./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe033_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/safe033_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/safe033_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe033_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 16:15:32,993 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:15:33,054 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:15:33,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:15:33,059 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:15:33,081 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:15:33,081 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:15:33,081 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:15:33,082 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:15:33,084 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:15:33,085 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:15:33,085 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:15:33,085 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:15:33,086 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:15:33,086 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:15:33,087 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:15:33,087 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:15:33,087 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:15:33,087 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:15:33,087 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:15:33,087 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:15:33,087 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:15:33,088 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:15:33,088 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:15:33,088 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:15:33,088 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:15:33,088 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:15:33,088 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:15:33,089 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:15:33,089 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:15:33,089 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:15:33,090 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:15:33,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:15:33,090 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:15:33,090 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:15:33,090 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:15:33,090 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:15:33,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:15:33,090 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:15:33,090 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:15:33,090 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:15:33,091 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:15:33,091 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:15:33,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:15:33,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:15:33,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:15:33,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:15:33,284 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:15:33,284 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:15:33,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe033_tso.i [2024-06-04 16:15:34,271 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:15:34,495 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:15:34,496 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe033_tso.i [2024-06-04 16:15:34,509 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d11166033/28b4f81bee7042c38ff5f34dd7351085/FLAGb3dea39b7 [2024-06-04 16:15:34,522 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d11166033/28b4f81bee7042c38ff5f34dd7351085 [2024-06-04 16:15:34,524 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:15:34,524 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:15:34,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe033_tso.yml/witness.yml [2024-06-04 16:15:34,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:15:34,616 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:15:34,617 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:15:34,617 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:15:34,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:15:34,622 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:15:34" (1/2) ... [2024-06-04 16:15:34,622 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c70891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:34, skipping insertion in model container [2024-06-04 16:15:34,623 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:15:34" (1/2) ... [2024-06-04 16:15:34,626 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@13b5ccb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:34, skipping insertion in model container [2024-06-04 16:15:34,626 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:15:34" (2/2) ... [2024-06-04 16:15:34,626 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c70891 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:34, skipping insertion in model container [2024-06-04 16:15:34,627 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:15:34" (2/2) ... [2024-06-04 16:15:34,627 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:15:34,655 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:15:34,656 INFO L97 edCorrectnessWitness]: Location invariant before [L764-L764] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-04 16:15:34,657 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-04 16:15:34,657 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:15:34,657 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-04 16:15:34,696 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:15:34,941 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:15:34,952 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:15:35,048 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:15:35,075 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:15:35,075 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:35 WrapperNode [2024-06-04 16:15:35,075 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:15:35,076 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:15:35,076 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:15:35,076 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:15:35,082 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 04:15:35" (1/1) ... [2024-06-04 16:15:35,090 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 04:15:35" (1/1) ... [2024-06-04 16:15:35,110 INFO L138 Inliner]: procedures = 174, calls = 35, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 56 [2024-06-04 16:15:35,110 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:15:35,111 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:15:35,111 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:15:35,111 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:15:35,118 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 04:15:35" (1/1) ... [2024-06-04 16:15:35,118 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 04:15:35" (1/1) ... [2024-06-04 16:15:35,121 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 04:15:35" (1/1) ... [2024-06-04 16:15:35,131 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 16:15:35,131 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 04:15:35" (1/1) ... [2024-06-04 16:15:35,131 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 04:15:35" (1/1) ... [2024-06-04 16:15:35,135 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 04:15:35" (1/1) ... [2024-06-04 16:15:35,136 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 04:15:35" (1/1) ... [2024-06-04 16:15:35,138 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 04:15:35" (1/1) ... [2024-06-04 16:15:35,138 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 04:15:35" (1/1) ... [2024-06-04 16:15:35,140 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:15:35,141 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:15:35,141 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:15:35,141 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:15:35,142 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 04:15:35" (1/1) ... [2024-06-04 16:15:35,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:15:35,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:15:35,163 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 16:15:35,170 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 16:15:35,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:15:35,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:15:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:15:35,198 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:15:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:15:35,198 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:15:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:15:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:15:35,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:15:35,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:15:35,200 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 16:15:35,336 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:15:35,337 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:15:35,559 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:15:35,560 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:15:35,617 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:15:35,619 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:15:35,621 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:15:35 BoogieIcfgContainer [2024-06-04 16:15:35,622 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:15:35,624 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:15:35,624 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:15:35,626 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:15:35,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:15:34" (1/4) ... [2024-06-04 16:15:35,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36604bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:15:35, skipping insertion in model container [2024-06-04 16:15:35,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:15:34" (2/4) ... [2024-06-04 16:15:35,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36604bc1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:15:35, skipping insertion in model container [2024-06-04 16:15:35,629 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 04:15:35" (3/4) ... [2024-06-04 16:15:35,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36604bc1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:15:35, skipping insertion in model container [2024-06-04 16:15:35,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:15:35" (4/4) ... [2024-06-04 16:15:35,630 INFO L112 eAbstractionObserver]: Analyzing ICFG safe033_tso.i [2024-06-04 16:15:35,643 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:15:35,643 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-04 16:15:35,643 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:15:35,693 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:15:35,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-04 16:15:35,749 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-04 16:15:35,750 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:15:35,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 16:15:35,751 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-04 16:15:35,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-04 16:15:35,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:15:35,785 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;@1a65d540, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:15:35,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-04 16:15:35,804 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:15:35,804 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-04 16:15:35,804 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:15:35,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:35,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:15:35,805 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:35,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:35,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1558193034, now seen corresponding path program 1 times [2024-06-04 16:15:35,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:35,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792192706] [2024-06-04 16:15:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:35,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:36,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:36,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792192706] [2024-06-04 16:15:36,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792192706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:36,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:36,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:15:36,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924437013] [2024-06-04 16:15:36,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:36,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:15:36,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:36,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:15:36,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:15:36,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 31 [2024-06-04 16:15:36,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:36,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:36,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 31 [2024-06-04 16:15:36,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:36,397 INFO L124 PetriNetUnfolderBase]: 83/183 cut-off events. [2024-06-04 16:15:36,397 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-04 16:15:36,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 183 events. 83/183 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 709 event pairs, 43 based on Foata normal form. 1/172 useless extension candidates. Maximal degree in co-relation 343. Up to 153 conditions per place. [2024-06-04 16:15:36,402 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 20 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-04 16:15:36,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 113 flow [2024-06-04 16:15:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:15:36,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:15:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-06-04 16:15:36,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559139784946236 [2024-06-04 16:15:36,413 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 61 transitions. [2024-06-04 16:15:36,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 113 flow [2024-06-04 16:15:36,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:36,417 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-04 16:15:36,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-04 16:15:36,422 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-04 16:15:36,422 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-04 16:15:36,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:36,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:36,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:36,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:15:36,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:36,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:36,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1519960829, now seen corresponding path program 1 times [2024-06-04 16:15:36,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:36,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207783026] [2024-06-04 16:15:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:36,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:36,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207783026] [2024-06-04 16:15:36,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207783026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:36,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:36,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:15:36,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006779644] [2024-06-04 16:15:36,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:36,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:15:36,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:15:36,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:15:36,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 31 [2024-06-04 16:15:36,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:36,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:36,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 31 [2024-06-04 16:15:36,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:36,695 INFO L124 PetriNetUnfolderBase]: 80/178 cut-off events. [2024-06-04 16:15:36,696 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-06-04 16:15:36,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 178 events. 80/178 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 680 event pairs, 34 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 387. Up to 139 conditions per place. [2024-06-04 16:15:36,698 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 24 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-04 16:15:36,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 155 flow [2024-06-04 16:15:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-06-04 16:15:36,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370967741935484 [2024-06-04 16:15:36,702 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 79 transitions. [2024-06-04 16:15:36,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 155 flow [2024-06-04 16:15:36,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:15:36,706 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-04 16:15:36,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-04 16:15:36,707 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-04 16:15:36,707 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-04 16:15:36,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:36,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:36,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:36,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:15:36,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:36,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:36,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1618377718, now seen corresponding path program 1 times [2024-06-04 16:15:36,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:36,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581799509] [2024-06-04 16:15:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:36,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:36,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:36,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581799509] [2024-06-04 16:15:36,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581799509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:36,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:36,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:15:36,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695595138] [2024-06-04 16:15:36,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:36,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:15:36,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:36,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:15:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:15:37,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:37,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:37,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:37,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:37,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:37,068 INFO L124 PetriNetUnfolderBase]: 101/210 cut-off events. [2024-06-04 16:15:37,069 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-06-04 16:15:37,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 210 events. 101/210 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 779 event pairs, 48 based on Foata normal form. 1/209 useless extension candidates. Maximal degree in co-relation 521. Up to 182 conditions per place. [2024-06-04 16:15:37,073 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 24 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2024-06-04 16:15:37,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 171 flow [2024-06-04 16:15:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:37,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:37,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-06-04 16:15:37,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-04 16:15:37,077 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 4 states and 72 transitions. [2024-06-04 16:15:37,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 171 flow [2024-06-04 16:15:37,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 162 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:37,080 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 111 flow [2024-06-04 16:15:37,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-06-04 16:15:37,081 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-06-04 16:15:37,081 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 111 flow [2024-06-04 16:15:37,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:37,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:37,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:37,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:15:37,082 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:37,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:37,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1589661287, now seen corresponding path program 1 times [2024-06-04 16:15:37,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:37,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54122430] [2024-06-04 16:15:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:37,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:37,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:37,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54122430] [2024-06-04 16:15:37,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54122430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:37,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:37,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:37,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291504070] [2024-06-04 16:15:37,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:37,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:37,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:37,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:37,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:37,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 111 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:37,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:37,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:37,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:37,354 INFO L124 PetriNetUnfolderBase]: 97/206 cut-off events. [2024-06-04 16:15:37,355 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-06-04 16:15:37,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 206 events. 97/206 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 747 event pairs, 14 based on Foata normal form. 4/208 useless extension candidates. Maximal degree in co-relation 537. Up to 141 conditions per place. [2024-06-04 16:15:37,356 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 31 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-04 16:15:37,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 44 transitions, 223 flow [2024-06-04 16:15:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:37,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 16:15:37,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-06-04 16:15:37,360 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 111 flow. Second operand 6 states and 105 transitions. [2024-06-04 16:15:37,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 44 transitions, 223 flow [2024-06-04 16:15:37,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 214 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:37,363 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 127 flow [2024-06-04 16:15:37,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2024-06-04 16:15:37,364 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-04 16:15:37,365 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 127 flow [2024-06-04 16:15:37,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:37,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:37,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:37,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:15:37,366 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:37,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:37,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1369897695, now seen corresponding path program 1 times [2024-06-04 16:15:37,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:37,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170830163] [2024-06-04 16:15:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:37,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:37,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:37,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170830163] [2024-06-04 16:15:37,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170830163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:37,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:37,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:37,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952925771] [2024-06-04 16:15:37,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:37,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:37,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:37,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:37,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:37,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:37,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:37,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:37,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:37,631 INFO L124 PetriNetUnfolderBase]: 99/213 cut-off events. [2024-06-04 16:15:37,631 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2024-06-04 16:15:37,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 213 events. 99/213 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 793 event pairs, 22 based on Foata normal form. 2/213 useless extension candidates. Maximal degree in co-relation 601. Up to 152 conditions per place. [2024-06-04 16:15:37,632 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 30 selfloop transitions, 13 changer transitions 0/48 dead transitions. [2024-06-04 16:15:37,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 271 flow [2024-06-04 16:15:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 16:15:37,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-06-04 16:15:37,634 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 127 flow. Second operand 7 states and 119 transitions. [2024-06-04 16:15:37,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 271 flow [2024-06-04 16:15:37,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 48 transitions, 255 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:37,635 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 180 flow [2024-06-04 16:15:37,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2024-06-04 16:15:37,636 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-06-04 16:15:37,636 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 180 flow [2024-06-04 16:15:37,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:37,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:37,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:37,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:15:37,637 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:37,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:37,637 INFO L85 PathProgramCache]: Analyzing trace with hash 482598967, now seen corresponding path program 1 times [2024-06-04 16:15:37,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:37,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943190971] [2024-06-04 16:15:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:37,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:37,783 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 16:15:37,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:37,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943190971] [2024-06-04 16:15:37,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943190971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:37,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:37,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:37,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470057410] [2024-06-04 16:15:37,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:37,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:37,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:37,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:37,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:37,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:37,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:37,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:37,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:37,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:37,857 INFO L124 PetriNetUnfolderBase]: 102/220 cut-off events. [2024-06-04 16:15:37,857 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2024-06-04 16:15:37,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 220 events. 102/220 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 824 event pairs, 24 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 712. Up to 154 conditions per place. [2024-06-04 16:15:37,859 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 30 selfloop transitions, 14 changer transitions 0/49 dead transitions. [2024-06-04 16:15:37,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 319 flow [2024-06-04 16:15:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-04 16:15:37,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5752688172043011 [2024-06-04 16:15:37,860 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 180 flow. Second operand 6 states and 107 transitions. [2024-06-04 16:15:37,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 319 flow [2024-06-04 16:15:37,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 295 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:37,862 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 204 flow [2024-06-04 16:15:37,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-06-04 16:15:37,863 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-04 16:15:37,863 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 204 flow [2024-06-04 16:15:37,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:37,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:37,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:37,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:15:37,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:37,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:37,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1055717047, now seen corresponding path program 2 times [2024-06-04 16:15:37,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:37,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990580949] [2024-06-04 16:15:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:37,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:38,002 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 16:15:38,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:38,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990580949] [2024-06-04 16:15:38,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990580949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:38,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:38,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:38,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490370330] [2024-06-04 16:15:38,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:38,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:38,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:38,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:38,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:38,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:38,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:38,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:38,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:38,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:38,101 INFO L124 PetriNetUnfolderBase]: 97/211 cut-off events. [2024-06-04 16:15:38,101 INFO L125 PetriNetUnfolderBase]: For 476/476 co-relation queries the response was YES. [2024-06-04 16:15:38,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 211 events. 97/211 cut-off events. For 476/476 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 776 event pairs, 23 based on Foata normal form. 2/211 useless extension candidates. Maximal degree in co-relation 693. Up to 149 conditions per place. [2024-06-04 16:15:38,103 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 30 selfloop transitions, 14 changer transitions 0/49 dead transitions. [2024-06-04 16:15:38,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 318 flow [2024-06-04 16:15:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 16:15:38,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-06-04 16:15:38,104 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 204 flow. Second operand 7 states and 119 transitions. [2024-06-04 16:15:38,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 318 flow [2024-06-04 16:15:38,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 297 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:38,107 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 218 flow [2024-06-04 16:15:38,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=218, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2024-06-04 16:15:38,107 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2024-06-04 16:15:38,107 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 218 flow [2024-06-04 16:15:38,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:38,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:38,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:38,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:15:38,108 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:38,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:38,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2083295168, now seen corresponding path program 1 times [2024-06-04 16:15:38,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:38,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634225537] [2024-06-04 16:15:38,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:38,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:38,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:38,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634225537] [2024-06-04 16:15:38,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634225537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:38,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:38,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:38,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842070027] [2024-06-04 16:15:38,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:38,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:38,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:38,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:38,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:38,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:38,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 218 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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 16:15:38,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:38,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:38,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:38,378 INFO L124 PetriNetUnfolderBase]: 98/214 cut-off events. [2024-06-04 16:15:38,378 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2024-06-04 16:15:38,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 214 events. 98/214 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 787 event pairs, 22 based on Foata normal form. 4/216 useless extension candidates. Maximal degree in co-relation 714. Up to 140 conditions per place. [2024-06-04 16:15:38,379 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 30 selfloop transitions, 17 changer transitions 0/52 dead transitions. [2024-06-04 16:15:38,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 346 flow [2024-06-04 16:15:38,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 16:15:38,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-06-04 16:15:38,381 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 218 flow. Second operand 8 states and 132 transitions. [2024-06-04 16:15:38,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 346 flow [2024-06-04 16:15:38,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 307 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:38,383 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 224 flow [2024-06-04 16:15:38,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=224, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2024-06-04 16:15:38,384 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2024-06-04 16:15:38,384 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 224 flow [2024-06-04 16:15:38,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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 16:15:38,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:38,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:38,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:15:38,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:38,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1962414250, now seen corresponding path program 1 times [2024-06-04 16:15:38,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:38,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253135270] [2024-06-04 16:15:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:38,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:38,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:38,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253135270] [2024-06-04 16:15:38,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253135270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:38,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:38,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:38,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534652583] [2024-06-04 16:15:38,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:38,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:38,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:38,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:38,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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 16:15:38,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:38,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:38,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:38,648 INFO L124 PetriNetUnfolderBase]: 101/221 cut-off events. [2024-06-04 16:15:38,648 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-06-04 16:15:38,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 221 events. 101/221 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 821 event pairs, 21 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 759. Up to 165 conditions per place. [2024-06-04 16:15:38,649 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 40 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2024-06-04 16:15:38,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 364 flow [2024-06-04 16:15:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 16:15:38,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2024-06-04 16:15:38,651 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 224 flow. Second operand 6 states and 105 transitions. [2024-06-04 16:15:38,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 364 flow [2024-06-04 16:15:38,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 325 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:38,653 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 222 flow [2024-06-04 16:15:38,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2024-06-04 16:15:38,654 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2024-06-04 16:15:38,654 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 222 flow [2024-06-04 16:15:38,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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 16:15:38,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:38,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:38,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:15:38,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:38,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1108162488, now seen corresponding path program 2 times [2024-06-04 16:15:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:38,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956795165] [2024-06-04 16:15:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:38,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:38,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956795165] [2024-06-04 16:15:38,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956795165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:38,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:38,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:38,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879498849] [2024-06-04 16:15:38,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:38,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:38,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:38,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:38,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:38,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:38,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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 16:15:38,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:38,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:38,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:38,903 INFO L124 PetriNetUnfolderBase]: 109/238 cut-off events. [2024-06-04 16:15:38,904 INFO L125 PetriNetUnfolderBase]: For 839/839 co-relation queries the response was YES. [2024-06-04 16:15:38,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 238 events. 109/238 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 925 event pairs, 20 based on Foata normal form. 1/237 useless extension candidates. Maximal degree in co-relation 823. Up to 136 conditions per place. [2024-06-04 16:15:38,905 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 22 changer transitions 0/61 dead transitions. [2024-06-04 16:15:38,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 442 flow [2024-06-04 16:15:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:38,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:38,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-04 16:15:38,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576036866359447 [2024-06-04 16:15:38,909 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 222 flow. Second operand 7 states and 125 transitions. [2024-06-04 16:15:38,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 442 flow [2024-06-04 16:15:38,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 421 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:38,912 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 298 flow [2024-06-04 16:15:38,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=298, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-04 16:15:38,915 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-06-04 16:15:38,917 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 298 flow [2024-06-04 16:15:38,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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 16:15:38,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:38,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:38,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:15:38,918 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:38,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:38,919 INFO L85 PathProgramCache]: Analyzing trace with hash 931812566, now seen corresponding path program 3 times [2024-06-04 16:15:38,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:38,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405093140] [2024-06-04 16:15:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:38,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:39,100 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 16:15:39,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:39,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405093140] [2024-06-04 16:15:39,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405093140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:39,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:39,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:39,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909695319] [2024-06-04 16:15:39,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:39,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:39,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:39,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:39,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 298 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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 16:15:39,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:39,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:39,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:39,200 INFO L124 PetriNetUnfolderBase]: 105/232 cut-off events. [2024-06-04 16:15:39,200 INFO L125 PetriNetUnfolderBase]: For 1021/1021 co-relation queries the response was YES. [2024-06-04 16:15:39,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 232 events. 105/232 cut-off events. For 1021/1021 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 892 event pairs, 19 based on Foata normal form. 2/232 useless extension candidates. Maximal degree in co-relation 845. Up to 133 conditions per place. [2024-06-04 16:15:39,202 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 36 selfloop transitions, 20 changer transitions 0/61 dead transitions. [2024-06-04 16:15:39,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 460 flow [2024-06-04 16:15:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 16:15:39,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524193548387096 [2024-06-04 16:15:39,205 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 298 flow. Second operand 8 states and 137 transitions. [2024-06-04 16:15:39,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 460 flow [2024-06-04 16:15:39,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 432 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:39,210 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 316 flow [2024-06-04 16:15:39,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=316, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2024-06-04 16:15:39,211 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2024-06-04 16:15:39,211 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 316 flow [2024-06-04 16:15:39,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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 16:15:39,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:39,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:39,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:15:39,212 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:39,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:39,212 INFO L85 PathProgramCache]: Analyzing trace with hash -440659065, now seen corresponding path program 1 times [2024-06-04 16:15:39,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:39,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109046205] [2024-06-04 16:15:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:39,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:39,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:39,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109046205] [2024-06-04 16:15:39,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109046205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:39,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:39,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:39,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788646754] [2024-06-04 16:15:39,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:39,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:39,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:39,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:39,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:39,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:39,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 316 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:39,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:39,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:39,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:39,469 INFO L124 PetriNetUnfolderBase]: 108/241 cut-off events. [2024-06-04 16:15:39,470 INFO L125 PetriNetUnfolderBase]: For 1177/1177 co-relation queries the response was YES. [2024-06-04 16:15:39,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 241 events. 108/241 cut-off events. For 1177/1177 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 952 event pairs, 20 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 918. Up to 154 conditions per place. [2024-06-04 16:15:39,471 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 36 selfloop transitions, 19 changer transitions 0/60 dead transitions. [2024-06-04 16:15:39,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 468 flow [2024-06-04 16:15:39,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-04 16:15:39,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-04 16:15:39,473 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 316 flow. Second operand 6 states and 108 transitions. [2024-06-04 16:15:39,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 468 flow [2024-06-04 16:15:39,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 403 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:39,477 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 322 flow [2024-06-04 16:15:39,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-06-04 16:15:39,478 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2024-06-04 16:15:39,478 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 322 flow [2024-06-04 16:15:39,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:39,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:39,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:39,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:15:39,479 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:39,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:39,480 INFO L85 PathProgramCache]: Analyzing trace with hash -843677427, now seen corresponding path program 2 times [2024-06-04 16:15:39,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:39,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338887828] [2024-06-04 16:15:39,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:39,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:39,621 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 16:15:39,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:39,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338887828] [2024-06-04 16:15:39,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338887828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:39,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:39,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:39,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823912423] [2024-06-04 16:15:39,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:39,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:39,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:39,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:39,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:39,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 322 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:39,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:39,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:39,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:39,721 INFO L124 PetriNetUnfolderBase]: 111/246 cut-off events. [2024-06-04 16:15:39,721 INFO L125 PetriNetUnfolderBase]: For 1272/1272 co-relation queries the response was YES. [2024-06-04 16:15:39,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 246 events. 111/246 cut-off events. For 1272/1272 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 985 event pairs, 20 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 938. Up to 141 conditions per place. [2024-06-04 16:15:39,723 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 33 selfloop transitions, 27 changer transitions 0/65 dead transitions. [2024-06-04 16:15:39,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 514 flow [2024-06-04 16:15:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 16:15:39,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-06-04 16:15:39,724 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 322 flow. Second operand 8 states and 136 transitions. [2024-06-04 16:15:39,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 514 flow [2024-06-04 16:15:39,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 65 transitions, 471 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:39,728 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 358 flow [2024-06-04 16:15:39,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=358, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2024-06-04 16:15:39,729 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-06-04 16:15:39,729 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 358 flow [2024-06-04 16:15:39,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:39,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:39,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:39,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:15:39,730 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:39,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:39,730 INFO L85 PathProgramCache]: Analyzing trace with hash -843683007, now seen corresponding path program 3 times [2024-06-04 16:15:39,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:39,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519252988] [2024-06-04 16:15:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:39,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:39,861 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 16:15:39,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:39,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519252988] [2024-06-04 16:15:39,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519252988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:39,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:39,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:39,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651888602] [2024-06-04 16:15:39,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:39,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:39,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:39,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:39,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:39,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:39,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 358 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:39,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:39,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:39,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:39,943 INFO L124 PetriNetUnfolderBase]: 109/243 cut-off events. [2024-06-04 16:15:39,943 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2024-06-04 16:15:39,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 243 events. 109/243 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 970 event pairs, 20 based on Foata normal form. 1/242 useless extension candidates. Maximal degree in co-relation 929. Up to 139 conditions per place. [2024-06-04 16:15:39,945 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 25 changer transitions 0/64 dead transitions. [2024-06-04 16:15:39,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 504 flow [2024-06-04 16:15:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 16:15:39,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443548387096774 [2024-06-04 16:15:39,946 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 358 flow. Second operand 8 states and 135 transitions. [2024-06-04 16:15:39,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 504 flow [2024-06-04 16:15:39,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 438 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:39,950 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 348 flow [2024-06-04 16:15:39,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=348, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-06-04 16:15:39,951 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-06-04 16:15:39,951 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 348 flow [2024-06-04 16:15:39,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:39,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:39,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:39,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:15:39,952 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:39,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:39,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1694238871, now seen corresponding path program 1 times [2024-06-04 16:15:39,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:39,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580832854] [2024-06-04 16:15:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:39,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:40,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:40,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580832854] [2024-06-04 16:15:40,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580832854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:40,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:40,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:40,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680950908] [2024-06-04 16:15:40,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:40,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:40,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:40,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:40,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:40,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:40,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 348 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:40,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:40,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:40,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:40,219 INFO L124 PetriNetUnfolderBase]: 113/253 cut-off events. [2024-06-04 16:15:40,219 INFO L125 PetriNetUnfolderBase]: For 1496/1496 co-relation queries the response was YES. [2024-06-04 16:15:40,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 253 events. 113/253 cut-off events. For 1496/1496 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1032 event pairs, 22 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 957. Up to 173 conditions per place. [2024-06-04 16:15:40,221 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 46 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2024-06-04 16:15:40,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 506 flow [2024-06-04 16:15:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:40,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 16:15:40,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362903225806451 [2024-06-04 16:15:40,222 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 348 flow. Second operand 8 states and 133 transitions. [2024-06-04 16:15:40,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 506 flow [2024-06-04 16:15:40,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 441 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:40,226 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 325 flow [2024-06-04 16:15:40,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2024-06-04 16:15:40,226 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-04 16:15:40,226 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 325 flow [2024-06-04 16:15:40,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:40,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:40,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:40,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:15:40,226 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:40,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:40,227 INFO L85 PathProgramCache]: Analyzing trace with hash 582652353, now seen corresponding path program 2 times [2024-06-04 16:15:40,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:40,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308719677] [2024-06-04 16:15:40,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:40,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:40,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:40,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308719677] [2024-06-04 16:15:40,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308719677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:40,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:40,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:40,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867543526] [2024-06-04 16:15:40,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:40,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:40,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:40,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:40,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:40,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:40,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 325 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:40,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:40,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:40,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:40,453 INFO L124 PetriNetUnfolderBase]: 110/250 cut-off events. [2024-06-04 16:15:40,453 INFO L125 PetriNetUnfolderBase]: For 1413/1413 co-relation queries the response was YES. [2024-06-04 16:15:40,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 250 events. 110/250 cut-off events. For 1413/1413 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1009 event pairs, 19 based on Foata normal form. 2/250 useless extension candidates. Maximal degree in co-relation 903. Up to 148 conditions per place. [2024-06-04 16:15:40,454 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 46 selfloop transitions, 16 changer transitions 0/67 dead transitions. [2024-06-04 16:15:40,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 67 transitions, 481 flow [2024-06-04 16:15:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:40,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 16:15:40,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282258064516129 [2024-06-04 16:15:40,455 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 325 flow. Second operand 8 states and 131 transitions. [2024-06-04 16:15:40,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 67 transitions, 481 flow [2024-06-04 16:15:40,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 67 transitions, 449 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:40,459 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 329 flow [2024-06-04 16:15:40,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=329, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2024-06-04 16:15:40,459 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-04 16:15:40,459 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 329 flow [2024-06-04 16:15:40,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:40,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:40,460 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 16:15:40,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:15:40,460 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:40,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash -76034585, now seen corresponding path program 1 times [2024-06-04 16:15:40,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:40,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135208768] [2024-06-04 16:15:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:40,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:40,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:40,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135208768] [2024-06-04 16:15:40,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135208768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:40,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:40,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:40,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757529775] [2024-06-04 16:15:40,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:40,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:40,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:40,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:40,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:40,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:40,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 329 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:40,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:40,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:40,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:40,723 INFO L124 PetriNetUnfolderBase]: 121/271 cut-off events. [2024-06-04 16:15:40,723 INFO L125 PetriNetUnfolderBase]: For 1881/1881 co-relation queries the response was YES. [2024-06-04 16:15:40,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1053 conditions, 271 events. 121/271 cut-off events. For 1881/1881 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1127 event pairs, 9 based on Foata normal form. 2/271 useless extension candidates. Maximal degree in co-relation 1021. Up to 168 conditions per place. [2024-06-04 16:15:40,725 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 56 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2024-06-04 16:15:40,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 73 transitions, 553 flow [2024-06-04 16:15:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 16:15:40,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-06-04 16:15:40,726 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 329 flow. Second operand 8 states and 134 transitions. [2024-06-04 16:15:40,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 73 transitions, 553 flow [2024-06-04 16:15:40,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 517 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:40,731 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 339 flow [2024-06-04 16:15:40,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=339, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2024-06-04 16:15:40,731 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-06-04 16:15:40,731 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 339 flow [2024-06-04 16:15:40,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:40,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:40,731 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 16:15:40,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:15:40,732 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:40,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:40,732 INFO L85 PathProgramCache]: Analyzing trace with hash -499664941, now seen corresponding path program 2 times [2024-06-04 16:15:40,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:40,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080813735] [2024-06-04 16:15:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:40,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:40,881 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 16:15:40,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:40,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080813735] [2024-06-04 16:15:40,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080813735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:40,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:40,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:40,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736915188] [2024-06-04 16:15:40,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:40,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:40,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:40,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:40,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:40,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 339 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:40,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:40,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:40,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:41,001 INFO L124 PetriNetUnfolderBase]: 118/266 cut-off events. [2024-06-04 16:15:41,002 INFO L125 PetriNetUnfolderBase]: For 1793/1793 co-relation queries the response was YES. [2024-06-04 16:15:41,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 266 events. 118/266 cut-off events. For 1793/1793 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1096 event pairs, 19 based on Foata normal form. 2/266 useless extension candidates. Maximal degree in co-relation 976. Up to 192 conditions per place. [2024-06-04 16:15:41,004 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 55 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2024-06-04 16:15:41,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 505 flow [2024-06-04 16:15:41,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 16:15:41,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-06-04 16:15:41,005 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 339 flow. Second operand 7 states and 119 transitions. [2024-06-04 16:15:41,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 505 flow [2024-06-04 16:15:41,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 70 transitions, 479 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:41,011 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 337 flow [2024-06-04 16:15:41,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=337, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2024-06-04 16:15:41,012 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-04 16:15:41,012 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 337 flow [2024-06-04 16:15:41,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:41,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:41,012 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 16:15:41,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:15:41,012 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:41,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:41,013 INFO L85 PathProgramCache]: Analyzing trace with hash -218734637, now seen corresponding path program 3 times [2024-06-04 16:15:41,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:41,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535606691] [2024-06-04 16:15:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:41,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:41,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:41,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535606691] [2024-06-04 16:15:41,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535606691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:41,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:41,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:41,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681963241] [2024-06-04 16:15:41,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:41,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:41,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:41,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:41,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:41,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:41,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 337 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:41,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:41,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:41,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:41,272 INFO L124 PetriNetUnfolderBase]: 122/274 cut-off events. [2024-06-04 16:15:41,273 INFO L125 PetriNetUnfolderBase]: For 2049/2049 co-relation queries the response was YES. [2024-06-04 16:15:41,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 274 events. 122/274 cut-off events. For 2049/2049 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1142 event pairs, 20 based on Foata normal form. 2/274 useless extension candidates. Maximal degree in co-relation 1009. Up to 160 conditions per place. [2024-06-04 16:15:41,274 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 37 selfloop transitions, 27 changer transitions 0/69 dead transitions. [2024-06-04 16:15:41,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 69 transitions, 505 flow [2024-06-04 16:15:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 16:15:41,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524193548387096 [2024-06-04 16:15:41,277 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 337 flow. Second operand 8 states and 137 transitions. [2024-06-04 16:15:41,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 69 transitions, 505 flow [2024-06-04 16:15:41,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 69 transitions, 483 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:41,287 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 385 flow [2024-06-04 16:15:41,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=385, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2024-06-04 16:15:41,287 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-04 16:15:41,287 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 385 flow [2024-06-04 16:15:41,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:41,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:41,288 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 16:15:41,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:15:41,288 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:41,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:41,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2118692597, now seen corresponding path program 4 times [2024-06-04 16:15:41,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:41,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006295628] [2024-06-04 16:15:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:41,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:41,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:41,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006295628] [2024-06-04 16:15:41,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006295628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:41,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:41,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:41,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917949890] [2024-06-04 16:15:41,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:41,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:41,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:41,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:41,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:41,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 56 transitions, 385 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:41,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:41,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:41,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:41,549 INFO L124 PetriNetUnfolderBase]: 131/297 cut-off events. [2024-06-04 16:15:41,549 INFO L125 PetriNetUnfolderBase]: For 3345/3345 co-relation queries the response was YES. [2024-06-04 16:15:41,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1111 conditions, 297 events. 131/297 cut-off events. For 3345/3345 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1288 event pairs, 22 based on Foata normal form. 10/305 useless extension candidates. Maximal degree in co-relation 1075. Up to 151 conditions per place. [2024-06-04 16:15:41,551 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 40 selfloop transitions, 24 changer transitions 4/73 dead transitions. [2024-06-04 16:15:41,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 73 transitions, 567 flow [2024-06-04 16:15:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 16:15:41,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-06-04 16:15:41,552 INFO L175 Difference]: Start difference. First operand has 74 places, 56 transitions, 385 flow. Second operand 9 states and 153 transitions. [2024-06-04 16:15:41,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 73 transitions, 567 flow [2024-06-04 16:15:41,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 73 transitions, 507 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:41,557 INFO L231 Difference]: Finished difference. Result has 77 places, 55 transitions, 372 flow [2024-06-04 16:15:41,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=372, PETRI_PLACES=77, PETRI_TRANSITIONS=55} [2024-06-04 16:15:41,557 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-04 16:15:41,558 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 55 transitions, 372 flow [2024-06-04 16:15:41,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:41,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:41,558 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 16:15:41,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:15:41,558 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:41,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:41,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1937895760, now seen corresponding path program 1 times [2024-06-04 16:15:41,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:41,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265161050] [2024-06-04 16:15:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:41,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:41,711 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 16:15:41,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:41,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265161050] [2024-06-04 16:15:41,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265161050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:41,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:41,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:41,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266224513] [2024-06-04 16:15:41,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:41,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:41,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:41,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:41,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:41,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:41,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 55 transitions, 372 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:41,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:41,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:41,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:41,827 INFO L124 PetriNetUnfolderBase]: 155/361 cut-off events. [2024-06-04 16:15:41,828 INFO L125 PetriNetUnfolderBase]: For 4339/4339 co-relation queries the response was YES. [2024-06-04 16:15:41,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1390 conditions, 361 events. 155/361 cut-off events. For 4339/4339 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1704 event pairs, 25 based on Foata normal form. 6/365 useless extension candidates. Maximal degree in co-relation 1353. Up to 126 conditions per place. [2024-06-04 16:15:41,830 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 43 selfloop transitions, 16 changer transitions 12/76 dead transitions. [2024-06-04 16:15:41,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 76 transitions, 608 flow [2024-06-04 16:15:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 16:15:41,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604838709677419 [2024-06-04 16:15:41,831 INFO L175 Difference]: Start difference. First operand has 77 places, 55 transitions, 372 flow. Second operand 8 states and 139 transitions. [2024-06-04 16:15:41,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 76 transitions, 608 flow [2024-06-04 16:15:41,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 76 transitions, 548 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:41,837 INFO L231 Difference]: Finished difference. Result has 77 places, 52 transitions, 329 flow [2024-06-04 16:15:41,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=329, PETRI_PLACES=77, PETRI_TRANSITIONS=52} [2024-06-04 16:15:41,837 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-04 16:15:41,837 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 52 transitions, 329 flow [2024-06-04 16:15:41,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:41,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:41,838 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 16:15:41,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:15:41,838 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:41,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:41,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1939769710, now seen corresponding path program 2 times [2024-06-04 16:15:41,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:41,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008822205] [2024-06-04 16:15:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:41,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:41,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:41,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008822205] [2024-06-04 16:15:41,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008822205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:41,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:41,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:41,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442724568] [2024-06-04 16:15:41,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:41,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:41,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:41,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:41,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:42,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:42,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 52 transitions, 329 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:42,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:42,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:42,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:42,091 INFO L124 PetriNetUnfolderBase]: 139/327 cut-off events. [2024-06-04 16:15:42,091 INFO L125 PetriNetUnfolderBase]: For 4685/4685 co-relation queries the response was YES. [2024-06-04 16:15:42,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 327 events. 139/327 cut-off events. For 4685/4685 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1515 event pairs, 23 based on Foata normal form. 6/331 useless extension candidates. Maximal degree in co-relation 1231. Up to 126 conditions per place. [2024-06-04 16:15:42,093 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 42 selfloop transitions, 15 changer transitions 6/68 dead transitions. [2024-06-04 16:15:42,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 68 transitions, 539 flow [2024-06-04 16:15:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-04 16:15:42,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529953917050692 [2024-06-04 16:15:42,094 INFO L175 Difference]: Start difference. First operand has 77 places, 52 transitions, 329 flow. Second operand 7 states and 120 transitions. [2024-06-04 16:15:42,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 68 transitions, 539 flow [2024-06-04 16:15:42,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 495 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:42,099 INFO L231 Difference]: Finished difference. Result has 72 places, 50 transitions, 312 flow [2024-06-04 16:15:42,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=312, PETRI_PLACES=72, PETRI_TRANSITIONS=50} [2024-06-04 16:15:42,100 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-04 16:15:42,100 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 50 transitions, 312 flow [2024-06-04 16:15:42,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:42,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:42,100 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 16:15:42,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:15:42,101 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:42,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:42,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1690260332, now seen corresponding path program 3 times [2024-06-04 16:15:42,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:42,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288418084] [2024-06-04 16:15:42,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:42,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:42,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:42,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288418084] [2024-06-04 16:15:42,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288418084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:42,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:42,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:42,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011976545] [2024-06-04 16:15:42,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:42,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:42,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:42,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:42,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:42,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 50 transitions, 312 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:42,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:42,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:42,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:42,345 INFO L124 PetriNetUnfolderBase]: 115/275 cut-off events. [2024-06-04 16:15:42,346 INFO L125 PetriNetUnfolderBase]: For 2847/2847 co-relation queries the response was YES. [2024-06-04 16:15:42,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 275 events. 115/275 cut-off events. For 2847/2847 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1216 event pairs, 13 based on Foata normal form. 8/281 useless extension candidates. Maximal degree in co-relation 931. Up to 140 conditions per place. [2024-06-04 16:15:42,347 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 15 changer transitions 8/62 dead transitions. [2024-06-04 16:15:42,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 62 transitions, 460 flow [2024-06-04 16:15:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 16:15:42,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-06-04 16:15:42,348 INFO L175 Difference]: Start difference. First operand has 72 places, 50 transitions, 312 flow. Second operand 7 states and 119 transitions. [2024-06-04 16:15:42,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 62 transitions, 460 flow [2024-06-04 16:15:42,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 62 transitions, 426 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:42,352 INFO L231 Difference]: Finished difference. Result has 70 places, 45 transitions, 284 flow [2024-06-04 16:15:42,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=284, PETRI_PLACES=70, PETRI_TRANSITIONS=45} [2024-06-04 16:15:42,352 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2024-06-04 16:15:42,353 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 45 transitions, 284 flow [2024-06-04 16:15:42,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:42,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:42,353 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 16:15:42,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:15:42,353 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:42,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:42,354 INFO L85 PathProgramCache]: Analyzing trace with hash 573543614, now seen corresponding path program 4 times [2024-06-04 16:15:42,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:42,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528793565] [2024-06-04 16:15:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:42,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:42,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:42,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528793565] [2024-06-04 16:15:42,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528793565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:42,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:42,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:42,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881018428] [2024-06-04 16:15:42,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:42,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:42,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:42,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:42,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:42,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:42,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 45 transitions, 284 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:42,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:42,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:42,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:42,603 INFO L124 PetriNetUnfolderBase]: 105/249 cut-off events. [2024-06-04 16:15:42,603 INFO L125 PetriNetUnfolderBase]: For 2488/2488 co-relation queries the response was YES. [2024-06-04 16:15:42,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 249 events. 105/249 cut-off events. For 2488/2488 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1053 event pairs, 24 based on Foata normal form. 8/255 useless extension candidates. Maximal degree in co-relation 854. Up to 131 conditions per place. [2024-06-04 16:15:42,604 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 28 selfloop transitions, 17 changer transitions 9/59 dead transitions. [2024-06-04 16:15:42,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 59 transitions, 430 flow [2024-06-04 16:15:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:42,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:42,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-04 16:15:42,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197132616487455 [2024-06-04 16:15:42,606 INFO L175 Difference]: Start difference. First operand has 70 places, 45 transitions, 284 flow. Second operand 9 states and 145 transitions. [2024-06-04 16:15:42,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 59 transitions, 430 flow [2024-06-04 16:15:42,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 59 transitions, 377 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-04 16:15:42,609 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 253 flow [2024-06-04 16:15:42,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=253, PETRI_PLACES=67, PETRI_TRANSITIONS=42} [2024-06-04 16:15:42,610 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-04 16:15:42,610 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 253 flow [2024-06-04 16:15:42,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:42,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:42,610 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 16:15:42,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:15:42,610 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:42,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:42,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1942526772, now seen corresponding path program 1 times [2024-06-04 16:15:42,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:42,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423457046] [2024-06-04 16:15:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:42,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:42,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:42,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423457046] [2024-06-04 16:15:42,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423457046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:42,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:42,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:42,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988741527] [2024-06-04 16:15:42,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:42,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:42,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:42,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:42,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 42 transitions, 253 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:42,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:42,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:42,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:42,864 INFO L124 PetriNetUnfolderBase]: 118/284 cut-off events. [2024-06-04 16:15:42,864 INFO L125 PetriNetUnfolderBase]: For 3064/3064 co-relation queries the response was YES. [2024-06-04 16:15:42,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 284 events. 118/284 cut-off events. For 3064/3064 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1281 event pairs, 32 based on Foata normal form. 6/288 useless extension candidates. Maximal degree in co-relation 1004. Up to 111 conditions per place. [2024-06-04 16:15:42,866 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 32 selfloop transitions, 16 changer transitions 7/60 dead transitions. [2024-06-04 16:15:42,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 60 transitions, 443 flow [2024-06-04 16:15:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:42,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:42,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 16:15:42,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2024-06-04 16:15:42,867 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 253 flow. Second operand 9 states and 147 transitions. [2024-06-04 16:15:42,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 60 transitions, 443 flow [2024-06-04 16:15:42,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 401 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:42,874 INFO L231 Difference]: Finished difference. Result has 65 places, 39 transitions, 233 flow [2024-06-04 16:15:42,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=233, PETRI_PLACES=65, PETRI_TRANSITIONS=39} [2024-06-04 16:15:42,874 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-04 16:15:42,875 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 39 transitions, 233 flow [2024-06-04 16:15:42,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:42,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:42,875 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 16:15:42,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:15:42,875 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:42,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:42,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2102342258, now seen corresponding path program 2 times [2024-06-04 16:15:42,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:42,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031665912] [2024-06-04 16:15:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:42,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:43,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:43,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031665912] [2024-06-04 16:15:43,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031665912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:43,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:43,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:43,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778248827] [2024-06-04 16:15:43,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:43,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:43,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:43,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:43,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:43,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 39 transitions, 233 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:43,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:43,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:43,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:43,116 INFO L124 PetriNetUnfolderBase]: 91/227 cut-off events. [2024-06-04 16:15:43,116 INFO L125 PetriNetUnfolderBase]: For 2020/2020 co-relation queries the response was YES. [2024-06-04 16:15:43,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 227 events. 91/227 cut-off events. For 2020/2020 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 937 event pairs, 26 based on Foata normal form. 8/233 useless extension candidates. Maximal degree in co-relation 724. Up to 117 conditions per place. [2024-06-04 16:15:43,118 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 26 selfloop transitions, 12 changer transitions 10/53 dead transitions. [2024-06-04 16:15:43,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 53 transitions, 365 flow [2024-06-04 16:15:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:43,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-04 16:15:43,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089605734767025 [2024-06-04 16:15:43,119 INFO L175 Difference]: Start difference. First operand has 65 places, 39 transitions, 233 flow. Second operand 9 states and 142 transitions. [2024-06-04 16:15:43,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 53 transitions, 365 flow [2024-06-04 16:15:43,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 331 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:43,122 INFO L231 Difference]: Finished difference. Result has 65 places, 35 transitions, 203 flow [2024-06-04 16:15:43,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=203, PETRI_PLACES=65, PETRI_TRANSITIONS=35} [2024-06-04 16:15:43,123 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-04 16:15:43,123 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 35 transitions, 203 flow [2024-06-04 16:15:43,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:43,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:43,124 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 16:15:43,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:15:43,124 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:43,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash 374093954, now seen corresponding path program 5 times [2024-06-04 16:15:43,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:43,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509470557] [2024-06-04 16:15:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:43,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:43,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:43,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509470557] [2024-06-04 16:15:43,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509470557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:43,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:43,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:43,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252270890] [2024-06-04 16:15:43,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:43,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:43,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:43,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:43,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:43,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:43,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 35 transitions, 203 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:43,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:43,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:43,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:43,345 INFO L124 PetriNetUnfolderBase]: 73/195 cut-off events. [2024-06-04 16:15:43,345 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2024-06-04 16:15:43,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 195 events. 73/195 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 733 event pairs, 19 based on Foata normal form. 6/199 useless extension candidates. Maximal degree in co-relation 594. Up to 62 conditions per place. [2024-06-04 16:15:43,346 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 18 selfloop transitions, 5 changer transitions 22/50 dead transitions. [2024-06-04 16:15:43,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 50 transitions, 327 flow [2024-06-04 16:15:43,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-04 16:15:43,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017921146953405 [2024-06-04 16:15:43,347 INFO L175 Difference]: Start difference. First operand has 65 places, 35 transitions, 203 flow. Second operand 9 states and 140 transitions. [2024-06-04 16:15:43,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 50 transitions, 327 flow [2024-06-04 16:15:43,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 50 transitions, 299 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:43,349 INFO L231 Difference]: Finished difference. Result has 63 places, 25 transitions, 129 flow [2024-06-04 16:15:43,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=129, PETRI_PLACES=63, PETRI_TRANSITIONS=25} [2024-06-04 16:15:43,350 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-04 16:15:43,350 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 25 transitions, 129 flow [2024-06-04 16:15:43,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:43,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:43,351 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 16:15:43,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:15:43,351 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:43,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:43,351 INFO L85 PathProgramCache]: Analyzing trace with hash 358009938, now seen corresponding path program 3 times [2024-06-04 16:15:43,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:43,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381004181] [2024-06-04 16:15:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:43,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:43,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:43,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381004181] [2024-06-04 16:15:43,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381004181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:43,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:43,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:43,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194488713] [2024-06-04 16:15:43,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:43,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:43,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:43,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:43,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:43,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:43,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 25 transitions, 129 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:43,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:43,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:43,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:43,563 INFO L124 PetriNetUnfolderBase]: 42/116 cut-off events. [2024-06-04 16:15:43,563 INFO L125 PetriNetUnfolderBase]: For 1220/1220 co-relation queries the response was YES. [2024-06-04 16:15:43,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 116 events. 42/116 cut-off events. For 1220/1220 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 341 event pairs, 15 based on Foata normal form. 6/121 useless extension candidates. Maximal degree in co-relation 360. Up to 52 conditions per place. [2024-06-04 16:15:43,564 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 16 selfloop transitions, 4 changer transitions 10/35 dead transitions. [2024-06-04 16:15:43,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 35 transitions, 213 flow [2024-06-04 16:15:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-04 16:15:43,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4798387096774194 [2024-06-04 16:15:43,565 INFO L175 Difference]: Start difference. First operand has 63 places, 25 transitions, 129 flow. Second operand 8 states and 119 transitions. [2024-06-04 16:15:43,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 35 transitions, 213 flow [2024-06-04 16:15:43,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 35 transitions, 180 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-04 16:15:43,567 INFO L231 Difference]: Finished difference. Result has 48 places, 22 transitions, 92 flow [2024-06-04 16:15:43,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=92, PETRI_PLACES=48, PETRI_TRANSITIONS=22} [2024-06-04 16:15:43,567 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2024-06-04 16:15:43,567 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 22 transitions, 92 flow [2024-06-04 16:15:43,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:43,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:43,568 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 16:15:43,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:15:43,568 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 16:15:43,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:43,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1886747646, now seen corresponding path program 4 times [2024-06-04 16:15:43,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:43,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577290638] [2024-06-04 16:15:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:43,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:43,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:43,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577290638] [2024-06-04 16:15:43,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577290638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:43,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:43,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:43,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384163216] [2024-06-04 16:15:43,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:43,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:43,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:43,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:43,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:43,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-04 16:15:43,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 22 transitions, 92 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:43,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:43,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-04 16:15:43,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:43,762 INFO L124 PetriNetUnfolderBase]: 20/64 cut-off events. [2024-06-04 16:15:43,762 INFO L125 PetriNetUnfolderBase]: For 268/268 co-relation queries the response was YES. [2024-06-04 16:15:43,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 64 events. 20/64 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 103 event pairs, 0 based on Foata normal form. 6/69 useless extension candidates. Maximal degree in co-relation 153. Up to 24 conditions per place. [2024-06-04 16:15:43,763 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2024-06-04 16:15:43,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 28 transitions, 132 flow [2024-06-04 16:15:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-04 16:15:43,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-04 16:15:43,764 INFO L175 Difference]: Start difference. First operand has 48 places, 22 transitions, 92 flow. Second operand 8 states and 112 transitions. [2024-06-04 16:15:43,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 28 transitions, 132 flow [2024-06-04 16:15:43,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 28 transitions, 108 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-04 16:15:43,764 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2024-06-04 16:15:43,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2024-06-04 16:15:43,766 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-04 16:15:43,766 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2024-06-04 16:15:43,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:43,768 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-04 16:15:43,769 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-04 16:15:43,769 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-04 16:15:43,769 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-04 16:15:43,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:15:43,770 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:43,772 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-04 16:15:43,772 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-04 16:15:43,775 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-04 16:15:43,775 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-04 16:15:43,775 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 04:15:43 BasicIcfg [2024-06-04 16:15:43,776 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-04 16:15:43,776 INFO L158 Benchmark]: Toolchain (without parser) took 9159.86ms. Allocated memory was 151.0MB in the beginning and 318.8MB in the end (delta: 167.8MB). Free memory was 111.6MB in the beginning and 260.4MB in the end (delta: -148.8MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2024-06-04 16:15:43,776 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 78.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 16:15:43,776 INFO L158 Benchmark]: Witness Parser took 0.39ms. Allocated memory is still 151.0MB. Free memory is still 115.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 16:15:43,777 INFO L158 Benchmark]: CACSL2BoogieTranslator took 458.43ms. Allocated memory is still 151.0MB. Free memory was 111.1MB in the beginning and 84.4MB in the end (delta: 26.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-04 16:15:43,777 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.37ms. Allocated memory is still 151.0MB. Free memory was 84.4MB in the beginning and 81.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-04 16:15:43,777 INFO L158 Benchmark]: Boogie Preprocessor took 29.47ms. Allocated memory is still 151.0MB. Free memory was 81.8MB in the beginning and 79.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-04 16:15:43,777 INFO L158 Benchmark]: RCFGBuilder took 481.04ms. Allocated memory is still 151.0MB. Free memory was 79.7MB in the beginning and 53.9MB in the end (delta: 25.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-04 16:15:43,778 INFO L158 Benchmark]: TraceAbstraction took 8151.88ms. Allocated memory was 151.0MB in the beginning and 318.8MB in the end (delta: 167.8MB). Free memory was 53.4MB in the beginning and 260.4MB in the end (delta: -207.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 16:15:43,778 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 78.7MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.39ms. Allocated memory is still 151.0MB. Free memory is still 115.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 458.43ms. Allocated memory is still 151.0MB. Free memory was 111.1MB in the beginning and 84.4MB in the end (delta: 26.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.37ms. Allocated memory is still 151.0MB. Free memory was 84.4MB in the beginning and 81.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.47ms. Allocated memory is still 151.0MB. Free memory was 81.8MB in the beginning and 79.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 481.04ms. Allocated memory is still 151.0MB. Free memory was 79.7MB in the beginning and 53.9MB in the end (delta: 25.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 8151.88ms. Allocated memory was 151.0MB in the beginning and 318.8MB in the end (delta: 167.8MB). Free memory was 53.4MB in the beginning and 260.4MB in the end (delta: -207.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 763]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 764]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 49 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 8.0s, OverallIterations: 29, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1402 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1081 mSDsluCounter, 397 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 253 mSDsCounter, 105 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4161 IncrementalHoareTripleChecker+Invalid, 4266 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 105 mSolverCounterUnsat, 144 mSDtfsCounter, 4161 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=385occurred in iteration=19, InterpolantAutomatonStates: 210, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 444 NumberOfCodeBlocks, 444 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 415 ConstructedInterpolants, 0 QuantifiedInterpolants, 3405 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 29 InterpolantComputations, 29 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-04 16:15:43,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE