./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.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/46_monabsex2_vs.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-ext/46_monabsex2_vs.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/46_monabsex2_vs.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 19:02:47,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:02:47,947 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:02:47,953 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:02:47,953 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:02:47,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:02:47,976 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:02:47,977 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:02:47,977 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:02:47,980 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:02:47,981 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:02:47,981 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:02:47,982 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:02:47,983 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:02:47,983 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:02:47,983 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:02:47,983 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:02:47,984 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:02:47,985 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:02:47,985 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:02:47,985 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:02:47,985 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:02:47,986 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:02:47,986 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:02:47,986 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:02:47,986 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:02:47,986 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:02:47,987 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:02:47,987 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:02:47,987 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:02:47,988 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:02:47,988 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:02:47,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:02:47,989 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:02:47,989 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:02:47,989 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:02:47,989 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:02:47,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:02:47,990 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:02:47,990 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:02:47,990 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:02:47,990 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:02:47,990 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:02:47,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:02:48,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:02:48,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:02:48,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:02:48,253 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:02:48,254 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:02:48,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2024-02-07 19:02:49,492 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:02:49,692 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:02:49,692 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/46_monabsex2_vs.i [2024-02-07 19:02:49,702 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53025aee5/58b9a033c7fc4f1095a814e55c45c921/FLAGbd3089b54 [2024-02-07 19:02:49,713 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53025aee5/58b9a033c7fc4f1095a814e55c45c921 [2024-02-07 19:02:49,715 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:02:49,715 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:02:49,716 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/46_monabsex2_vs.yml/witness.yml [2024-02-07 19:02:49,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:02:49,782 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:02:49,784 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:02:49,784 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:02:49,788 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:02:49,789 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:02:49" (1/2) ... [2024-02-07 19:02:49,790 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7743cb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:49, skipping insertion in model container [2024-02-07 19:02:49,790 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:02:49" (1/2) ... [2024-02-07 19:02:49,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f592f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:02:49, skipping insertion in model container [2024-02-07 19:02:49,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:02:49" (2/2) ... [2024-02-07 19:02:49,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7743cb9a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:49, skipping insertion in model container [2024-02-07 19:02:49,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:02:49" (2/2) ... [2024-02-07 19:02:49,792 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:02:49,817 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:02:49,819 INFO L76 edCorrectnessWitness]: Location invariant before [L709-L709] s == (_Bool)1 [2024-02-07 19:02:49,819 INFO L76 edCorrectnessWitness]: Location invariant before [L708-L708] s == (_Bool)0 [2024-02-07 19:02:49,819 INFO L76 edCorrectnessWitness]: Location invariant before [L712-L712] l == (_Bool)1 [2024-02-07 19:02:49,819 INFO L76 edCorrectnessWitness]: Location invariant before [L705-L705] (s == (_Bool)0 || s == (_Bool)1) && (l == (_Bool)1 || (l == (_Bool)0 || l == (_Bool)1)) [2024-02-07 19:02:49,860 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:02:50,160 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-ext/46_monabsex2_vs.i[30494,30507] [2024-02-07 19:02:50,174 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:02:50,182 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 19:02:50,238 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-ext/46_monabsex2_vs.i[30494,30507] Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 19:02:50,242 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:02:50,270 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:02:50,272 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:02:50 WrapperNode [2024-02-07 19:02:50,272 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:02:50,274 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:02:50,274 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:02:50,274 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:02:50,280 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 07:02:50" (1/1) ... [2024-02-07 19:02:50,309 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 07:02:50" (1/1) ... [2024-02-07 19:02:50,336 INFO L138 Inliner]: procedures = 169, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2024-02-07 19:02:50,338 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:02:50,339 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:02:50,339 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:02:50,339 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:02:50,348 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 07:02:50" (1/1) ... [2024-02-07 19:02:50,348 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 07:02:50" (1/1) ... [2024-02-07 19:02:50,354 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 07:02:50" (1/1) ... [2024-02-07 19:02:50,365 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-02-07 19:02:50,366 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 07:02:50" (1/1) ... [2024-02-07 19:02:50,366 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 07:02:50" (1/1) ... [2024-02-07 19:02:50,370 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 07:02:50" (1/1) ... [2024-02-07 19:02:50,378 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 07:02:50" (1/1) ... [2024-02-07 19:02:50,380 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 07:02:50" (1/1) ... [2024-02-07 19:02:50,381 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 07:02:50" (1/1) ... [2024-02-07 19:02:50,383 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:02:50,384 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:02:50,384 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:02:50,384 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:02:50,385 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 07:02:50" (1/1) ... [2024-02-07 19:02:50,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:02:50,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:02:50,414 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 19:02:50,429 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 19:02:50,444 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-07 19:02:50,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-07 19:02:50,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:02:50,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:02:50,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 19:02:50,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:02:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:02:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:02:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:02:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:02:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 19:02:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:02:50,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:02:50,446 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 19:02:50,535 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:02:50,537 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:02:50,616 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:02:50,616 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:02:50,715 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:02:50,715 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-02-07 19:02:50,716 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:02:50 BoogieIcfgContainer [2024-02-07 19:02:50,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:02:50,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:02:50,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:02:50,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:02:50,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:02:49" (1/4) ... [2024-02-07 19:02:50,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341070f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:02:50, skipping insertion in model container [2024-02-07 19:02:50,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:02:49" (2/4) ... [2024-02-07 19:02:50,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341070f9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:02:50, skipping insertion in model container [2024-02-07 19:02:50,721 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 07:02:50" (3/4) ... [2024-02-07 19:02:50,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341070f9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:02:50, skipping insertion in model container [2024-02-07 19:02:50,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:02:50" (4/4) ... [2024-02-07 19:02:50,722 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2024-02-07 19:02:50,737 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:02:50,737 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-02-07 19:02:50,737 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:02:50,769 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:50,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 18 places, 15 transitions, 34 flow [2024-02-07 19:02:50,831 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2024-02-07 19:02:50,832 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:02:50,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 24 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2024-02-07 19:02:50,834 INFO L82 GeneralOperation]: Start removeDead. Operand has 18 places, 15 transitions, 34 flow [2024-02-07 19:02:50,840 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 18 places, 15 transitions, 34 flow [2024-02-07 19:02:50,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:50,865 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;@77e113b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:50,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-02-07 19:02:50,875 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:50,876 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-02-07 19:02:50,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:02:50,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:50,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:02:50,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 19:02:50,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:50,882 INFO L85 PathProgramCache]: Analyzing trace with hash 130784121, now seen corresponding path program 1 times [2024-02-07 19:02:50,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:50,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520070195] [2024-02-07 19:02:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:50,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:51,261 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 19:02:51,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:51,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520070195] [2024-02-07 19:02:51,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520070195] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:51,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:51,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:02:51,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401993625] [2024-02-07 19:02:51,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:51,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:51,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:51,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:51,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:51,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2024-02-07 19:02:51,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 15 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 19:02:51,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:51,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2024-02-07 19:02:51,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:51,337 INFO L124 PetriNetUnfolderBase]: 4/19 cut-off events. [2024-02-07 19:02:51,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:02:51,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 19 events. 4/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 1 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 27. Up to 10 conditions per place. [2024-02-07 19:02:51,340 INFO L140 encePairwiseOnDemand]: 7/15 looper letters, 6 selfloop transitions, 2 changer transitions 0/10 dead transitions. [2024-02-07 19:02:51,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 10 transitions, 40 flow [2024-02-07 19:02:51,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 21 transitions. [2024-02-07 19:02:51,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-02-07 19:02:51,351 INFO L175 Difference]: Start difference. First operand has 18 places, 15 transitions, 34 flow. Second operand 3 states and 21 transitions. [2024-02-07 19:02:51,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 10 transitions, 40 flow [2024-02-07 19:02:51,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 10 transitions, 40 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:02:51,354 INFO L231 Difference]: Finished difference. Result has 14 places, 9 transitions, 26 flow [2024-02-07 19:02:51,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=14, PETRI_TRANSITIONS=9} [2024-02-07 19:02:51,360 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -4 predicate places. [2024-02-07 19:02:51,360 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 9 transitions, 26 flow [2024-02-07 19:02:51,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 19:02:51,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:51,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-02-07 19:02:51,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:02:51,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 19:02:51,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:51,361 INFO L85 PathProgramCache]: Analyzing trace with hash 130784037, now seen corresponding path program 1 times [2024-02-07 19:02:51,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:51,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465907878] [2024-02-07 19:02:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:51,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:51,373 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:02:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:51,392 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:02:51,392 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:02:51,393 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2024-02-07 19:02:51,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 11 remaining) [2024-02-07 19:02:51,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (8 of 11 remaining) [2024-02-07 19:02:51,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 11 remaining) [2024-02-07 19:02:51,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 11 remaining) [2024-02-07 19:02:51,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 11 remaining) [2024-02-07 19:02:51,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 11 remaining) [2024-02-07 19:02:51,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 11 remaining) [2024-02-07 19:02:51,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 11 remaining) [2024-02-07 19:02:51,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 11 remaining) [2024-02-07 19:02:51,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 11 remaining) [2024-02-07 19:02:51,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:02:51,396 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-07 19:02:51,398 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:02:51,398 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-07 19:02:51,410 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:51,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 62 flow [2024-02-07 19:02:51,419 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2024-02-07 19:02:51,419 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 19:02:51,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 30 events. 0/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 71 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2024-02-07 19:02:51,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 62 flow [2024-02-07 19:02:51,421 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 26 transitions, 62 flow [2024-02-07 19:02:51,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:51,426 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;@77e113b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:51,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-02-07 19:02:51,431 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:51,431 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-02-07 19:02:51,432 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:02:51,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:51,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:02:51,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 19:02:51,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:51,435 INFO L85 PathProgramCache]: Analyzing trace with hash 155605981, now seen corresponding path program 1 times [2024-02-07 19:02:51,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:51,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889268740] [2024-02-07 19:02:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:51,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:51,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:51,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889268740] [2024-02-07 19:02:51,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889268740] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:51,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:51,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:02:51,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467574792] [2024-02-07 19:02:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:51,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:51,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:51,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:51,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:51,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-02-07 19:02:51,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 19:02:51,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:51,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-02-07 19:02:51,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:51,605 INFO L124 PetriNetUnfolderBase]: 106/211 cut-off events. [2024-02-07 19:02:51,605 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-02-07 19:02:51,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 211 events. 106/211 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 845 event pairs, 43 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 269. Up to 184 conditions per place. [2024-02-07 19:02:51,608 INFO L140 encePairwiseOnDemand]: 12/26 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-02-07 19:02:51,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 117 flow [2024-02-07 19:02:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-02-07 19:02:51,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-02-07 19:02:51,610 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 62 flow. Second operand 3 states and 47 transitions. [2024-02-07 19:02:51,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 117 flow [2024-02-07 19:02:51,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 117 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:02:51,611 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 81 flow [2024-02-07 19:02:51,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-02-07 19:02:51,612 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -2 predicate places. [2024-02-07 19:02:51,612 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 81 flow [2024-02-07 19:02:51,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 19:02:51,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:51,613 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2024-02-07 19:02:51,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:02:51,613 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 13 more)] === [2024-02-07 19:02:51,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:51,613 INFO L85 PathProgramCache]: Analyzing trace with hash -786880020, now seen corresponding path program 1 times [2024-02-07 19:02:51,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:51,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744401709] [2024-02-07 19:02:51,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:51,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:51,631 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:02:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:51,639 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:02:51,640 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:02:51,641 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-02-07 19:02:51,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 16 remaining) [2024-02-07 19:02:51,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (13 of 16 remaining) [2024-02-07 19:02:51,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 16 remaining) [2024-02-07 19:02:51,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 16 remaining) [2024-02-07 19:02:51,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 16 remaining) [2024-02-07 19:02:51,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 16 remaining) [2024-02-07 19:02:51,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (8 of 16 remaining) [2024-02-07 19:02:51,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 16 remaining) [2024-02-07 19:02:51,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 16 remaining) [2024-02-07 19:02:51,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 16 remaining) [2024-02-07 19:02:51,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 16 remaining) [2024-02-07 19:02:51,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 16 remaining) [2024-02-07 19:02:51,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 16 remaining) [2024-02-07 19:02:51,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 16 remaining) [2024-02-07 19:02:51,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 16 remaining) [2024-02-07 19:02:51,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:02:51,646 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-07 19:02:51,647 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:02:51,647 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-07 19:02:51,664 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:51,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 37 transitions, 92 flow [2024-02-07 19:02:51,680 INFO L124 PetriNetUnfolderBase]: 0/43 cut-off events. [2024-02-07 19:02:51,681 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-07 19:02:51,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 0/43 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 135 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2024-02-07 19:02:51,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 37 transitions, 92 flow [2024-02-07 19:02:51,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 37 transitions, 92 flow [2024-02-07 19:02:51,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:51,683 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;@77e113b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:51,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-02-07 19:02:51,686 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:51,686 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-07 19:02:51,686 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:02:51,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:51,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:02:51,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:02:51,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:51,687 INFO L85 PathProgramCache]: Analyzing trace with hash 190924876, now seen corresponding path program 1 times [2024-02-07 19:02:51,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:51,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975092234] [2024-02-07 19:02:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:51,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:51,759 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 19:02:51,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:51,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975092234] [2024-02-07 19:02:51,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975092234] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:51,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:51,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:02:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260073466] [2024-02-07 19:02:51,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:51,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:51,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:51,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:51,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 37 [2024-02-07 19:02:51,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 19:02:51,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:51,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 37 [2024-02-07 19:02:51,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:52,087 INFO L124 PetriNetUnfolderBase]: 1740/2643 cut-off events. [2024-02-07 19:02:52,087 INFO L125 PetriNetUnfolderBase]: For 281/281 co-relation queries the response was YES. [2024-02-07 19:02:52,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5465 conditions, 2643 events. 1740/2643 cut-off events. For 281/281 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 14780 event pairs, 909 based on Foata normal form. 0/1898 useless extension candidates. Maximal degree in co-relation 2129. Up to 2572 conditions per place. [2024-02-07 19:02:52,111 INFO L140 encePairwiseOnDemand]: 17/37 looper letters, 31 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2024-02-07 19:02:52,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 39 transitions, 178 flow [2024-02-07 19:02:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-02-07 19:02:52,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-02-07 19:02:52,114 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 92 flow. Second operand 3 states and 67 transitions. [2024-02-07 19:02:52,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 39 transitions, 178 flow [2024-02-07 19:02:52,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 174 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-07 19:02:52,120 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 118 flow [2024-02-07 19:02:52,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-02-07 19:02:52,122 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2024-02-07 19:02:52,122 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 118 flow [2024-02-07 19:02:52,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 19:02:52,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:52,126 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2024-02-07 19:02:52,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:02:52,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 18 more)] === [2024-02-07 19:02:52,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:52,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1492519379, now seen corresponding path program 1 times [2024-02-07 19:02:52,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:52,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797459342] [2024-02-07 19:02:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:52,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:52,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:02:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:52,174 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:02:52,175 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:02:52,175 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (20 of 21 remaining) [2024-02-07 19:02:52,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 21 remaining) [2024-02-07 19:02:52,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (18 of 21 remaining) [2024-02-07 19:02:52,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 21 remaining) [2024-02-07 19:02:52,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 21 remaining) [2024-02-07 19:02:52,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 21 remaining) [2024-02-07 19:02:52,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 21 remaining) [2024-02-07 19:02:52,175 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (13 of 21 remaining) [2024-02-07 19:02:52,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 21 remaining) [2024-02-07 19:02:52,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 21 remaining) [2024-02-07 19:02:52,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 21 remaining) [2024-02-07 19:02:52,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 21 remaining) [2024-02-07 19:02:52,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (8 of 21 remaining) [2024-02-07 19:02:52,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 21 remaining) [2024-02-07 19:02:52,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 21 remaining) [2024-02-07 19:02:52,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 21 remaining) [2024-02-07 19:02:52,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 21 remaining) [2024-02-07 19:02:52,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 21 remaining) [2024-02-07 19:02:52,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 21 remaining) [2024-02-07 19:02:52,176 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 21 remaining) [2024-02-07 19:02:52,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 21 remaining) [2024-02-07 19:02:52,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:02:52,177 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-07 19:02:52,177 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:02:52,177 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-07 19:02:52,196 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:52,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 48 transitions, 124 flow [2024-02-07 19:02:52,206 INFO L124 PetriNetUnfolderBase]: 0/56 cut-off events. [2024-02-07 19:02:52,206 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-07 19:02:52,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 56 events. 0/56 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 180 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2024-02-07 19:02:52,209 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 48 transitions, 124 flow [2024-02-07 19:02:52,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 48 transitions, 124 flow [2024-02-07 19:02:52,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:52,216 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;@77e113b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:52,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-02-07 19:02:52,218 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:52,218 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-07 19:02:52,218 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:02:52,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:52,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:02:52,219 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-07 19:02:52,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash 236741446, now seen corresponding path program 1 times [2024-02-07 19:02:52,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:52,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326090758] [2024-02-07 19:02:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:52,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:52,291 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 19:02:52,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:52,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326090758] [2024-02-07 19:02:52,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326090758] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:52,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:52,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:02:52,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947279996] [2024-02-07 19:02:52,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:52,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:52,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:52,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 48 [2024-02-07 19:02:52,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 19:02:52,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:52,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 48 [2024-02-07 19:02:52,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:54,238 INFO L124 PetriNetUnfolderBase]: 22448/30341 cut-off events. [2024-02-07 19:02:54,238 INFO L125 PetriNetUnfolderBase]: For 4271/4271 co-relation queries the response was YES. [2024-02-07 19:02:54,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62821 conditions, 30341 events. 22448/30341 cut-off events. For 4271/4271 co-relation queries the response was YES. Maximal size of possible extension queue 2086. Compared 189884 event pairs, 13349 based on Foata normal form. 0/20298 useless extension candidates. Maximal degree in co-relation 14417. Up to 30166 conditions per place. [2024-02-07 19:02:54,541 INFO L140 encePairwiseOnDemand]: 22/48 looper letters, 41 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2024-02-07 19:02:54,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 243 flow [2024-02-07 19:02:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:02:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:02:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-02-07 19:02:54,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-02-07 19:02:54,545 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 124 flow. Second operand 3 states and 87 transitions. [2024-02-07 19:02:54,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 243 flow [2024-02-07 19:02:54,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 231 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-02-07 19:02:54,550 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 155 flow [2024-02-07 19:02:54,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-02-07 19:02:54,551 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -6 predicate places. [2024-02-07 19:02:54,551 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 155 flow [2024-02-07 19:02:54,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 19:02:54,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:54,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:02:54,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:02:54,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-07 19:02:54,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash -628074484, now seen corresponding path program 1 times [2024-02-07 19:02:54,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:54,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243294996] [2024-02-07 19:02:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:54,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:02:54,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:54,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243294996] [2024-02-07 19:02:54,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243294996] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:54,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:54,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:02:54,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409388628] [2024-02-07 19:02:54,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:54,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:02:54,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:54,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:02:54,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:02:54,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 48 [2024-02-07 19:02:54,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 19:02:54,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:54,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 48 [2024-02-07 19:02:54,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:02:55,658 INFO L124 PetriNetUnfolderBase]: 9859/14143 cut-off events. [2024-02-07 19:02:55,659 INFO L125 PetriNetUnfolderBase]: For 3781/3805 co-relation queries the response was YES. [2024-02-07 19:02:55,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33977 conditions, 14143 events. 9859/14143 cut-off events. For 3781/3805 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 89955 event pairs, 5315 based on Foata normal form. 766/13476 useless extension candidates. Maximal degree in co-relation 24838. Up to 9163 conditions per place. [2024-02-07 19:02:55,746 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 37 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2024-02-07 19:02:55,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 294 flow [2024-02-07 19:02:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:02:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:02:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-02-07 19:02:55,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-02-07 19:02:55,750 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 155 flow. Second operand 4 states and 82 transitions. [2024-02-07 19:02:55,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 294 flow [2024-02-07 19:02:55,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 289 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:02:55,753 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 180 flow [2024-02-07 19:02:55,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2024-02-07 19:02:55,754 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2024-02-07 19:02:55,754 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 180 flow [2024-02-07 19:02:55,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 19:02:55,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:55,755 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2024-02-07 19:02:55,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:02:55,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-07 19:02:55,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:55,755 INFO L85 PathProgramCache]: Analyzing trace with hash 257253114, now seen corresponding path program 1 times [2024-02-07 19:02:55,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:55,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082189407] [2024-02-07 19:02:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:55,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:55,765 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:02:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:02:55,771 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:02:55,772 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:02:55,772 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (25 of 26 remaining) [2024-02-07 19:02:55,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 26 remaining) [2024-02-07 19:02:55,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (23 of 26 remaining) [2024-02-07 19:02:55,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 26 remaining) [2024-02-07 19:02:55,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 26 remaining) [2024-02-07 19:02:55,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 26 remaining) [2024-02-07 19:02:55,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 26 remaining) [2024-02-07 19:02:55,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (18 of 26 remaining) [2024-02-07 19:02:55,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 26 remaining) [2024-02-07 19:02:55,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 26 remaining) [2024-02-07 19:02:55,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 26 remaining) [2024-02-07 19:02:55,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 26 remaining) [2024-02-07 19:02:55,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (13 of 26 remaining) [2024-02-07 19:02:55,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 26 remaining) [2024-02-07 19:02:55,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 26 remaining) [2024-02-07 19:02:55,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 26 remaining) [2024-02-07 19:02:55,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 26 remaining) [2024-02-07 19:02:55,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (8 of 26 remaining) [2024-02-07 19:02:55,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 26 remaining) [2024-02-07 19:02:55,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 26 remaining) [2024-02-07 19:02:55,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 26 remaining) [2024-02-07 19:02:55,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 26 remaining) [2024-02-07 19:02:55,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 26 remaining) [2024-02-07 19:02:55,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 26 remaining) [2024-02-07 19:02:55,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 26 remaining) [2024-02-07 19:02:55,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 26 remaining) [2024-02-07 19:02:55,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 19:02:55,776 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-02-07 19:02:55,776 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 19:02:55,776 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-02-07 19:02:55,792 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 19:02:55,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 59 transitions, 158 flow [2024-02-07 19:02:55,797 INFO L124 PetriNetUnfolderBase]: 0/69 cut-off events. [2024-02-07 19:02:55,797 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-02-07 19:02:55,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 69 events. 0/69 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 243 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2024-02-07 19:02:55,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 59 transitions, 158 flow [2024-02-07 19:02:55,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 59 transitions, 158 flow [2024-02-07 19:02:55,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:02:55,799 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;@77e113b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:02:55,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-02-07 19:02:55,800 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:02:55,800 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-02-07 19:02:55,801 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 19:02:55,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:02:55,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:02:55,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:02:55,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:02:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash 293054731, now seen corresponding path program 1 times [2024-02-07 19:02:55,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:02:55,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126297982] [2024-02-07 19:02:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:02:55,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:02:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:02:55,834 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 19:02:55,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:02:55,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126297982] [2024-02-07 19:02:55,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126297982] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:02:55,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:02:55,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:02:55,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356933628] [2024-02-07 19:02:55,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:02:55,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:02:55,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:02:55,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:02:55,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:02:55,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 59 [2024-02-07 19:02:55,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 19:02:55,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:02:55,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 59 [2024-02-07 19:02:55,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:03:18,703 INFO L124 PetriNetUnfolderBase]: 252050/319325 cut-off events. [2024-02-07 19:03:18,703 INFO L125 PetriNetUnfolderBase]: For 56720/56720 co-relation queries the response was YES. [2024-02-07 19:03:19,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661680 conditions, 319325 events. 252050/319325 cut-off events. For 56720/56720 co-relation queries the response was YES. Maximal size of possible extension queue 16204. Compared 2113646 event pairs, 161615 based on Foata normal form. 0/205126 useless extension candidates. Maximal degree in co-relation 89785. Up to 318910 conditions per place. [2024-02-07 19:03:22,269 INFO L140 encePairwiseOnDemand]: 27/59 looper letters, 51 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2024-02-07 19:03:22,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 312 flow [2024-02-07 19:03:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:03:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:03:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-02-07 19:03:22,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045197740112994 [2024-02-07 19:03:22,304 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 158 flow. Second operand 3 states and 107 transitions. [2024-02-07 19:03:22,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 312 flow [2024-02-07 19:03:22,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 288 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-02-07 19:03:22,395 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 192 flow [2024-02-07 19:03:22,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2024-02-07 19:03:22,397 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -8 predicate places. [2024-02-07 19:03:22,397 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 192 flow [2024-02-07 19:03:22,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 19:03:22,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:03:22,398 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:03:22,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 19:03:22,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:03:22,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:03:22,399 INFO L85 PathProgramCache]: Analyzing trace with hash -905830234, now seen corresponding path program 1 times [2024-02-07 19:03:22,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:03:22,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677774702] [2024-02-07 19:03:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:03:22,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:03:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:03:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:03:22,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:03:22,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677774702] [2024-02-07 19:03:22,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677774702] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:03:22,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:03:22,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:03:22,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960259555] [2024-02-07 19:03:22,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:03:22,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:03:22,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:03:22,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:03:22,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:03:22,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 59 [2024-02-07 19:03:22,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 19:03:22,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:03:22,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 59 [2024-02-07 19:03:22,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:03:31,614 INFO L124 PetriNetUnfolderBase]: 88292/118343 cut-off events. [2024-02-07 19:03:31,614 INFO L125 PetriNetUnfolderBase]: For 34225/34321 co-relation queries the response was YES. [2024-02-07 19:03:31,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285385 conditions, 118343 events. 88292/118343 cut-off events. For 34225/34321 co-relation queries the response was YES. Maximal size of possible extension queue 5893. Compared 828154 event pairs, 47035 based on Foata normal form. 7930/113886 useless extension candidates. Maximal degree in co-relation 204313. Up to 72533 conditions per place. [2024-02-07 19:03:32,537 INFO L140 encePairwiseOnDemand]: 38/59 looper letters, 46 selfloop transitions, 16 changer transitions 0/68 dead transitions. [2024-02-07 19:03:32,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 366 flow [2024-02-07 19:03:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:03:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:03:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-02-07 19:03:32,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279661016949153 [2024-02-07 19:03:32,543 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 192 flow. Second operand 4 states and 101 transitions. [2024-02-07 19:03:32,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 366 flow [2024-02-07 19:03:32,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 360 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:03:32,578 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 223 flow [2024-02-07 19:03:32,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-02-07 19:03:32,582 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -10 predicate places. [2024-02-07 19:03:32,583 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 223 flow [2024-02-07 19:03:32,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 19:03:32,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:03:32,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:03:32,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 19:03:32,593 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:03:32,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:03:32,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1984022075, now seen corresponding path program 1 times [2024-02-07 19:03:32,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:03:32,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011849264] [2024-02-07 19:03:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:03:32,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:03:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:03:32,636 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 19:03:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 19:03:32,667 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 19:03:32,667 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 19:03:32,667 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 31 remaining) [2024-02-07 19:03:32,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 31 remaining) [2024-02-07 19:03:32,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (28 of 31 remaining) [2024-02-07 19:03:32,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 31 remaining) [2024-02-07 19:03:32,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (22 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (18 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (13 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 31 remaining) [2024-02-07 19:03:32,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 31 remaining) [2024-02-07 19:03:32,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 31 remaining) [2024-02-07 19:03:32,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 31 remaining) [2024-02-07 19:03:32,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (8 of 31 remaining) [2024-02-07 19:03:32,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 31 remaining) [2024-02-07 19:03:32,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 31 remaining) [2024-02-07 19:03:32,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 31 remaining) [2024-02-07 19:03:32,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 31 remaining) [2024-02-07 19:03:32,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 31 remaining) [2024-02-07 19:03:32,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 31 remaining) [2024-02-07 19:03:32,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 31 remaining) [2024-02-07 19:03:32,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 31 remaining) [2024-02-07 19:03:32,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 19:03:32,670 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-02-07 19:03:32,675 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2024-02-07 19:03:32,675 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-07 19:03:32,716 INFO L503 ceAbstractionStarter]: Automizer considered 4 witness invariants [2024-02-07 19:03:32,716 INFO L504 ceAbstractionStarter]: WitnessConsidered=4 [2024-02-07 19:03:32,725 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 07:03:32 BasicIcfg [2024-02-07 19:03:32,725 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-07 19:03:32,726 INFO L158 Benchmark]: Toolchain (without parser) took 42944.29ms. Allocated memory was 161.5MB in the beginning and 15.4GB in the end (delta: 15.2GB). Free memory was 100.0MB in the beginning and 12.4GB in the end (delta: -12.3GB). Peak memory consumption was 2.9GB. Max. memory is 16.1GB. [2024-02-07 19:03:32,726 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 161.5MB. Free memory is still 126.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 19:03:32,726 INFO L158 Benchmark]: Witness Parser took 4.36ms. Allocated memory is still 161.5MB. Free memory is still 102.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 19:03:32,726 INFO L158 Benchmark]: CACSL2BoogieTranslator took 488.52ms. Allocated memory is still 161.5MB. Free memory was 99.3MB in the beginning and 76.3MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-02-07 19:03:32,727 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.11ms. Allocated memory is still 161.5MB. Free memory was 76.3MB in the beginning and 74.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 19:03:32,727 INFO L158 Benchmark]: Boogie Preprocessor took 44.37ms. Allocated memory is still 161.5MB. Free memory was 74.8MB in the beginning and 72.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 19:03:32,727 INFO L158 Benchmark]: RCFGBuilder took 332.31ms. Allocated memory is still 161.5MB. Free memory was 72.7MB in the beginning and 56.2MB in the end (delta: 16.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-02-07 19:03:32,728 INFO L158 Benchmark]: TraceAbstraction took 42008.01ms. Allocated memory was 161.5MB in the beginning and 15.4GB in the end (delta: 15.2GB). Free memory was 55.9MB in the beginning and 12.4GB in the end (delta: -12.3GB). Peak memory consumption was 2.9GB. Max. memory is 16.1GB. [2024-02-07 19:03:32,729 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 161.5MB. Free memory is still 126.4MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 4.36ms. Allocated memory is still 161.5MB. Free memory is still 102.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 488.52ms. Allocated memory is still 161.5MB. Free memory was 99.3MB in the beginning and 76.3MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.11ms. Allocated memory is still 161.5MB. Free memory was 76.3MB in the beginning and 74.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 44.37ms. Allocated memory is still 161.5MB. Free memory was 74.8MB in the beginning and 72.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 332.31ms. Allocated memory is still 161.5MB. Free memory was 72.7MB in the beginning and 56.2MB in the end (delta: 16.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 42008.01ms. Allocated memory was 161.5MB in the beginning and 15.4GB in the end (delta: 15.2GB). Free memory was 55.9MB in the beginning and 12.4GB in the end (delta: -12.3GB). Peak memory consumption was 2.9GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 708]: invariant of correctness witness can be violated invariant of correctness witness can be violated We found a FailurePath: [L700] 0 _Bool s = 0; [L701] 0 _Bool l = 0; [L717] 0 pthread_t t; VAL [l=0, s=0, t={3:0}] [L718] COND TRUE 0 1 [L718] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [arg={0:0}, l=0, s=0, t={3:0}] [L705] 1 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[LOGICOR,BinaryExpression[COMPEQ,IdentifierExpression[s],CastExpression[ACSLType[_Bool],IntegerLiteral[0]]],BinaryExpression[COMPEQ,IdentifierExpression[s],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]]],BinaryExpression[LOGICOR,BinaryExpression[COMPEQ,IdentifierExpression[l],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]],BinaryExpression[LOGICOR,BinaryExpression[COMPEQ,IdentifierExpression[l],CastExpression[ACSLType[_Bool],IntegerLiteral[0]]],BinaryExpression[COMPEQ,IdentifierExpression[l],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]]]]]]] [L705] COND FALSE 1 !(!(!l || s)) VAL [arg={0:0}, arg={0:0}, l=0, s=0] [L718] COND TRUE 0 1 [L718] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [arg={0:0}, arg={0:0}, l=0, s=0, t={3:0}] [L705] 2 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[LOGICOR,BinaryExpression[COMPEQ,IdentifierExpression[s],CastExpression[ACSLType[_Bool],IntegerLiteral[0]]],BinaryExpression[COMPEQ,IdentifierExpression[s],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]]],BinaryExpression[LOGICOR,BinaryExpression[COMPEQ,IdentifierExpression[l],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]],BinaryExpression[LOGICOR,BinaryExpression[COMPEQ,IdentifierExpression[l],CastExpression[ACSLType[_Bool],IntegerLiteral[0]]],BinaryExpression[COMPEQ,IdentifierExpression[l],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]]]]]]] [L705] COND FALSE 2 !(!(!l || s)) VAL [arg={0:0}, arg={0:0}, l=0, s=0] [L708] 1 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,IdentifierExpression[s],CastExpression[ACSLType[_Bool],IntegerLiteral[0]]]]] [L708] 1 s = s || 1 [L709] 1 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,IdentifierExpression[s],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]]]] VAL [arg={0:0}, arg={0:0}, l=0, s=1] [L708] 2 CodeAnnotStmt[Assertion[BinaryExpression[COMPEQ,IdentifierExpression[s],CastExpression[ACSLType[_Bool],IntegerLiteral[0]]]]] VAL [arg={0:0}, arg={0:0}, l=0, s=1] - UnprovableResult [Line: 705]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 705]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 709]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 27 locations, 11 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11 IncrementalHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 11 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 28 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 38 locations, 16 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34 IncrementalHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 0 mSDtfsCounter, 34 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 28 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 49 locations, 21 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50 IncrementalHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 0 mSDtfsCounter, 50 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 28 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 60 locations, 26 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.6s, OverallIterations: 3, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 41 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 46 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 134 IncrementalHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 46 mSolverCounterUnsat, 0 mSDtfsCounter, 134 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=180occurred in iteration=2, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 113 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 71 locations, 31 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 36.9s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 36.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 57 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 166 IncrementalHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 0 mSDtfsCounter, 166 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=2, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 113 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-02-07 19:03:32,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE