./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/bigshot_s.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/bigshot_s.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d8006e4b Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/bigshot_s.i ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/bigshot_s.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-d8006e4-m [2024-02-05 10:25:20,645 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:25:20,707 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:25:20,712 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:25:20,713 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:25:20,733 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:25:20,734 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:25:20,734 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:25:20,735 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:25:20,738 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:25:20,738 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:25:20,738 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:25:20,739 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:25:20,740 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:25:20,740 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:25:20,740 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:25:20,740 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:25:20,741 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:25:20,741 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:25:20,741 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:25:20,742 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:25:20,742 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:25:20,742 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:25:20,743 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:25:20,743 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:25:20,743 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:25:20,743 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:25:20,743 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:25:20,744 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:25:20,744 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:25:20,745 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:25:20,745 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:25:20,745 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:25:20,745 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:25:20,745 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:25:20,745 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:25:20,746 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:25:20,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:25:20,746 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:25:20,746 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:25:20,746 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:25:20,746 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:25:20,747 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:25:20,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:25:20,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:25:21,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:25:21,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:25:21,021 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:25:21,021 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:25:21,022 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s.i [2024-02-05 10:25:22,228 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:25:22,571 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:25:22,573 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i [2024-02-05 10:25:22,587 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eea306d20/f1282c0b8d15430994b55dbcbb70e9a3/FLAGa51f1ec16 [2024-02-05 10:25:22,602 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eea306d20/f1282c0b8d15430994b55dbcbb70e9a3 [2024-02-05 10:25:22,604 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:25:22,605 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:25:22,605 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/bigshot_s.yml/witness.yml [2024-02-05 10:25:22,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:25:22,675 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:25:22,677 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:25:22,677 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:25:22,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:25:22,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:25:22" (1/2) ... [2024-02-05 10:25:22,682 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577eb456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:25:22, skipping insertion in model container [2024-02-05 10:25:22,682 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:25:22" (1/2) ... [2024-02-05 10:25:22,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7abfebb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:25:22, skipping insertion in model container [2024-02-05 10:25:22,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:25:22" (2/2) ... [2024-02-05 10:25:22,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577eb456 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:22, skipping insertion in model container [2024-02-05 10:25:22,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:25:22" (2/2) ... [2024-02-05 10:25:22,685 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:25:22,720 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:25:22,721 INFO L101 nessWitnessExtractor]: Location invariant before [L1116-L1116] (unsigned long )arg == 0UL [2024-02-05 10:25:22,721 INFO L101 nessWitnessExtractor]: Location invariant after [L1116-L1116] (unsigned long )arg == 0UL [2024-02-05 10:25:22,721 INFO L101 nessWitnessExtractor]: Location invariant before [L1116-L1116] (unsigned long )arg == 0UL [2024-02-05 10:25:22,721 INFO L101 nessWitnessExtractor]: Location invariant after [L1107-L1107] expression == 1 [2024-02-05 10:25:22,721 INFO L101 nessWitnessExtractor]: Location invariant before [L1122-L1122] v == 0 [2024-02-05 10:25:22,722 INFO L101 nessWitnessExtractor]: Location invariant before [L1112-L1112] (unsigned long )arg == 0UL [2024-02-05 10:25:22,722 INFO L101 nessWitnessExtractor]: Location invariant after [L1107-L1107] expression == 1 [2024-02-05 10:25:22,722 INFO L101 nessWitnessExtractor]: Location invariant before [L1107-L1107] expression == 0 [2024-02-05 10:25:22,722 INFO L101 nessWitnessExtractor]: Location invariant before [L1111-L1111] (unsigned long )arg == 0UL [2024-02-05 10:25:22,723 INFO L101 nessWitnessExtractor]: Location invariant before [L1107-L1107] ((0 <= expression) && (expression <= 1)) && (expression == 0 || expression == 1) [2024-02-05 10:25:22,723 INFO L101 nessWitnessExtractor]: Location invariant after [L1107-L1107] expression == 0 [2024-02-05 10:25:22,723 INFO L101 nessWitnessExtractor]: Location invariant before [L1117-L1117] (unsigned long )arg == 0UL [2024-02-05 10:25:22,723 INFO L101 nessWitnessExtractor]: Location invariant before [L1107-L1107] expression == 1 [2024-02-05 10:25:22,771 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:25:23,138 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i[55202,55215] [2024-02-05 10:25:23,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:25:23,168 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-05 10:25:23,246 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i[55202,55215] Start Parsing Local Start Parsing Local [2024-02-05 10:25:23,250 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:25:23,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:25:23,316 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:25:23,317 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:23 WrapperNode [2024-02-05 10:25:23,317 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:25:23,319 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:25:23,319 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:25:23,319 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:25:23,324 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 05.02 10:25:23" (1/1) ... [2024-02-05 10:25:23,349 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 05.02 10:25:23" (1/1) ... [2024-02-05 10:25:23,385 INFO L138 Inliner]: procedures = 323, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2024-02-05 10:25:23,386 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:25:23,386 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:25:23,387 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:25:23,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:25:23,417 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:23" (1/1) ... [2024-02-05 10:25:23,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:23" (1/1) ... [2024-02-05 10:25:23,429 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:23" (1/1) ... [2024-02-05 10:25:23,449 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 2, 9, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8, 0, 0]. The 3 writes are split as follows [0, 1, 0, 1, 1]. [2024-02-05 10:25:23,451 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:23" (1/1) ... [2024-02-05 10:25:23,451 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:23" (1/1) ... [2024-02-05 10:25:23,461 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:23" (1/1) ... [2024-02-05 10:25:23,467 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:23" (1/1) ... [2024-02-05 10:25:23,471 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:23" (1/1) ... [2024-02-05 10:25:23,482 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:23" (1/1) ... [2024-02-05 10:25:23,484 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:25:23,484 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:25:23,485 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:25:23,485 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:25:23,485 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:23" (1/1) ... [2024-02-05 10:25:23,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:25:23,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:23,568 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) [2024-02-05 10:25:23,569 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 [2024-02-05 10:25:23,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:25:23,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:25:23,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-02-05 10:25:23,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-02-05 10:25:23,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-02-05 10:25:23,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-02-05 10:25:23,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2024-02-05 10:25:23,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-05 10:25:23,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-05 10:25:23,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-05 10:25:23,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-05 10:25:23,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-05 10:25:23,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-05 10:25:23,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-05 10:25:23,625 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-05 10:25:23,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-05 10:25:23,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:25:23,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:25:23,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:25:23,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-05 10:25:23,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-05 10:25:23,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-05 10:25:23,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:25:23,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:25:23,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:25:23,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:25:23,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-05 10:25:23,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-05 10:25:23,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:25:23,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:25:23,639 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-05 10:25:23,828 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:25:23,830 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:25:24,056 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:25:24,057 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:25:24,127 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:25:24,128 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-02-05 10:25:24,128 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:25:24 BoogieIcfgContainer [2024-02-05 10:25:24,128 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:25:24,130 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:25:24,130 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:25:24,132 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:25:24,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:25:22" (1/4) ... [2024-02-05 10:25:24,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20fd6a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:25:24, skipping insertion in model container [2024-02-05 10:25:24,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:25:22" (2/4) ... [2024-02-05 10:25:24,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20fd6a80 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:25:24, skipping insertion in model container [2024-02-05 10:25:24,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:25:23" (3/4) ... [2024-02-05 10:25:24,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20fd6a80 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:25:24, skipping insertion in model container [2024-02-05 10:25:24,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:25:24" (4/4) ... [2024-02-05 10:25:24,134 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2024-02-05 10:25:24,147 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:25:24,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-02-05 10:25:24,148 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:25:24,199 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-05 10:25:24,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 98 flow [2024-02-05 10:25:24,256 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-02-05 10:25:24,257 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:25:24,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 40 events. 4/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-02-05 10:25:24,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 42 transitions, 98 flow [2024-02-05 10:25:24,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 39 transitions, 90 flow [2024-02-05 10:25:24,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:25:24,282 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;@445be44e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:25:24,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-02-05 10:25:24,285 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:25:24,285 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:25:24,286 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:25:24,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:24,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:25:24,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:24,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:24,290 INFO L85 PathProgramCache]: Analyzing trace with hash 8394, now seen corresponding path program 1 times [2024-02-05 10:25:24,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:24,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545917074] [2024-02-05 10:25:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:24,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:24,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:24,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545917074] [2024-02-05 10:25:24,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545917074] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:24,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:24,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:25:24,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881773205] [2024-02-05 10:25:24,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:24,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:25:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:25:24,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:25:24,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-02-05 10:25:24,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:24,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:24,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-02-05 10:25:24,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:24,656 INFO L124 PetriNetUnfolderBase]: 10/69 cut-off events. [2024-02-05 10:25:24,657 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-05 10:25:24,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 69 events. 10/69 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 4 based on Foata normal form. 2/59 useless extension candidates. Maximal degree in co-relation 85. Up to 27 conditions per place. [2024-02-05 10:25:24,660 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 20 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2024-02-05 10:25:24,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 143 flow [2024-02-05 10:25:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:25:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:25:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-02-05 10:25:24,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-02-05 10:25:24,674 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 90 flow. Second operand 3 states and 87 transitions. [2024-02-05 10:25:24,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 143 flow [2024-02-05 10:25:24,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 41 transitions, 133 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-05 10:25:24,686 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 82 flow [2024-02-05 10:25:24,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-02-05 10:25:24,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2024-02-05 10:25:24,696 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 82 flow [2024-02-05 10:25:24,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:24,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:24,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:25:24,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:25:24,698 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:24,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:24,699 INFO L85 PathProgramCache]: Analyzing trace with hash 250350936, now seen corresponding path program 1 times [2024-02-05 10:25:24,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:24,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985202820] [2024-02-05 10:25:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:24,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:25,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:25,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985202820] [2024-02-05 10:25:25,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985202820] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:25,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:25,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:25:25,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737108325] [2024-02-05 10:25:25,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:25,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:25:25,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:25,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:25:25,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:25:25,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-02-05 10:25:25,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:25,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:25,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-02-05 10:25:25,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:25,093 INFO L124 PetriNetUnfolderBase]: 10/65 cut-off events. [2024-02-05 10:25:25,093 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:25:25,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 65 events. 10/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 109 event pairs, 5 based on Foata normal form. 2/57 useless extension candidates. Maximal degree in co-relation 60. Up to 34 conditions per place. [2024-02-05 10:25:25,094 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 17 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-02-05 10:25:25,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 118 flow [2024-02-05 10:25:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:25:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:25:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-02-05 10:25:25,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-02-05 10:25:25,096 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 82 flow. Second operand 4 states and 97 transitions. [2024-02-05 10:25:25,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 118 flow [2024-02-05 10:25:25,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:25:25,097 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 76 flow [2024-02-05 10:25:25,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-02-05 10:25:25,098 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-02-05 10:25:25,098 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 76 flow [2024-02-05 10:25:25,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:25,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:25,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:25,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:25:25,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:25,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:25,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1475827296, now seen corresponding path program 1 times [2024-02-05 10:25:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:25,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266412688] [2024-02-05 10:25:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:25,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:25,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:25,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266412688] [2024-02-05 10:25:25,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266412688] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:25,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:25,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:25:25,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883845913] [2024-02-05 10:25:25,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:25,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:25:25,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:25,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:25:25,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:25:25,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-02-05 10:25:25,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:25,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:25,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-02-05 10:25:25,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:25,238 INFO L124 PetriNetUnfolderBase]: 10/49 cut-off events. [2024-02-05 10:25:25,238 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:25:25,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 49 events. 10/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 2 based on Foata normal form. 4/49 useless extension candidates. Maximal degree in co-relation 75. Up to 18 conditions per place. [2024-02-05 10:25:25,239 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 17 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-02-05 10:25:25,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 110 flow [2024-02-05 10:25:25,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:25:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:25:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-02-05 10:25:25,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-02-05 10:25:25,241 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 76 flow. Second operand 4 states and 94 transitions. [2024-02-05 10:25:25,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 110 flow [2024-02-05 10:25:25,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 107 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:25:25,242 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 71 flow [2024-02-05 10:25:25,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-02-05 10:25:25,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2024-02-05 10:25:25,243 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 71 flow [2024-02-05 10:25:25,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:25,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:25,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:25,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:25:25,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:25,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:25,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1864434788, now seen corresponding path program 1 times [2024-02-05 10:25:25,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:25,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324020605] [2024-02-05 10:25:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:25,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:25,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:25,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324020605] [2024-02-05 10:25:25,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324020605] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:25,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:25,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:25:25,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209490931] [2024-02-05 10:25:25,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:25,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:25:25,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:25,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:25:25,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:25:25,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-02-05 10:25:25,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:25,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:25,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-02-05 10:25:25,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:25,302 INFO L124 PetriNetUnfolderBase]: 8/44 cut-off events. [2024-02-05 10:25:25,302 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:25:25,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 44 events. 8/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 4 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 70. Up to 26 conditions per place. [2024-02-05 10:25:25,303 INFO L140 encePairwiseOnDemand]: 40/42 looper letters, 17 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2024-02-05 10:25:25,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 107 flow [2024-02-05 10:25:25,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:25:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:25:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-02-05 10:25:25,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-02-05 10:25:25,304 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 71 flow. Second operand 3 states and 82 transitions. [2024-02-05 10:25:25,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 107 flow [2024-02-05 10:25:25,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 104 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:25:25,305 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 68 flow [2024-02-05 10:25:25,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2024-02-05 10:25:25,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2024-02-05 10:25:25,306 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 68 flow [2024-02-05 10:25:25,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:25,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:25,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:25,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:25:25,307 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:25,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:25,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1864631537, now seen corresponding path program 1 times [2024-02-05 10:25:25,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:25,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810571436] [2024-02-05 10:25:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:25,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:25,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:25,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810571436] [2024-02-05 10:25:25,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810571436] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:25,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:25,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:25:25,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355810541] [2024-02-05 10:25:25,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:25,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:25:25,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:25,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:25:25,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:25:25,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-02-05 10:25:25,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:25,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:25,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-02-05 10:25:25,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:25,499 INFO L124 PetriNetUnfolderBase]: 12/54 cut-off events. [2024-02-05 10:25:25,499 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:25:25,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 54 events. 12/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 7 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 93. Up to 33 conditions per place. [2024-02-05 10:25:25,500 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 19 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-02-05 10:25:25,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 128 flow [2024-02-05 10:25:25,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-05 10:25:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-05 10:25:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-02-05 10:25:25,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-02-05 10:25:25,501 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 68 flow. Second operand 6 states and 151 transitions. [2024-02-05 10:25:25,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 128 flow [2024-02-05 10:25:25,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:25:25,502 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 91 flow [2024-02-05 10:25:25,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=91, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-02-05 10:25:25,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2024-02-05 10:25:25,503 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 91 flow [2024-02-05 10:25:25,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:25,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:25,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:25,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:25:25,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:25,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:25,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1746143910, now seen corresponding path program 1 times [2024-02-05 10:25:25,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:25,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073541419] [2024-02-05 10:25:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:25,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:25,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:25,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073541419] [2024-02-05 10:25:25,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073541419] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:25,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072470152] [2024-02-05 10:25:25,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:25,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:25,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:25,639 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) [2024-02-05 10:25:25,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-05 10:25:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:25,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-05 10:25:25,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:25,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-05 10:25:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:25,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:25,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072470152] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:25:25,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:25:25,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-02-05 10:25:25,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498501381] [2024-02-05 10:25:25,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:25:25,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:25:25,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:25,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:25:25,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:25:25,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-02-05 10:25:25,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 91 flow. Second operand has 14 states, 14 states have (on average 24.5) internal successors, (343), 14 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:25,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:25,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-02-05 10:25:25,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:26,019 INFO L124 PetriNetUnfolderBase]: 14/60 cut-off events. [2024-02-05 10:25:26,020 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-05 10:25:26,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 60 events. 14/60 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 7 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 125. Up to 33 conditions per place. [2024-02-05 10:25:26,021 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 21 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2024-02-05 10:25:26,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 161 flow [2024-02-05 10:25:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-05 10:25:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-05 10:25:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-02-05 10:25:26,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-02-05 10:25:26,022 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 91 flow. Second operand 7 states and 175 transitions. [2024-02-05 10:25:26,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 161 flow [2024-02-05 10:25:26,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:25:26,023 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 120 flow [2024-02-05 10:25:26,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=120, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2024-02-05 10:25:26,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-02-05 10:25:26,024 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 120 flow [2024-02-05 10:25:26,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.5) internal successors, (343), 14 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:26,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:26,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:26,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-05 10:25:26,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-05 10:25:26,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:26,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1328316099, now seen corresponding path program 2 times [2024-02-05 10:25:26,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:26,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052490082] [2024-02-05 10:25:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:26,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:26,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:26,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052490082] [2024-02-05 10:25:26,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052490082] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:26,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363525711] [2024-02-05 10:25:26,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:25:26,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:26,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:26,388 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:25:26,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-05 10:25:26,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-05 10:25:26,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:25:26,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-05 10:25:26,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-05 10:25:26,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-05 10:25:26,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363525711] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:26,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-05 10:25:26,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2024-02-05 10:25:26,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228833831] [2024-02-05 10:25:26,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:26,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:25:26,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:26,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:25:26,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-05 10:25:26,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-02-05 10:25:26,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:26,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:26,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-02-05 10:25:26,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:26,529 INFO L124 PetriNetUnfolderBase]: 13/58 cut-off events. [2024-02-05 10:25:26,529 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-05 10:25:26,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 58 events. 13/58 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 11 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 143. Up to 45 conditions per place. [2024-02-05 10:25:26,530 INFO L140 encePairwiseOnDemand]: 40/42 looper letters, 24 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2024-02-05 10:25:26,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 34 transitions, 168 flow [2024-02-05 10:25:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:25:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:25:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-02-05 10:25:26,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-02-05 10:25:26,531 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 120 flow. Second operand 3 states and 75 transitions. [2024-02-05 10:25:26,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 34 transitions, 168 flow [2024-02-05 10:25:26,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 34 transitions, 156 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-02-05 10:25:26,533 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 108 flow [2024-02-05 10:25:26,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2024-02-05 10:25:26,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-02-05 10:25:26,534 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 108 flow [2024-02-05 10:25:26,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:26,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:26,534 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:26,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-05 10:25:26,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-02-05 10:25:26,747 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:26,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2022276918, now seen corresponding path program 1 times [2024-02-05 10:25:26,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:26,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525949750] [2024-02-05 10:25:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:26,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-05 10:25:26,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:26,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525949750] [2024-02-05 10:25:26,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525949750] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:26,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:26,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:25:26,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481285899] [2024-02-05 10:25:26,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:26,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:25:26,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:26,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:25:26,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:25:26,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-02-05 10:25:26,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:26,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:26,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-02-05 10:25:26,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:26,855 INFO L124 PetriNetUnfolderBase]: 13/57 cut-off events. [2024-02-05 10:25:26,855 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-02-05 10:25:26,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 57 events. 13/57 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 48 event pairs, 11 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 135. Up to 45 conditions per place. [2024-02-05 10:25:26,856 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 24 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2024-02-05 10:25:26,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 160 flow [2024-02-05 10:25:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:25:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:25:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-02-05 10:25:26,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-02-05 10:25:26,858 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 108 flow. Second operand 4 states and 83 transitions. [2024-02-05 10:25:26,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 160 flow [2024-02-05 10:25:26,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 33 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:25:26,861 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 107 flow [2024-02-05 10:25:26,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2024-02-05 10:25:26,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-02-05 10:25:26,863 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 107 flow [2024-02-05 10:25:26,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:26,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:26,864 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:26,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-05 10:25:26,864 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:26,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2022276909, now seen corresponding path program 1 times [2024-02-05 10:25:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:26,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135083474] [2024-02-05 10:25:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:26,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-05 10:25:26,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:26,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135083474] [2024-02-05 10:25:26,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135083474] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:25:26,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:25:26,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:25:26,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225795649] [2024-02-05 10:25:26,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:25:26,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:25:26,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:26,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:25:26,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:25:26,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-02-05 10:25:26,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:26,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:26,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-02-05 10:25:26,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:26,940 INFO L124 PetriNetUnfolderBase]: 13/55 cut-off events. [2024-02-05 10:25:26,940 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-02-05 10:25:26,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 55 events. 13/55 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 11 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 131. Up to 46 conditions per place. [2024-02-05 10:25:26,942 INFO L140 encePairwiseOnDemand]: 40/42 looper letters, 23 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2024-02-05 10:25:26,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 31 transitions, 151 flow [2024-02-05 10:25:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:25:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:25:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-02-05 10:25:26,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-02-05 10:25:26,943 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 107 flow. Second operand 3 states and 71 transitions. [2024-02-05 10:25:26,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 31 transitions, 151 flow [2024-02-05 10:25:26,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:25:26,945 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 104 flow [2024-02-05 10:25:26,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2024-02-05 10:25:26,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-02-05 10:25:26,946 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 104 flow [2024-02-05 10:25:26,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:26,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:26,946 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:26,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:25:26,947 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:26,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1733925007, now seen corresponding path program 1 times [2024-02-05 10:25:26,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:26,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792251012] [2024-02-05 10:25:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:26,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:27,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:27,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792251012] [2024-02-05 10:25:27,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792251012] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:27,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610139893] [2024-02-05 10:25:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:27,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:27,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:27,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:25:27,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-05 10:25:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:27,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-05 10:25:27,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:27,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-05 10:25:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:27,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:27,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610139893] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:25:27,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:25:27,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-02-05 10:25:27,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438563984] [2024-02-05 10:25:27,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:25:27,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-05 10:25:27,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:27,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-05 10:25:27,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-02-05 10:25:27,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-02-05 10:25:27,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 104 flow. Second operand has 17 states, 17 states have (on average 24.235294117647058) internal successors, (412), 17 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:27,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:27,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-02-05 10:25:27,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:27,579 INFO L124 PetriNetUnfolderBase]: 16/62 cut-off events. [2024-02-05 10:25:27,579 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-02-05 10:25:27,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 62 events. 16/62 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 7 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 160. Up to 33 conditions per place. [2024-02-05 10:25:27,580 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 23 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2024-02-05 10:25:27,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 186 flow [2024-02-05 10:25:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-05 10:25:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-05 10:25:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-02-05 10:25:27,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-02-05 10:25:27,581 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 104 flow. Second operand 8 states and 199 transitions. [2024-02-05 10:25:27,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 186 flow [2024-02-05 10:25:27,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 38 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:25:27,583 INFO L231 Difference]: Finished difference. Result has 52 places, 33 transitions, 139 flow [2024-02-05 10:25:27,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=139, PETRI_PLACES=52, PETRI_TRANSITIONS=33} [2024-02-05 10:25:27,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-02-05 10:25:27,583 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 33 transitions, 139 flow [2024-02-05 10:25:27,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 24.235294117647058) internal successors, (412), 17 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:27,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:27,584 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:27,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-05 10:25:27,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:27,795 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:27,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:27,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1987849674, now seen corresponding path program 2 times [2024-02-05 10:25:27,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:27,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035768357] [2024-02-05 10:25:27,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:27,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:27,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:27,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035768357] [2024-02-05 10:25:27,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035768357] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:27,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602603049] [2024-02-05 10:25:27,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:25:27,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:27,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:27,956 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:25:27,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-05 10:25:28,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:25:28,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:25:28,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-05 10:25:28,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:28,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-05 10:25:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:28,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:28,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602603049] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:25:28,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:25:28,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-02-05 10:25:28,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661677541] [2024-02-05 10:25:28,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:25:28,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-05 10:25:28,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:28,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-05 10:25:28,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-02-05 10:25:28,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-02-05 10:25:28,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 33 transitions, 139 flow. Second operand has 20 states, 20 states have (on average 24.05) internal successors, (481), 20 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:28,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:28,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-02-05 10:25:28,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:28,474 INFO L124 PetriNetUnfolderBase]: 18/68 cut-off events. [2024-02-05 10:25:28,474 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-02-05 10:25:28,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 68 events. 18/68 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 7 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 200. Up to 33 conditions per place. [2024-02-05 10:25:28,475 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 25 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2024-02-05 10:25:28,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 41 transitions, 233 flow [2024-02-05 10:25:28,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:25:28,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:25:28,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-02-05 10:25:28,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-02-05 10:25:28,476 INFO L175 Difference]: Start difference. First operand has 52 places, 33 transitions, 139 flow. Second operand 9 states and 223 transitions. [2024-02-05 10:25:28,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 41 transitions, 233 flow [2024-02-05 10:25:28,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 41 transitions, 215 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-02-05 10:25:28,478 INFO L231 Difference]: Finished difference. Result has 57 places, 35 transitions, 163 flow [2024-02-05 10:25:28,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=163, PETRI_PLACES=57, PETRI_TRANSITIONS=35} [2024-02-05 10:25:28,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-02-05 10:25:28,479 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 35 transitions, 163 flow [2024-02-05 10:25:28,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 24.05) internal successors, (481), 20 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:28,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:28,479 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:28,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-05 10:25:28,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:28,692 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:28,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1321513203, now seen corresponding path program 3 times [2024-02-05 10:25:28,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:28,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579359045] [2024-02-05 10:25:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:28,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:29,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:29,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579359045] [2024-02-05 10:25:29,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579359045] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:29,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630387041] [2024-02-05 10:25:29,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:25:29,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:29,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:29,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:25:29,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-05 10:25:29,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-02-05 10:25:29,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:25:29,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 17 conjunts are in the unsatisfiable core [2024-02-05 10:25:29,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:29,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-05 10:25:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:29,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:29,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630387041] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:25:29,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:25:29,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-02-05 10:25:29,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430411913] [2024-02-05 10:25:29,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:25:29,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-05 10:25:29,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-05 10:25:29,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-02-05 10:25:29,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-02-05 10:25:29,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 35 transitions, 163 flow. Second operand has 23 states, 23 states have (on average 23.91304347826087) internal successors, (550), 23 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:29,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:29,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-02-05 10:25:29,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:29,570 INFO L124 PetriNetUnfolderBase]: 20/74 cut-off events. [2024-02-05 10:25:29,570 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-02-05 10:25:29,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 74 events. 20/74 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 7 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 236. Up to 33 conditions per place. [2024-02-05 10:25:29,572 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 27 selfloop transitions, 9 changer transitions 0/44 dead transitions. [2024-02-05 10:25:29,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 44 transitions, 269 flow [2024-02-05 10:25:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-05 10:25:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-05 10:25:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-02-05 10:25:29,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880952380952381 [2024-02-05 10:25:29,573 INFO L175 Difference]: Start difference. First operand has 57 places, 35 transitions, 163 flow. Second operand 10 states and 247 transitions. [2024-02-05 10:25:29,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 44 transitions, 269 flow [2024-02-05 10:25:29,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 44 transitions, 245 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-02-05 10:25:29,576 INFO L231 Difference]: Finished difference. Result has 62 places, 37 transitions, 187 flow [2024-02-05 10:25:29,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=187, PETRI_PLACES=62, PETRI_TRANSITIONS=37} [2024-02-05 10:25:29,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-02-05 10:25:29,577 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 37 transitions, 187 flow [2024-02-05 10:25:29,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 23.91304347826087) internal successors, (550), 23 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:29,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:29,577 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:29,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-05 10:25:29,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-02-05 10:25:29,789 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:29,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:29,789 INFO L85 PathProgramCache]: Analyzing trace with hash -951528336, now seen corresponding path program 4 times [2024-02-05 10:25:29,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:29,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323163577] [2024-02-05 10:25:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:29,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:30,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:30,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323163577] [2024-02-05 10:25:30,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323163577] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:30,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998712554] [2024-02-05 10:25:30,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:25:30,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:30,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:30,033 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:25:30,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-05 10:25:30,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:25:30,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:25:30,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-05 10:25:30,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:30,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-05 10:25:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:30,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:30,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998712554] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:25:30,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:25:30,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-02-05 10:25:30,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237083148] [2024-02-05 10:25:30,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:25:30,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-05 10:25:30,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:30,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-05 10:25:30,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-02-05 10:25:30,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-02-05 10:25:30,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 37 transitions, 187 flow. Second operand has 26 states, 26 states have (on average 23.807692307692307) internal successors, (619), 26 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:30,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:30,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-02-05 10:25:30,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:30,733 INFO L124 PetriNetUnfolderBase]: 22/80 cut-off events. [2024-02-05 10:25:30,733 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-02-05 10:25:30,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 80 events. 22/80 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 7 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 272. Up to 33 conditions per place. [2024-02-05 10:25:30,734 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 29 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2024-02-05 10:25:30,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 47 transitions, 305 flow [2024-02-05 10:25:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-05 10:25:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-05 10:25:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2024-02-05 10:25:30,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865800865800865 [2024-02-05 10:25:30,735 INFO L175 Difference]: Start difference. First operand has 62 places, 37 transitions, 187 flow. Second operand 11 states and 271 transitions. [2024-02-05 10:25:30,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 47 transitions, 305 flow [2024-02-05 10:25:30,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 47 transitions, 275 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-02-05 10:25:30,737 INFO L231 Difference]: Finished difference. Result has 67 places, 39 transitions, 211 flow [2024-02-05 10:25:30,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=211, PETRI_PLACES=67, PETRI_TRANSITIONS=39} [2024-02-05 10:25:30,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-02-05 10:25:30,737 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 39 transitions, 211 flow [2024-02-05 10:25:30,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 23.807692307692307) internal successors, (619), 26 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:30,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:30,738 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:30,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-05 10:25:30,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:30,949 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:30,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:30,949 INFO L85 PathProgramCache]: Analyzing trace with hash 793906349, now seen corresponding path program 5 times [2024-02-05 10:25:30,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:30,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965194890] [2024-02-05 10:25:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:30,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:31,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:31,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965194890] [2024-02-05 10:25:31,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965194890] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:31,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81538308] [2024-02-05 10:25:31,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:25:31,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:31,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:31,186 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:25:31,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-05 10:25:31,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-02-05 10:25:31,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:25:31,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-05 10:25:31,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:31,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-05 10:25:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:31,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:31,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81538308] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:25:31,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:25:31,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-02-05 10:25:31,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342993572] [2024-02-05 10:25:31,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:25:31,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-05 10:25:31,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:25:31,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-05 10:25:31,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-02-05 10:25:31,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 42 [2024-02-05 10:25:31,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 39 transitions, 211 flow. Second operand has 29 states, 29 states have (on average 23.724137931034484) internal successors, (688), 29 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:31,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:25:31,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 42 [2024-02-05 10:25:31,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:25:32,082 INFO L124 PetriNetUnfolderBase]: 24/86 cut-off events. [2024-02-05 10:25:32,082 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2024-02-05 10:25:32,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 86 events. 24/86 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 7 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 308. Up to 33 conditions per place. [2024-02-05 10:25:32,083 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 31 selfloop transitions, 11 changer transitions 0/50 dead transitions. [2024-02-05 10:25:32,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 50 transitions, 341 flow [2024-02-05 10:25:32,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-05 10:25:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-05 10:25:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 295 transitions. [2024-02-05 10:25:32,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853174603174603 [2024-02-05 10:25:32,084 INFO L175 Difference]: Start difference. First operand has 67 places, 39 transitions, 211 flow. Second operand 12 states and 295 transitions. [2024-02-05 10:25:32,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 50 transitions, 341 flow [2024-02-05 10:25:32,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 50 transitions, 305 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-02-05 10:25:32,087 INFO L231 Difference]: Finished difference. Result has 72 places, 41 transitions, 235 flow [2024-02-05 10:25:32,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=235, PETRI_PLACES=72, PETRI_TRANSITIONS=41} [2024-02-05 10:25:32,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-02-05 10:25:32,087 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 41 transitions, 235 flow [2024-02-05 10:25:32,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 23.724137931034484) internal successors, (688), 29 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:25:32,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:25:32,088 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:25:32,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-05 10:25:32,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:32,301 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:25:32,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:25:32,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1175574102, now seen corresponding path program 6 times [2024-02-05 10:25:32,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:25:32,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035965051] [2024-02-05 10:25:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:25:32,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:25:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:25:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:33,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:25:33,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035965051] [2024-02-05 10:25:33,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035965051] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:25:33,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748465585] [2024-02-05 10:25:33,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:25:33,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:25:33,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:25:33,564 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:25:33,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-05 10:25:33,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-02-05 10:25:33,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:25:33,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 62 conjunts are in the unsatisfiable core [2024-02-05 10:25:33,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:25:33,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-02-05 10:25:33,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-05 10:25:33,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-02-05 10:25:33,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-05 10:25:33,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-02-05 10:25:34,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-05 10:25:34,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-02-05 10:25:34,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-05 10:25:34,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-02-05 10:25:34,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-05 10:25:34,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-02-05 10:25:34,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-05 10:25:34,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-02-05 10:25:34,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-05 10:25:34,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-02-05 10:25:34,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-05 10:25:34,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-05 10:25:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:25:34,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:25:35,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13651746 treesize of output 13643554 [2024-02-05 10:26:48,243 WARN L293 SmtUtils]: Spent 1.21m on a formula simplification. DAG size of input: 3113 DAG size of output: 193 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-02-05 10:26:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:26:49,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748465585] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:26:49,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:26:49,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 22] total 46 [2024-02-05 10:26:49,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946959518] [2024-02-05 10:26:49,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:26:49,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-02-05 10:26:49,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:26:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-02-05 10:26:49,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=1661, Unknown=0, NotChecked=0, Total=2162 [2024-02-05 10:26:49,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-02-05 10:26:49,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 41 transitions, 235 flow. Second operand has 47 states, 47 states have (on average 13.936170212765957) internal successors, (655), 47 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:49,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:26:49,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-02-05 10:26:49,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:26:50,352 INFO L124 PetriNetUnfolderBase]: 24/83 cut-off events. [2024-02-05 10:26:50,352 INFO L125 PetriNetUnfolderBase]: For 172/172 co-relation queries the response was YES. [2024-02-05 10:26:50,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 83 events. 24/83 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 75 event pairs, 0 based on Foata normal form. 1/80 useless extension candidates. Maximal degree in co-relation 301. Up to 21 conditions per place. [2024-02-05 10:26:50,352 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 0 selfloop transitions, 0 changer transitions 49/49 dead transitions. [2024-02-05 10:26:50,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 49 transitions, 340 flow [2024-02-05 10:26:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-05 10:26:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-05 10:26:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 225 transitions. [2024-02-05 10:26:50,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-02-05 10:26:50,354 INFO L175 Difference]: Start difference. First operand has 72 places, 41 transitions, 235 flow. Second operand 15 states and 225 transitions. [2024-02-05 10:26:50,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 49 transitions, 340 flow [2024-02-05 10:26:50,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 49 transitions, 298 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-02-05 10:26:50,355 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2024-02-05 10:26:50,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2024-02-05 10:26:50,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-02-05 10:26:50,355 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2024-02-05 10:26:50,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 13.936170212765957) internal successors, (655), 47 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:26:50,358 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 17 remaining) [2024-02-05 10:26:50,359 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 17 remaining) [2024-02-05 10:26:50,359 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 17 remaining) [2024-02-05 10:26:50,359 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 17 remaining) [2024-02-05 10:26:50,359 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 17 remaining) [2024-02-05 10:26:50,359 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 17 remaining) [2024-02-05 10:26:50,359 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 17 remaining) [2024-02-05 10:26:50,359 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 17 remaining) [2024-02-05 10:26:50,359 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 17 remaining) [2024-02-05 10:26:50,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (7 of 17 remaining) [2024-02-05 10:26:50,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 17 remaining) [2024-02-05 10:26:50,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 17 remaining) [2024-02-05 10:26:50,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 17 remaining) [2024-02-05 10:26:50,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 17 remaining) [2024-02-05 10:26:50,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 17 remaining) [2024-02-05 10:26:50,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 17 remaining) [2024-02-05 10:26:50,360 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 17 remaining) [2024-02-05 10:26:50,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-02-05 10:26:50,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-05 10:26:50,573 INFO L445 BasicCegarLoop]: Path program histogram: [6, 2, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:26:50,577 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-05 10:26:50,577 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-05 10:26:50,581 INFO L503 ceAbstractionStarter]: Automizer considered 9 witness invariants [2024-02-05 10:26:50,581 INFO L504 ceAbstractionStarter]: WitnessConsidered=9 [2024-02-05 10:26:50,583 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.02 10:26:50 BasicIcfg [2024-02-05 10:26:50,583 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-05 10:26:50,583 INFO L158 Benchmark]: Toolchain (without parser) took 87908.72ms. Allocated memory was 123.7MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 90.1MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 845.2MB. Max. memory is 16.1GB. [2024-02-05 10:26:50,584 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 123.7MB. Free memory was 95.6MB in the beginning and 95.4MB in the end (delta: 241.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-05 10:26:50,584 INFO L158 Benchmark]: Witness Parser took 0.13ms. Allocated memory is still 123.7MB. Free memory is still 92.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-05 10:26:50,584 INFO L158 Benchmark]: CACSL2BoogieTranslator took 640.81ms. Allocated memory is still 123.7MB. Free memory was 89.7MB in the beginning and 50.6MB in the end (delta: 39.1MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2024-02-05 10:26:50,584 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.31ms. Allocated memory is still 123.7MB. Free memory was 50.6MB in the beginning and 48.1MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-05 10:26:50,585 INFO L158 Benchmark]: Boogie Preprocessor took 97.46ms. Allocated memory is still 123.7MB. Free memory was 48.1MB in the beginning and 91.6MB in the end (delta: -43.4MB). Peak memory consumption was 6.2MB. Max. memory is 16.1GB. [2024-02-05 10:26:50,585 INFO L158 Benchmark]: RCFGBuilder took 643.82ms. Allocated memory is still 123.7MB. Free memory was 90.9MB in the beginning and 66.7MB in the end (delta: 24.2MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. [2024-02-05 10:26:50,586 INFO L158 Benchmark]: TraceAbstraction took 86453.33ms. Allocated memory was 123.7MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 66.1MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 821.8MB. Max. memory is 16.1GB. [2024-02-05 10:26:50,588 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 123.7MB. Free memory was 95.6MB in the beginning and 95.4MB in the end (delta: 241.3kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.13ms. Allocated memory is still 123.7MB. Free memory is still 92.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 640.81ms. Allocated memory is still 123.7MB. Free memory was 89.7MB in the beginning and 50.6MB in the end (delta: 39.1MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.31ms. Allocated memory is still 123.7MB. Free memory was 50.6MB in the beginning and 48.1MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 97.46ms. Allocated memory is still 123.7MB. Free memory was 48.1MB in the beginning and 91.6MB in the end (delta: -43.4MB). Peak memory consumption was 6.2MB. Max. memory is 16.1GB. * RCFGBuilder took 643.82ms. Allocated memory is still 123.7MB. Free memory was 90.9MB in the beginning and 66.7MB in the end (delta: 24.2MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. * TraceAbstraction took 86453.33ms. Allocated memory was 123.7MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 66.1MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 821.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1111]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1112]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1116]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1116]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1117]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1122]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1107]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1107]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1107]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1107]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 59 locations, 17 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 86.3s, OverallIterations: 15, TraceHistogramMax: 8, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 578 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 526 mSDsluCounter, 990 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 955 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3177 IncrementalHoareTripleChecker+Invalid, 3217 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 35 mSDtfsCounter, 3177 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 605 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=235occurred in iteration=14, InterpolantAutomatonStates: 102, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 80.3s InterpolantComputationTime, 624 NumberOfCodeBlocks, 620 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 822 ConstructedInterpolants, 28 QuantifiedInterpolants, 7650 SizeOfPredicates, 43 NumberOfNonLiveVariables, 1790 ConjunctsInSsa, 163 ConjunctsInUnsatCore, 30 InterpolantComputations, 8 PerfectInterpolantSequences, 75/528 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-05 10:26:50,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE