./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.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/bigshot_s.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec 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.2024-02-07_10-47-16.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-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 18:59:25,476 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 18:59:25,572 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 18:59:25,577 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 18:59:25,578 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 18:59:25,611 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 18:59:25,612 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 18:59:25,612 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 18:59:25,613 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 18:59:25,616 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 18:59:25,617 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 18:59:25,617 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 18:59:25,619 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 18:59:25,620 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 18:59:25,620 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 18:59:25,621 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 18:59:25,621 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 18:59:25,621 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 18:59:25,621 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 18:59:25,622 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 18:59:25,622 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 18:59:25,622 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 18:59:25,623 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 18:59:25,623 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 18:59:25,623 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 18:59:25,624 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 18:59:25,624 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 18:59:25,625 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 18:59:25,625 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 18:59:25,626 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 18:59:25,627 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 18:59:25,627 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 18:59:25,627 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 18:59:25,628 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 18:59:25,628 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 18:59:25,628 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 18:59:25,629 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 18:59:25,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 18:59:25,629 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 18:59:25,629 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 18:59:25,630 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 18:59:25,630 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 18:59:25,630 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 18:59:25,630 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 18:59:25,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 18:59:25,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 18:59:25,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 18:59:25,904 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 18:59:25,905 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 18:59:25,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s.i [2024-02-07 18:59:27,133 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 18:59:27,462 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 18:59:27,463 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i [2024-02-07 18:59:27,494 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ca1f2de7/b457d8f972ca4911a5ab3877996fe978/FLAGd55cce153 [2024-02-07 18:59:27,511 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ca1f2de7/b457d8f972ca4911a5ab3877996fe978 [2024-02-07 18:59:27,514 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 18:59:27,515 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 18:59:27,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/bigshot_s.yml/witness.yml [2024-02-07 18:59:27,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 18:59:27,592 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 18:59:27,594 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 18:59:27,594 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 18:59:27,599 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 18:59:27,600 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 06:59:27" (1/2) ... [2024-02-07 18:59:27,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb8413a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27, skipping insertion in model container [2024-02-07 18:59:27,601 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 06:59:27" (1/2) ... [2024-02-07 18:59:27,603 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@62dee4dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27, skipping insertion in model container [2024-02-07 18:59:27,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 06:59:27" (2/2) ... [2024-02-07 18:59:27,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb8413a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:27, skipping insertion in model container [2024-02-07 18:59:27,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 06:59:27" (2/2) ... [2024-02-07 18:59:27,604 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 18:59:27,639 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 18:59:27,641 INFO L76 edCorrectnessWitness]: Location invariant before [L1107-L1107] ((0 <= expression) && (expression <= 1)) && (expression == 0 || expression == 1) [2024-02-07 18:59:27,695 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 18:59:28,110 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] [2024-02-07 18:59:28,138 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 18:59:28,149 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 18:59:28,240 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] [2024-02-07 18:59:28,246 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 18:59:28,351 INFO L211 MainTranslator]: Completed translation [2024-02-07 18:59:28,351 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28 WrapperNode [2024-02-07 18:59:28,351 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 18:59:28,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 18:59:28,369 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 18:59:28,369 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 18:59:28,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (1/1) ... [2024-02-07 18:59:28,420 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (1/1) ... [2024-02-07 18:59:28,463 INFO L138 Inliner]: procedures = 323, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2024-02-07 18:59:28,463 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 18:59:28,464 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 18:59:28,465 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 18:59:28,465 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 18:59:28,475 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (1/1) ... [2024-02-07 18:59:28,475 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (1/1) ... [2024-02-07 18:59:28,488 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (1/1) ... [2024-02-07 18:59:28,511 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 9, 2, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-02-07 18:59:28,511 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (1/1) ... [2024-02-07 18:59:28,511 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (1/1) ... [2024-02-07 18:59:28,517 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (1/1) ... [2024-02-07 18:59:28,530 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (1/1) ... [2024-02-07 18:59:28,534 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (1/1) ... [2024-02-07 18:59:28,536 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (1/1) ... [2024-02-07 18:59:28,543 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 18:59:28,544 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 18:59:28,544 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 18:59:28,544 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 18:59:28,545 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (1/1) ... [2024-02-07 18:59:28,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 18:59:28,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:28,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 18:59:28,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 18:59:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 18:59:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 18:59:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-02-07 18:59:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-02-07 18:59:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-02-07 18:59:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-02-07 18:59:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2024-02-07 18:59:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 18:59:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 18:59:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 18:59:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 18:59:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 18:59:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 18:59:28,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 18:59:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 18:59:28,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 18:59:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 18:59:28,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 18:59:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 18:59:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 18:59:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 18:59:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-07 18:59:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 18:59:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 18:59:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 18:59:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 18:59:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 18:59:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 18:59:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 18:59:28,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 18:59:28,631 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 18:59:28,803 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 18:59:28,805 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 18:59:29,009 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 18:59:29,009 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 18:59:29,116 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 18:59:29,117 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-02-07 18:59:29,117 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 06:59:29 BoogieIcfgContainer [2024-02-07 18:59:29,117 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 18:59:29,120 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 18:59:29,120 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 18:59:29,123 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 18:59:29,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 06:59:27" (1/4) ... [2024-02-07 18:59:29,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4161cf2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 06:59:29, skipping insertion in model container [2024-02-07 18:59:29,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 06:59:27" (2/4) ... [2024-02-07 18:59:29,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4161cf2d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 06:59:29, skipping insertion in model container [2024-02-07 18:59:29,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:28" (3/4) ... [2024-02-07 18:59:29,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4161cf2d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 06:59:29, skipping insertion in model container [2024-02-07 18:59:29,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 06:59:29" (4/4) ... [2024-02-07 18:59:29,127 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2024-02-07 18:59:29,145 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 18:59:29,145 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-07 18:59:29,145 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 18:59:29,210 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 18:59:29,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 70 flow [2024-02-07 18:59:29,282 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-02-07 18:59:29,282 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 18:59:29,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-02-07 18:59:29,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 70 flow [2024-02-07 18:59:29,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 23 transitions, 58 flow [2024-02-07 18:59:29,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 18:59:29,315 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;@2b75ed4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 18:59:29,315 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-07 18:59:29,323 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 18:59:29,324 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-02-07 18:59:29,324 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 18:59:29,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:29,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:29,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 18:59:29,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:29,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1049714513, now seen corresponding path program 1 times [2024-02-07 18:59:29,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:29,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141783722] [2024-02-07 18:59:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:29,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:29,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:29,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141783722] [2024-02-07 18:59:29,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141783722] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:29,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:29,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 18:59:29,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962968205] [2024-02-07 18:59:29,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:29,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 18:59:29,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:29,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 18:59:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 18:59:29,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2024-02-07 18:59:29,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:29,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:29,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2024-02-07 18:59:29,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:29,801 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2024-02-07 18:59:29,802 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 18:59:29,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 33 events. 7/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 4 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 48. Up to 23 conditions per place. [2024-02-07 18:59:29,804 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 15 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2024-02-07 18:59:29,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 88 flow [2024-02-07 18:59:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 18:59:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 18:59:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-02-07 18:59:29,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-02-07 18:59:29,819 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 58 flow. Second operand 3 states and 45 transitions. [2024-02-07 18:59:29,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 88 flow [2024-02-07 18:59:29,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 22 transitions, 80 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 18:59:29,824 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 48 flow [2024-02-07 18:59:29,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2024-02-07 18:59:29,829 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2024-02-07 18:59:29,830 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 48 flow [2024-02-07 18:59:29,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:29,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:29,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:29,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 18:59:29,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 18:59:29,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1005811443, now seen corresponding path program 1 times [2024-02-07 18:59:29,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:29,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548039533] [2024-02-07 18:59:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:29,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:30,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:30,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548039533] [2024-02-07 18:59:30,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548039533] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:30,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:30,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 18:59:30,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529854950] [2024-02-07 18:59:30,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:30,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 18:59:30,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:30,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 18:59:30,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 18:59:30,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2024-02-07 18:59:30,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:30,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:30,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2024-02-07 18:59:30,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:30,385 INFO L124 PetriNetUnfolderBase]: 11/43 cut-off events. [2024-02-07 18:59:30,385 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 18:59:30,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 43 events. 11/43 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 6 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 72. Up to 29 conditions per place. [2024-02-07 18:59:30,387 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 17 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2024-02-07 18:59:30,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 104 flow [2024-02-07 18:59:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 18:59:30,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 18:59:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-02-07 18:59:30,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-02-07 18:59:30,415 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 48 flow. Second operand 6 states and 77 transitions. [2024-02-07 18:59:30,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 104 flow [2024-02-07 18:59:30,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 18:59:30,417 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 71 flow [2024-02-07 18:59:30,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=71, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-02-07 18:59:30,418 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2024-02-07 18:59:30,418 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 71 flow [2024-02-07 18:59:30,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:30,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:30,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:30,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 18:59:30,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 18:59:30,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:30,420 INFO L85 PathProgramCache]: Analyzing trace with hash 756573666, now seen corresponding path program 1 times [2024-02-07 18:59:30,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:30,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535040588] [2024-02-07 18:59:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:30,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535040588] [2024-02-07 18:59:30,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535040588] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76599275] [2024-02-07 18:59:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:30,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:30,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:30,756 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 18:59:30,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 18:59:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:30,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 18:59:30,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:31,029 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 [2024-02-07 18:59:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:31,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:31,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76599275] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:31,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:31,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-02-07 18:59:31,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520140568] [2024-02-07 18:59:31,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:31,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 18:59:31,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:31,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 18:59:31,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-02-07 18:59:31,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2024-02-07 18:59:31,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 71 flow. Second operand has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 14 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:31,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:31,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2024-02-07 18:59:31,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:31,272 INFO L124 PetriNetUnfolderBase]: 13/49 cut-off events. [2024-02-07 18:59:31,273 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-07 18:59:31,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 49 events. 13/49 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 6 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 104. Up to 29 conditions per place. [2024-02-07 18:59:31,274 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 19 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2024-02-07 18:59:31,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 137 flow [2024-02-07 18:59:31,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 18:59:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 18:59:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-02-07 18:59:31,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2024-02-07 18:59:31,279 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 71 flow. Second operand 7 states and 89 transitions. [2024-02-07 18:59:31,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 137 flow [2024-02-07 18:59:31,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 18:59:31,283 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 100 flow [2024-02-07 18:59:31,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2024-02-07 18:59:31,284 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2024-02-07 18:59:31,284 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 100 flow [2024-02-07 18:59:31,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 14 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:31,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:31,285 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:31,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:31,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:31,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 18:59:31,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:31,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1229251611, now seen corresponding path program 2 times [2024-02-07 18:59:31,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:31,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542397610] [2024-02-07 18:59:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:31,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:31,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:31,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542397610] [2024-02-07 18:59:31,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542397610] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:31,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002945304] [2024-02-07 18:59:31,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 18:59:31,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:31,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:31,754 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) [2024-02-07 18:59:31,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 18:59:31,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 18:59:31,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 18:59:31,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 18:59:31,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-07 18:59:31,891 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 18:59:31,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002945304] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:31,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 18:59:31,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2024-02-07 18:59:31,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938515870] [2024-02-07 18:59:31,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:31,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 18:59:31,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:31,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 18:59:31,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 18:59:31,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-02-07 18:59:31,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:31,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:31,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-02-07 18:59:31,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:31,938 INFO L124 PetriNetUnfolderBase]: 12/47 cut-off events. [2024-02-07 18:59:31,939 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-07 18:59:31,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 47 events. 12/47 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 10 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 121. Up to 41 conditions per place. [2024-02-07 18:59:31,940 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 21 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2024-02-07 18:59:31,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 25 transitions, 142 flow [2024-02-07 18:59:31,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 18:59:31,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 18:59:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2024-02-07 18:59:31,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-02-07 18:59:31,942 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 100 flow. Second operand 3 states and 39 transitions. [2024-02-07 18:59:31,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 25 transitions, 142 flow [2024-02-07 18:59:31,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 25 transitions, 130 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-02-07 18:59:31,944 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 88 flow [2024-02-07 18:59:31,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2024-02-07 18:59:31,945 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2024-02-07 18:59:31,945 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 88 flow [2024-02-07 18:59:31,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:31,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:31,946 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] [2024-02-07 18:59:31,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-07 18:59:32,163 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,SelfDestructingSolverStorable3 [2024-02-07 18:59:32,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 18:59:32,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:32,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2089465299, now seen corresponding path program 1 times [2024-02-07 18:59:32,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:32,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829400895] [2024-02-07 18:59:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:32,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:32,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:32,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829400895] [2024-02-07 18:59:32,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829400895] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:32,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035600949] [2024-02-07 18:59:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:32,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:32,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:32,441 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) [2024-02-07 18:59:32,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 18:59:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:32,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 18:59:32,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:32,680 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 [2024-02-07 18:59:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:32,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:32,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035600949] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:32,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:32,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-02-07 18:59:32,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758199948] [2024-02-07 18:59:32,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:32,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 18:59:32,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 18:59:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-02-07 18:59:32,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2024-02-07 18:59:32,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 88 flow. Second operand has 17 states, 17 states have (on average 11.882352941176471) internal successors, (202), 17 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:32,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:32,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2024-02-07 18:59:32,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:33,000 INFO L124 PetriNetUnfolderBase]: 15/54 cut-off events. [2024-02-07 18:59:33,001 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-02-07 18:59:33,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 54 events. 15/54 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 6 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 142. Up to 29 conditions per place. [2024-02-07 18:59:33,003 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 21 selfloop transitions, 7 changer transitions 0/32 dead transitions. [2024-02-07 18:59:33,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 166 flow [2024-02-07 18:59:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 18:59:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 18:59:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-02-07 18:59:33,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2024-02-07 18:59:33,006 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 88 flow. Second operand 8 states and 101 transitions. [2024-02-07 18:59:33,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 166 flow [2024-02-07 18:59:33,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 32 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 18:59:33,010 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 123 flow [2024-02-07 18:59:33,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=123, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2024-02-07 18:59:33,012 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 15 predicate places. [2024-02-07 18:59:33,012 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 123 flow [2024-02-07 18:59:33,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.882352941176471) internal successors, (202), 17 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:33,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:33,013 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] [2024-02-07 18:59:33,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:33,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:33,232 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 18:59:33,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:33,232 INFO L85 PathProgramCache]: Analyzing trace with hash -505033042, now seen corresponding path program 2 times [2024-02-07 18:59:33,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:33,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062204382] [2024-02-07 18:59:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:33,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:33,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:33,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062204382] [2024-02-07 18:59:33,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062204382] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:33,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131723096] [2024-02-07 18:59:33,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 18:59:33,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:33,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:33,488 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) [2024-02-07 18:59:33,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 18:59:33,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 18:59:33,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 18:59:33,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 18:59:33,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:33,721 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 [2024-02-07 18:59:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:33,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:33,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131723096] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:33,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:33,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-02-07 18:59:33,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708396618] [2024-02-07 18:59:33,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:33,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 18:59:33,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:33,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 18:59:33,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-02-07 18:59:33,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2024-02-07 18:59:33,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 123 flow. Second operand has 20 states, 20 states have (on average 11.75) internal successors, (235), 20 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:33,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:33,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2024-02-07 18:59:33,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:34,087 INFO L124 PetriNetUnfolderBase]: 17/60 cut-off events. [2024-02-07 18:59:34,087 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-02-07 18:59:34,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 60 events. 17/60 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 6 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 180. Up to 29 conditions per place. [2024-02-07 18:59:34,090 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 23 selfloop transitions, 8 changer transitions 0/35 dead transitions. [2024-02-07 18:59:34,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 35 transitions, 213 flow [2024-02-07 18:59:34,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 18:59:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 18:59:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-02-07 18:59:34,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-02-07 18:59:34,093 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 123 flow. Second operand 9 states and 113 transitions. [2024-02-07 18:59:34,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 35 transitions, 213 flow [2024-02-07 18:59:34,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 35 transitions, 195 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-02-07 18:59:34,100 INFO L231 Difference]: Finished difference. Result has 47 places, 29 transitions, 147 flow [2024-02-07 18:59:34,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=147, PETRI_PLACES=47, PETRI_TRANSITIONS=29} [2024-02-07 18:59:34,103 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2024-02-07 18:59:34,103 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 29 transitions, 147 flow [2024-02-07 18:59:34,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.75) internal successors, (235), 20 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:34,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:34,104 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] [2024-02-07 18:59:34,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:34,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:34,320 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 18:59:34,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:34,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1994045041, now seen corresponding path program 3 times [2024-02-07 18:59:34,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:34,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578451309] [2024-02-07 18:59:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:34,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:34,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:34,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578451309] [2024-02-07 18:59:34,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578451309] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:34,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349354895] [2024-02-07 18:59:34,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 18:59:34,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:34,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:34,689 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) [2024-02-07 18:59:34,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 18:59:34,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-02-07 18:59:34,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 18:59:34,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2024-02-07 18:59:34,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:34,980 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 [2024-02-07 18:59:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:34,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:35,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349354895] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:35,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:35,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-02-07 18:59:35,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621392554] [2024-02-07 18:59:35,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:35,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 18:59:35,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:35,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 18:59:35,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-02-07 18:59:35,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2024-02-07 18:59:35,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 29 transitions, 147 flow. Second operand has 23 states, 23 states have (on average 11.652173913043478) internal successors, (268), 23 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:35,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:35,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2024-02-07 18:59:35,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:35,413 INFO L124 PetriNetUnfolderBase]: 19/66 cut-off events. [2024-02-07 18:59:35,414 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-02-07 18:59:35,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 66 events. 19/66 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 6 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 216. Up to 29 conditions per place. [2024-02-07 18:59:35,421 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 25 selfloop transitions, 9 changer transitions 0/38 dead transitions. [2024-02-07 18:59:35,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 38 transitions, 249 flow [2024-02-07 18:59:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 18:59:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 18:59:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-02-07 18:59:35,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-02-07 18:59:35,423 INFO L175 Difference]: Start difference. First operand has 47 places, 29 transitions, 147 flow. Second operand 10 states and 125 transitions. [2024-02-07 18:59:35,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 38 transitions, 249 flow [2024-02-07 18:59:35,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 38 transitions, 225 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-02-07 18:59:35,431 INFO L231 Difference]: Finished difference. Result has 52 places, 31 transitions, 171 flow [2024-02-07 18:59:35,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=171, PETRI_PLACES=52, PETRI_TRANSITIONS=31} [2024-02-07 18:59:35,431 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2024-02-07 18:59:35,432 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 31 transitions, 171 flow [2024-02-07 18:59:35,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.652173913043478) internal successors, (268), 23 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:35,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:35,433 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] [2024-02-07 18:59:35,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:35,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:35,650 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 18:59:35,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:35,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1573602956, now seen corresponding path program 4 times [2024-02-07 18:59:35,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:35,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780269082] [2024-02-07 18:59:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:35,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:35,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:35,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780269082] [2024-02-07 18:59:35,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780269082] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:35,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927595382] [2024-02-07 18:59:35,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 18:59:35,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:35,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:35,970 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) [2024-02-07 18:59:35,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 18:59:36,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 18:59:36,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 18:59:36,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-07 18:59:36,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:36,316 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 [2024-02-07 18:59:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:36,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:36,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927595382] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:36,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:36,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-02-07 18:59:36,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621633476] [2024-02-07 18:59:36,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:36,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-07 18:59:36,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:36,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-07 18:59:36,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-02-07 18:59:36,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2024-02-07 18:59:36,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 31 transitions, 171 flow. Second operand has 26 states, 26 states have (on average 11.576923076923077) internal successors, (301), 26 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:36,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:36,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2024-02-07 18:59:36,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:36,892 INFO L124 PetriNetUnfolderBase]: 21/72 cut-off events. [2024-02-07 18:59:36,892 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-02-07 18:59:36,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 72 events. 21/72 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 6 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 252. Up to 29 conditions per place. [2024-02-07 18:59:36,893 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 27 selfloop transitions, 10 changer transitions 0/41 dead transitions. [2024-02-07 18:59:36,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 41 transitions, 285 flow [2024-02-07 18:59:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 18:59:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 18:59:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-02-07 18:59:36,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-02-07 18:59:36,895 INFO L175 Difference]: Start difference. First operand has 52 places, 31 transitions, 171 flow. Second operand 11 states and 137 transitions. [2024-02-07 18:59:36,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 41 transitions, 285 flow [2024-02-07 18:59:36,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 41 transitions, 255 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-02-07 18:59:36,898 INFO L231 Difference]: Finished difference. Result has 57 places, 33 transitions, 195 flow [2024-02-07 18:59:36,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=195, PETRI_PLACES=57, PETRI_TRANSITIONS=33} [2024-02-07 18:59:36,899 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2024-02-07 18:59:36,899 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 33 transitions, 195 flow [2024-02-07 18:59:36,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 11.576923076923077) internal successors, (301), 26 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:36,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:36,899 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] [2024-02-07 18:59:36,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:37,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:37,101 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 18:59:37,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:37,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1595541431, now seen corresponding path program 5 times [2024-02-07 18:59:37,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:37,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657085366] [2024-02-07 18:59:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:37,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:37,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:37,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657085366] [2024-02-07 18:59:37,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657085366] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:37,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199480187] [2024-02-07 18:59:37,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 18:59:37,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:37,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:37,473 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) [2024-02-07 18:59:37,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 18:59:37,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-02-07 18:59:37,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 18:59:37,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-07 18:59:37,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:37,977 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 [2024-02-07 18:59:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:37,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:38,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199480187] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:38,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:38,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-02-07 18:59:38,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501517209] [2024-02-07 18:59:38,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:38,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-07 18:59:38,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-07 18:59:38,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-02-07 18:59:38,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2024-02-07 18:59:38,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 33 transitions, 195 flow. Second operand has 29 states, 29 states have (on average 11.517241379310345) internal successors, (334), 29 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:38,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:38,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2024-02-07 18:59:38,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:38,635 INFO L124 PetriNetUnfolderBase]: 23/78 cut-off events. [2024-02-07 18:59:38,635 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2024-02-07 18:59:38,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 78 events. 23/78 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 6 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 288. Up to 29 conditions per place. [2024-02-07 18:59:38,636 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 29 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2024-02-07 18:59:38,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 44 transitions, 321 flow [2024-02-07 18:59:38,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 18:59:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 18:59:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-02-07 18:59:38,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-02-07 18:59:38,641 INFO L175 Difference]: Start difference. First operand has 57 places, 33 transitions, 195 flow. Second operand 12 states and 149 transitions. [2024-02-07 18:59:38,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 44 transitions, 321 flow [2024-02-07 18:59:38,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 44 transitions, 285 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-02-07 18:59:38,646 INFO L231 Difference]: Finished difference. Result has 62 places, 35 transitions, 219 flow [2024-02-07 18:59:38,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=219, PETRI_PLACES=62, PETRI_TRANSITIONS=35} [2024-02-07 18:59:38,647 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 35 predicate places. [2024-02-07 18:59:38,647 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 35 transitions, 219 flow [2024-02-07 18:59:38,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 11.517241379310345) internal successors, (334), 29 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:38,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:38,648 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] [2024-02-07 18:59:38,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:38,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:38,860 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 18:59:38,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2011484474, now seen corresponding path program 6 times [2024-02-07 18:59:38,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:38,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331674922] [2024-02-07 18:59:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:38,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:40,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:40,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331674922] [2024-02-07 18:59:40,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331674922] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:40,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408741984] [2024-02-07 18:59:40,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 18:59:40,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:40,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:40,365 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) [2024-02-07 18:59:40,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 18:59:40,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-02-07 18:59:40,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 18:59:40,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 51 conjunts are in the unsatisfiable core [2024-02-07 18:59:40,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:40,667 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 [2024-02-07 18:59:40,739 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 [2024-02-07 18:59:40,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-07 18:59:40,786 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 [2024-02-07 18:59:40,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-07 18:59:40,836 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 [2024-02-07 18:59:40,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-07 18:59:40,889 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 [2024-02-07 18:59:40,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-07 18:59:40,951 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 [2024-02-07 18:59:41,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-07 18:59:41,009 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 [2024-02-07 18:59:41,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-07 18:59:41,069 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 [2024-02-07 18:59:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:41,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:08:25,923 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 421134378 treesize of output 420872234 [2024-02-07 19:11:06,303 WARN L293 SmtUtils]: Spent 2.67m on a formula simplification. DAG size of input: 8812 DAG size of output: 492 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15