./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_02-simple_racefree.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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/goblint-regression/28-race_reach_02-simple_racefree.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_02-simple_racefree.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 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:26:48,134 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:26:48,198 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:26:48,202 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:26:48,202 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:26:48,226 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:26:48,227 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:26:48,227 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:26:48,228 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:26:48,231 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:26:48,231 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:26:48,231 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:26:48,232 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:26:48,233 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:26:48,233 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:26:48,233 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:26:48,234 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:26:48,234 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:26:48,234 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:26:48,234 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:26:48,235 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:26:48,235 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:26:48,235 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:26:48,235 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:26:48,236 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:26:48,236 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:26:48,236 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:26:48,236 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:26:48,237 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:26:48,237 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:26:48,238 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:26:48,238 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:26:48,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:26:48,238 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:26:48,239 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:26:48,239 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:26:48,239 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:26:48,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:26:48,239 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:26:48,240 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:26:48,240 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:26:48,240 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:26:48,240 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:26:48,240 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:26:48,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:26:48,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:26:48,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:26:48,430 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:26:48,430 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:26:48,431 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2024-02-07 14:26:49,532 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:26:49,726 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:26:49,727 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2024-02-07 14:26:49,738 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17498f6a1/762127af0bc84bf6b827262180e088e9/FLAG34208b9c7 [2024-02-07 14:26:49,754 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17498f6a1/762127af0bc84bf6b827262180e088e9 [2024-02-07 14:26:49,757 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:26:49,757 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:26:49,758 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_02-simple_racefree.yml/witness.yml [2024-02-07 14:26:49,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:26:49,823 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:26:49,824 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:26:49,824 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:26:49,827 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:26:49,828 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:26:49" (1/2) ... [2024-02-07 14:26:49,828 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69dc20e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:49, skipping insertion in model container [2024-02-07 14:26:49,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:26:49" (1/2) ... [2024-02-07 14:26:49,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@33034407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:26:49, skipping insertion in model container [2024-02-07 14:26:49,831 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:26:49" (2/2) ... [2024-02-07 14:26:49,831 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69dc20e6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:49, skipping insertion in model container [2024-02-07 14:26:49,831 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:26:49" (2/2) ... [2024-02-07 14:26:49,831 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:26:49,853 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:26:49,854 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] global == 1 [2024-02-07 14:26:49,854 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] global == 0 [2024-02-07 14:26:49,855 INFO L76 edCorrectnessWitness]: Location invariant after [L709-L709] global == 0 [2024-02-07 14:26:49,855 INFO L76 edCorrectnessWitness]: Location invariant before [L711-L711] ((((((((((((((((((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6 [2024-02-07 14:26:49,855 INFO L76 edCorrectnessWitness]: Location invariant before [L709-L709] global == 0 [2024-02-07 14:26:49,855 INFO L76 edCorrectnessWitness]: Location invariant after [L702-L702] global == 0 [2024-02-07 14:26:49,855 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] global == 1 [2024-02-07 14:26:49,855 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] global == 0 [2024-02-07 14:26:49,855 INFO L76 edCorrectnessWitness]: Location invariant after [L702-L702] global == 1 [2024-02-07 14:26:49,856 INFO L76 edCorrectnessWitness]: Location invariant after [L707-L707] ((((((((((((((((((((((((i == 19 || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20 [2024-02-07 14:26:49,856 INFO L76 edCorrectnessWitness]: Location invariant before [L707-L707] ((((((((((((((((((((((((i == 19 || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20 [2024-02-07 14:26:49,856 INFO L76 edCorrectnessWitness]: Location invariant after [L702-L702] global == 1 [2024-02-07 14:26:49,856 INFO L76 edCorrectnessWitness]: Location invariant after [L702-L702] global == 0 [2024-02-07 14:26:49,856 INFO L76 edCorrectnessWitness]: Location invariant after [L711-L711] ((((((((((((((((((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6 [2024-02-07 14:26:49,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:26:50,155 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2024-02-07 14:26:50,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:26:50,215 INFO L203 MainTranslator]: Completed pre-run [2024-02-07 14:26:50,273 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:26:50,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:26:50,365 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:26:50,365 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:50 WrapperNode [2024-02-07 14:26:50,365 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:26:50,367 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:26:50,367 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:26:50,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:26:50,372 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 07.02 02:26:50" (1/1) ... [2024-02-07 14:26:50,389 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 07.02 02:26:50" (1/1) ... [2024-02-07 14:26:50,409 INFO L138 Inliner]: procedures = 171, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2024-02-07 14:26:50,415 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:26:50,415 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:26:50,416 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:26:50,416 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:26:50,425 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:50" (1/1) ... [2024-02-07 14:26:50,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:50" (1/1) ... [2024-02-07 14:26:50,427 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:50" (1/1) ... [2024-02-07 14:26:50,440 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 2, 5, 5]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 0, 5, 5]. The 1 writes are split as follows [0, 1, 0, 0]. [2024-02-07 14:26:50,440 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:50" (1/1) ... [2024-02-07 14:26:50,441 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:50" (1/1) ... [2024-02-07 14:26:50,446 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:50" (1/1) ... [2024-02-07 14:26:50,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:50" (1/1) ... [2024-02-07 14:26:50,450 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:50" (1/1) ... [2024-02-07 14:26:50,451 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:50" (1/1) ... [2024-02-07 14:26:50,454 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:26:50,454 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:26:50,454 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:26:50,455 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:26:50,455 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:50" (1/1) ... [2024-02-07 14:26:50,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:26:50,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:26:50,509 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) [2024-02-07 14:26:50,528 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 [2024-02-07 14:26:50,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:26:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:26:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:26:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:26:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:26:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:26:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:26:50,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:26:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 14:26:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:26:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:26:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-02-07 14:26:50,543 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-02-07 14:26:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:26:50,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:26:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:26:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:26:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:26:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 14:26:50,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:26:50,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:26:50,545 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:26:50,657 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:26:50,659 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:26:50,898 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:26:50,899 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:26:51,045 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:26:51,046 INFO L320 CfgBuilder]: Removed 10 assume(true) statements. [2024-02-07 14:26:51,047 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:26:51 BoogieIcfgContainer [2024-02-07 14:26:51,047 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:26:51,050 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:26:51,051 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:26:51,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:26:51,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:26:49" (1/4) ... [2024-02-07 14:26:51,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a34e317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:26:51, skipping insertion in model container [2024-02-07 14:26:51,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:26:49" (2/4) ... [2024-02-07 14:26:51,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a34e317 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:26:51, skipping insertion in model container [2024-02-07 14:26:51,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:26:50" (3/4) ... [2024-02-07 14:26:51,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a34e317 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:26:51, skipping insertion in model container [2024-02-07 14:26:51,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:26:51" (4/4) ... [2024-02-07 14:26:51,058 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2024-02-07 14:26:51,072 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:26:51,072 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-02-07 14:26:51,072 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:26:51,105 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-02-07 14:26:51,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 60 transitions, 127 flow [2024-02-07 14:26:51,184 INFO L124 PetriNetUnfolderBase]: 13/81 cut-off events. [2024-02-07 14:26:51,185 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:26:51,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 81 events. 13/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 280 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2024-02-07 14:26:51,189 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 60 transitions, 127 flow [2024-02-07 14:26:51,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 59 transitions, 125 flow [2024-02-07 14:26:51,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:26:51,214 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;@7c8348c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:26:51,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-02-07 14:26:51,218 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:26:51,219 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-07 14:26:51,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:26:51,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:51,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:26:51,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2024-02-07 14:26:51,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:51,224 INFO L85 PathProgramCache]: Analyzing trace with hash 333378834, now seen corresponding path program 1 times [2024-02-07 14:26:51,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:51,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465587428] [2024-02-07 14:26:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:51,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:51,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:51,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465587428] [2024-02-07 14:26:51,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465587428] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:51,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:51,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:26:51,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799734504] [2024-02-07 14:26:51,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:51,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:26:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:51,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:26:51,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:26:51,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-02-07 14:26:51,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 59 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2024-02-07 14:26:51,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:51,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-02-07 14:26:51,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:26:51,646 INFO L124 PetriNetUnfolderBase]: 33/128 cut-off events. [2024-02-07 14:26:51,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:26:51,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 128 events. 33/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 354 event pairs, 22 based on Foata normal form. 15/142 useless extension candidates. Maximal degree in co-relation 202. Up to 69 conditions per place. [2024-02-07 14:26:51,650 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 26 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-02-07 14:26:51,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 142 flow [2024-02-07 14:26:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:26:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:26:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 14:26:51,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-02-07 14:26:51,661 INFO L175 Difference]: Start difference. First operand has 53 places, 59 transitions, 125 flow. Second operand 4 states and 127 transitions. [2024-02-07 14:26:51,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 142 flow [2024-02-07 14:26:51,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 142 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:26:51,665 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 66 flow [2024-02-07 14:26:51,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=66, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2024-02-07 14:26:51,671 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -18 predicate places. [2024-02-07 14:26:51,671 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 66 flow [2024-02-07 14:26:51,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2024-02-07 14:26:51,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:51,672 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-07 14:26:51,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:26:51,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2024-02-07 14:26:51,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:51,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1745477179, now seen corresponding path program 1 times [2024-02-07 14:26:51,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:51,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430157349] [2024-02-07 14:26:51,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:51,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:26:51,711 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:26:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:26:51,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:26:51,755 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:26:51,756 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2024-02-07 14:26:51,758 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 13 remaining) [2024-02-07 14:26:51,758 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 13 remaining) [2024-02-07 14:26:51,758 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (9 of 13 remaining) [2024-02-07 14:26:51,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 13 remaining) [2024-02-07 14:26:51,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 13 remaining) [2024-02-07 14:26:51,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 13 remaining) [2024-02-07 14:26:51,760 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 13 remaining) [2024-02-07 14:26:51,760 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 13 remaining) [2024-02-07 14:26:51,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 13 remaining) [2024-02-07 14:26:51,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 13 remaining) [2024-02-07 14:26:51,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 13 remaining) [2024-02-07 14:26:51,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 13 remaining) [2024-02-07 14:26:51,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:26:51,764 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-07 14:26:51,766 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:26:51,767 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-07 14:26:51,792 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:26:51,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 91 transitions, 198 flow [2024-02-07 14:26:51,824 INFO L124 PetriNetUnfolderBase]: 24/146 cut-off events. [2024-02-07 14:26:51,825 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-07 14:26:51,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 146 events. 24/146 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 595 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2024-02-07 14:26:51,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 91 transitions, 198 flow [2024-02-07 14:26:51,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 91 transitions, 198 flow [2024-02-07 14:26:51,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:26:51,835 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;@7c8348c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:26:51,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-02-07 14:26:51,837 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:26:51,837 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-02-07 14:26:51,837 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:26:51,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:51,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:26:51,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2024-02-07 14:26:51,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:51,838 INFO L85 PathProgramCache]: Analyzing trace with hash 420248458, now seen corresponding path program 1 times [2024-02-07 14:26:51,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:51,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907186162] [2024-02-07 14:26:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:51,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:51,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:51,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907186162] [2024-02-07 14:26:51,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907186162] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:51,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:51,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:26:51,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552195564] [2024-02-07 14:26:51,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:51,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:26:51,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:51,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:26:51,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:26:51,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 91 [2024-02-07 14:26:51,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 91 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:51,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:51,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 91 [2024-02-07 14:26:51,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:26:52,661 INFO L124 PetriNetUnfolderBase]: 3972/7650 cut-off events. [2024-02-07 14:26:52,662 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2024-02-07 14:26:52,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14025 conditions, 7650 events. 3972/7650 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 59723 event pairs, 155 based on Foata normal form. 1741/8672 useless extension candidates. Maximal degree in co-relation 11095. Up to 5949 conditions per place. [2024-02-07 14:26:52,698 INFO L140 encePairwiseOnDemand]: 72/91 looper letters, 77 selfloop transitions, 3 changer transitions 0/113 dead transitions. [2024-02-07 14:26:52,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 402 flow [2024-02-07 14:26:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:26:52,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:26:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 248 transitions. [2024-02-07 14:26:52,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813186813186813 [2024-02-07 14:26:52,700 INFO L175 Difference]: Start difference. First operand has 79 places, 91 transitions, 198 flow. Second operand 4 states and 248 transitions. [2024-02-07 14:26:52,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 402 flow [2024-02-07 14:26:52,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 402 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:26:52,704 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 186 flow [2024-02-07 14:26:52,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2024-02-07 14:26:52,705 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 5 predicate places. [2024-02-07 14:26:52,705 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 186 flow [2024-02-07 14:26:52,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:52,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:52,706 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-02-07 14:26:52,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:26:52,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2024-02-07 14:26:52,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:52,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2135578468, now seen corresponding path program 1 times [2024-02-07 14:26:52,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:52,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961267745] [2024-02-07 14:26:52,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:52,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:52,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961267745] [2024-02-07 14:26:52,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961267745] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:26:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896313532] [2024-02-07 14:26:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:52,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:26:52,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:26:52,833 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:26:52,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:26:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:52,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 14:26:52,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:26:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:52,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:26:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:52,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896313532] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:26:52,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:26:52,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-02-07 14:26:52,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140866535] [2024-02-07 14:26:52,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:26:52,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:26:52,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:52,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:26:52,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:26:52,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 91 [2024-02-07 14:26:52,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:52,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:52,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 91 [2024-02-07 14:26:52,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:26:53,163 INFO L124 PetriNetUnfolderBase]: 957/1883 cut-off events. [2024-02-07 14:26:53,163 INFO L125 PetriNetUnfolderBase]: For 466/466 co-relation queries the response was YES. [2024-02-07 14:26:53,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3824 conditions, 1883 events. 957/1883 cut-off events. For 466/466 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 11784 event pairs, 0 based on Foata normal form. 288/2119 useless extension candidates. Maximal degree in co-relation 322. Up to 1224 conditions per place. [2024-02-07 14:26:53,172 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 62 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2024-02-07 14:26:53,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 330 flow [2024-02-07 14:26:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:26:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:26:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-02-07 14:26:53,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098901098901099 [2024-02-07 14:26:53,174 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 186 flow. Second operand 5 states and 232 transitions. [2024-02-07 14:26:53,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 330 flow [2024-02-07 14:26:53,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 324 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:26:53,176 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 128 flow [2024-02-07 14:26:53,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-02-07 14:26:53,177 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -15 predicate places. [2024-02-07 14:26:53,177 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 128 flow [2024-02-07 14:26:53,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:53,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:53,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:26:53,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 14:26:53,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:26:53,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2024-02-07 14:26:53,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:53,392 INFO L85 PathProgramCache]: Analyzing trace with hash -892779983, now seen corresponding path program 1 times [2024-02-07 14:26:53,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:53,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437051278] [2024-02-07 14:26:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:53,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:53,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:53,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437051278] [2024-02-07 14:26:53,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437051278] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:53,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:53,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:26:53,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705352161] [2024-02-07 14:26:53,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:53,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:26:53,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:53,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:26:53,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:26:53,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 91 [2024-02-07 14:26:53,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:53,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:53,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 91 [2024-02-07 14:26:53,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:26:53,669 INFO L124 PetriNetUnfolderBase]: 1281/2856 cut-off events. [2024-02-07 14:26:53,684 INFO L125 PetriNetUnfolderBase]: For 727/727 co-relation queries the response was YES. [2024-02-07 14:26:53,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5356 conditions, 2856 events. 1281/2856 cut-off events. For 727/727 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 19854 event pairs, 689 based on Foata normal form. 80/2811 useless extension candidates. Maximal degree in co-relation 4459. Up to 1235 conditions per place. [2024-02-07 14:26:53,694 INFO L140 encePairwiseOnDemand]: 78/91 looper letters, 49 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-02-07 14:26:53,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 298 flow [2024-02-07 14:26:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:26:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:26:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2024-02-07 14:26:53,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457875457875457 [2024-02-07 14:26:53,696 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 128 flow. Second operand 3 states and 149 transitions. [2024-02-07 14:26:53,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 298 flow [2024-02-07 14:26:53,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 290 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:26:53,699 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 179 flow [2024-02-07 14:26:53,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2024-02-07 14:26:53,701 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -14 predicate places. [2024-02-07 14:26:53,701 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 179 flow [2024-02-07 14:26:53,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:53,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:53,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:26:53,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:26:53,702 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2024-02-07 14:26:53,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:53,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1906375208, now seen corresponding path program 1 times [2024-02-07 14:26:53,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:53,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442752105] [2024-02-07 14:26:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:53,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:53,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:53,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442752105] [2024-02-07 14:26:53,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442752105] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:53,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:53,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:26:53,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594276611] [2024-02-07 14:26:53,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:53,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:26:53,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:26:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:26:53,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 91 [2024-02-07 14:26:53,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:53,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:53,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 91 [2024-02-07 14:26:53,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:26:53,992 INFO L124 PetriNetUnfolderBase]: 937/1992 cut-off events. [2024-02-07 14:26:53,992 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2024-02-07 14:26:53,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4394 conditions, 1992 events. 937/1992 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 12171 event pairs, 521 based on Foata normal form. 200/2138 useless extension candidates. Maximal degree in co-relation 3459. Up to 843 conditions per place. [2024-02-07 14:26:54,003 INFO L140 encePairwiseOnDemand]: 80/91 looper letters, 43 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-02-07 14:26:54,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 286 flow [2024-02-07 14:26:54,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:26:54,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:26:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-02-07 14:26:54,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-02-07 14:26:54,005 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 179 flow. Second operand 4 states and 154 transitions. [2024-02-07 14:26:54,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 286 flow [2024-02-07 14:26:54,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 276 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:26:54,011 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 151 flow [2024-02-07 14:26:54,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2024-02-07 14:26:54,014 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -17 predicate places. [2024-02-07 14:26:54,014 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 151 flow [2024-02-07 14:26:54,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:54,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:54,014 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2024-02-07 14:26:54,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:26:54,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2024-02-07 14:26:54,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:54,015 INFO L85 PathProgramCache]: Analyzing trace with hash 703473228, now seen corresponding path program 1 times [2024-02-07 14:26:54,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:54,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756284953] [2024-02-07 14:26:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:54,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:26:54,035 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:26:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:26:54,053 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:26:54,053 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:26:54,053 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 17 remaining) [2024-02-07 14:26:54,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 17 remaining) [2024-02-07 14:26:54,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 17 remaining) [2024-02-07 14:26:54,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (13 of 17 remaining) [2024-02-07 14:26:54,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 17 remaining) [2024-02-07 14:26:54,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 17 remaining) [2024-02-07 14:26:54,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 17 remaining) [2024-02-07 14:26:54,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 17 remaining) [2024-02-07 14:26:54,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 17 remaining) [2024-02-07 14:26:54,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 17 remaining) [2024-02-07 14:26:54,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 17 remaining) [2024-02-07 14:26:54,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 17 remaining) [2024-02-07 14:26:54,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 17 remaining) [2024-02-07 14:26:54,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 17 remaining) [2024-02-07 14:26:54,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 17 remaining) [2024-02-07 14:26:54,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 17 remaining) [2024-02-07 14:26:54,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 17 remaining) [2024-02-07 14:26:54,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:26:54,058 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-02-07 14:26:54,059 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:26:54,059 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-07 14:26:54,082 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-07 14:26:54,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 122 transitions, 271 flow [2024-02-07 14:26:54,101 INFO L124 PetriNetUnfolderBase]: 38/226 cut-off events. [2024-02-07 14:26:54,101 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-02-07 14:26:54,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 226 events. 38/226 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1018 event pairs, 1 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 159. Up to 12 conditions per place. [2024-02-07 14:26:54,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 122 transitions, 271 flow [2024-02-07 14:26:54,104 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 122 transitions, 271 flow [2024-02-07 14:26:54,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:26:54,105 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;@7c8348c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:26:54,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-02-07 14:26:54,107 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:26:54,107 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-02-07 14:26:54,107 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:26:54,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:54,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:26:54,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 18 more)] === [2024-02-07 14:26:54,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:54,108 INFO L85 PathProgramCache]: Analyzing trace with hash 536701537, now seen corresponding path program 1 times [2024-02-07 14:26:54,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:54,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275926045] [2024-02-07 14:26:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:54,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:54,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:54,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275926045] [2024-02-07 14:26:54,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275926045] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:54,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:54,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:26:54,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849970016] [2024-02-07 14:26:54,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:54,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:26:54,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:54,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:26:54,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:26:54,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 122 [2024-02-07 14:26:54,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 122 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:54,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:54,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 122 [2024-02-07 14:26:54,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:27:03,356 INFO L124 PetriNetUnfolderBase]: 77072/128337 cut-off events. [2024-02-07 14:27:03,356 INFO L125 PetriNetUnfolderBase]: For 2505/2505 co-relation queries the response was YES. [2024-02-07 14:27:03,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236578 conditions, 128337 events. 77072/128337 cut-off events. For 2505/2505 co-relation queries the response was YES. Maximal size of possible extension queue 3022. Compared 1216569 event pairs, 23704 based on Foata normal form. 31978/152769 useless extension candidates. Maximal degree in co-relation 14838. Up to 106757 conditions per place. [2024-02-07 14:27:04,213 INFO L140 encePairwiseOnDemand]: 97/122 looper letters, 91 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2024-02-07 14:27:04,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 139 transitions, 493 flow [2024-02-07 14:27:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:27:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:27:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2024-02-07 14:27:04,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6475409836065574 [2024-02-07 14:27:04,216 INFO L175 Difference]: Start difference. First operand has 105 places, 122 transitions, 271 flow. Second operand 4 states and 316 transitions. [2024-02-07 14:27:04,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 139 transitions, 493 flow [2024-02-07 14:27:04,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 139 transitions, 493 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:27:04,220 INFO L231 Difference]: Finished difference. Result has 110 places, 103 transitions, 251 flow [2024-02-07 14:27:04,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=110, PETRI_TRANSITIONS=103} [2024-02-07 14:27:04,222 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, 5 predicate places. [2024-02-07 14:27:04,222 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 103 transitions, 251 flow [2024-02-07 14:27:04,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:27:04,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:27:04,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:27:04,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:27:04,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 18 more)] === [2024-02-07 14:27:04,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:27:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1709695432, now seen corresponding path program 1 times [2024-02-07 14:27:04,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:27:04,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857839751] [2024-02-07 14:27:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:27:04,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:27:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:27:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:27:04,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:27:04,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857839751] [2024-02-07 14:27:04,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857839751] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:27:04,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:27:04,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:27:04,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673165300] [2024-02-07 14:27:04,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:27:04,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:27:04,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:27:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:27:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:27:04,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 122 [2024-02-07 14:27:04,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 103 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:27:04,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:27:04,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 122 [2024-02-07 14:27:04,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand