PETRI_PLACES=294, PETRI_TRANSITIONS=379} [2024-06-04 16:18:21,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-04 16:18:21,713 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 379 transitions, 5670 flow [2024-06-04 16:18:21,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:21,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:21,714 INFO L208 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 16:18:21,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 16:18:21,714 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 16:18:21,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:21,714 INFO L85 PathProgramCache]: Analyzing trace with hash -239292750, now seen corresponding path program 3 times [2024-06-04 16:18:21,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:21,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800439879] [2024-06-04 16:18:21,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:21,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:21,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:21,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800439879] [2024-06-04 16:18:21,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800439879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:21,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:21,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:21,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342821361] [2024-06-04 16:18:21,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:21,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:21,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:21,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:21,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:21,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:18:21,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 379 transitions, 5670 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:21,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:21,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:18:21,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:23,957 INFO L124 PetriNetUnfolderBase]: 6050/10572 cut-off events. [2024-06-04 16:18:23,958 INFO L125 PetriNetUnfolderBase]: For 1120332/1120337 co-relation queries the response was YES. [2024-06-04 16:18:24,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70438 conditions, 10572 events. 6050/10572 cut-off events. For 1120332/1120337 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 84191 event pairs, 2420 based on Foata normal form. 3/10571 useless extension candidates. Maximal degree in co-relation 70295. Up to 9297 conditions per place. [2024-06-04 16:18:24,081 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 128 changer transitions 0/398 dead transitions. [2024-06-04 16:18:24,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 398 transitions, 6876 flow [2024-06-04 16:18:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:18:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:18:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:18:24,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-04 16:18:24,082 INFO L175 Difference]: Start difference. First operand has 294 places, 379 transitions, 5670 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:18:24,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 398 transitions, 6876 flow [2024-06-04 16:18:27,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 398 transitions, 6702 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:18:27,929 INFO L231 Difference]: Finished difference. Result has 297 places, 379 transitions, 5760 flow [2024-06-04 16:18:27,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5496, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5760, PETRI_PLACES=297, PETRI_TRANSITIONS=379} [2024-06-04 16:18:27,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-04 16:18:27,930 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 379 transitions, 5760 flow [2024-06-04 16:18:27,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:27,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:27,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:27,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 16:18:27,930 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 16:18:27,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:27,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1093225972, now seen corresponding path program 4 times [2024-06-04 16:18:27,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:27,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044172624] [2024-06-04 16:18:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:27,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:28,066 INFO 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 16:18:28,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:28,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044172624] [2024-06-04 16:18:28,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044172624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:28,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:28,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:28,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627693975] [2024-06-04 16:18:28,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:28,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:28,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:28,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:18:28,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 379 transitions, 5760 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:28,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:28,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:18:28,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:30,051 INFO L124 PetriNetUnfolderBase]: 6055/10585 cut-off events. [2024-06-04 16:18:30,052 INFO L125 PetriNetUnfolderBase]: For 1141311/1141316 co-relation queries the response was YES. [2024-06-04 16:18:30,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70865 conditions, 10585 events. 6055/10585 cut-off events. For 1141311/1141316 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 84337 event pairs, 2424 based on Foata normal form. 3/10584 useless extension candidates. Maximal degree in co-relation 70721. Up to 9303 conditions per place. [2024-06-04 16:18:30,162 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 136 changer transitions 0/398 dead transitions. [2024-06-04 16:18:30,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 398 transitions, 7022 flow [2024-06-04 16:18:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:18:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:18:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 16:18:30,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:18:30,164 INFO L175 Difference]: Start difference. First operand has 297 places, 379 transitions, 5760 flow. Second operand 7 states and 161 transitions. [2024-06-04 16:18:30,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 398 transitions, 7022 flow [2024-06-04 16:18:33,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 398 transitions, 6623 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:33,634 INFO L231 Difference]: Finished difference. Result has 297 places, 382 transitions, 5701 flow [2024-06-04 16:18:33,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5376, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5701, PETRI_PLACES=297, PETRI_TRANSITIONS=382} [2024-06-04 16:18:33,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-04 16:18:33,635 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 382 transitions, 5701 flow [2024-06-04 16:18:33,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:33,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:33,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:33,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 16:18:33,636 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 16:18:33,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:33,636 INFO L85 PathProgramCache]: Analyzing trace with hash -239281590, now seen corresponding path program 5 times [2024-06-04 16:18:33,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:33,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145223358] [2024-06-04 16:18:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:33,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:33,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:33,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145223358] [2024-06-04 16:18:33,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145223358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:33,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:33,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:33,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385207830] [2024-06-04 16:18:33,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:33,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:33,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:33,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:33,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:33,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:18:33,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 382 transitions, 5701 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:33,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:33,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:18:33,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:35,742 INFO L124 PetriNetUnfolderBase]: 6052/10581 cut-off events. [2024-06-04 16:18:35,742 INFO L125 PetriNetUnfolderBase]: For 1158356/1158361 co-relation queries the response was YES. [2024-06-04 16:18:35,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70797 conditions, 10581 events. 6052/10581 cut-off events. For 1158356/1158361 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 84328 event pairs, 2424 based on Foata normal form. 3/10580 useless extension candidates. Maximal degree in co-relation 70652. Up to 9300 conditions per place. [2024-06-04 16:18:35,866 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 259 selfloop transitions, 132 changer transitions 0/397 dead transitions. [2024-06-04 16:18:35,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 397 transitions, 6711 flow [2024-06-04 16:18:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:18:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:18:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 16:18:35,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-04 16:18:35,867 INFO L175 Difference]: Start difference. First operand has 297 places, 382 transitions, 5701 flow. Second operand 7 states and 159 transitions. [2024-06-04 16:18:35,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 397 transitions, 6711 flow [2024-06-04 16:18:39,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 397 transitions, 6534 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:18:39,006 INFO L231 Difference]: Finished difference. Result has 301 places, 382 transitions, 5795 flow [2024-06-04 16:18:39,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5524, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5795, PETRI_PLACES=301, PETRI_TRANSITIONS=382} [2024-06-04 16:18:39,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-04 16:18:39,006 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 382 transitions, 5795 flow [2024-06-04 16:18:39,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:39,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:39,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:39,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 16:18:39,007 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 16:18:39,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash -239114190, now seen corresponding path program 6 times [2024-06-04 16:18:39,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:39,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279694028] [2024-06-04 16:18:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:39,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:39,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:39,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279694028] [2024-06-04 16:18:39,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279694028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:39,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:39,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:39,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808544756] [2024-06-04 16:18:39,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:39,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:39,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:39,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:39,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:18:39,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 382 transitions, 5795 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:39,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:39,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:18:39,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand