./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/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/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:29:00,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:29:00,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:29:00,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:29:00,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:29:00,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:29:00,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:29:00,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:29:00,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:29:00,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:29:00,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:29:00,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:29:00,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:29:00,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:29:00,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:29:00,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:29:00,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:29:00,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:29:00,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:29:00,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:29:00,378 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:29:00,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:29:00,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:29:00,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:29:00,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:29:00,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:29:00,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:29:00,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:29:00,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:29:00,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:29:00,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:29:00,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:29:00,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:29:00,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:29:00,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:29:00,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:29:00,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:29:00,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:29:00,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:29:00,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:29:00,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:29:00,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:29:00,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:29:00,404 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:29:00,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:29:00,405 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:29:00,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:29:00,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:29:00,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:29:00,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:29:00,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:29:00,406 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:29:00,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:29:00,407 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:29:00,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:29:00,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:29:00,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:29:00,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:29:00,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:29:00,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:29:00,408 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:29:00,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:29:00,408 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:29:00,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:29:00,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:29:00,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:29:00,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:29:00,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:29:00,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:29:00,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:29:00,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:29:00,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:29:00,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:29:00,410 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:29:00,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:29:00,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:29:00,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e [2022-07-12 10:29:00,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:29:00,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:29:00,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:29:00,572 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:29:00,574 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:29:00,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-07-12 10:29:00,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1702460a7/3e478c52aa48411bb66f00bac86781a6/FLAG7e8cbb846 [2022-07-12 10:29:00,977 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:29:00,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-07-12 10:29:00,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1702460a7/3e478c52aa48411bb66f00bac86781a6/FLAG7e8cbb846 [2022-07-12 10:29:00,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1702460a7/3e478c52aa48411bb66f00bac86781a6 [2022-07-12 10:29:00,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:29:00,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:29:00,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:29:00,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:29:00,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:29:00,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:29:00" (1/1) ... [2022-07-12 10:29:00,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ae31aa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:00, skipping insertion in model container [2022-07-12 10:29:01,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:29:00" (1/1) ... [2022-07-12 10:29:01,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:29:01,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:29:01,152 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-07-12 10:29:01,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:29:01,168 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:29:01,194 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-07-12 10:29:01,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:29:01,213 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:29:01,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:01 WrapperNode [2022-07-12 10:29:01,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:29:01,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:29:01,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:29:01,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:29:01,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:01" (1/1) ... [2022-07-12 10:29:01,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:01" (1/1) ... [2022-07-12 10:29:01,250 INFO L137 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2022-07-12 10:29:01,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:29:01,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:29:01,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:29:01,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:29:01,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:01" (1/1) ... [2022-07-12 10:29:01,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:01" (1/1) ... [2022-07-12 10:29:01,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:01" (1/1) ... [2022-07-12 10:29:01,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:01" (1/1) ... [2022-07-12 10:29:01,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:01" (1/1) ... [2022-07-12 10:29:01,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:01" (1/1) ... [2022-07-12 10:29:01,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:01" (1/1) ... [2022-07-12 10:29:01,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:29:01,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:29:01,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:29:01,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:29:01,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:01" (1/1) ... [2022-07-12 10:29:01,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:29:01,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:01,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:29:01,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:29:01,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:29:01,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:29:01,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:29:01,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:29:01,329 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:29:01,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:29:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:29:01,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:29:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:29:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:29:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:29:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:29:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:29:01,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:29:01,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:29:01,332 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:29:01,386 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:29:01,387 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:29:01,556 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:29:01,655 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:29:01,655 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:29:01,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:29:01 BoogieIcfgContainer [2022-07-12 10:29:01,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:29:01,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:29:01,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:29:01,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:29:01,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:29:00" (1/3) ... [2022-07-12 10:29:01,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f43342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:29:01, skipping insertion in model container [2022-07-12 10:29:01,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:29:01" (2/3) ... [2022-07-12 10:29:01,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f43342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:29:01, skipping insertion in model container [2022-07-12 10:29:01,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:29:01" (3/3) ... [2022-07-12 10:29:01,666 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2022-07-12 10:29:01,669 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:29:01,676 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:29:01,676 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:29:01,676 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:29:01,734 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:29:01,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 254 flow [2022-07-12 10:29:01,801 INFO L129 PetriNetUnfolder]: 9/117 cut-off events. [2022-07-12 10:29:01,801 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:29:01,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-07-12 10:29:01,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 254 flow [2022-07-12 10:29:01,810 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 108 transitions, 228 flow [2022-07-12 10:29:01,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:29:01,821 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f780cb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3847ddae [2022-07-12 10:29:01,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:29:01,839 INFO L129 PetriNetUnfolder]: 9/107 cut-off events. [2022-07-12 10:29:01,840 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:29:01,840 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:01,841 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:01,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:29:01,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:01,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1729578090, now seen corresponding path program 1 times [2022-07-12 10:29:01,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:01,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559123938] [2022-07-12 10:29:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:01,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:29:02,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:02,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559123938] [2022-07-12 10:29:02,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559123938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:02,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:29:02,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:29:02,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675404218] [2022-07-12 10:29:02,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:02,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:29:02,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:02,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:29:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:29:02,198 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 119 [2022-07-12 10:29:02,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 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) [2022-07-12 10:29:02,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:02,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 119 [2022-07-12 10:29:02,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:02,315 INFO L129 PetriNetUnfolder]: 26/185 cut-off events. [2022-07-12 10:29:02,315 INFO L130 PetriNetUnfolder]: For 35/36 co-relation queries the response was YES. [2022-07-12 10:29:02,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 185 events. 26/185 cut-off events. For 35/36 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 451 event pairs, 6 based on Foata normal form. 22/193 useless extension candidates. Maximal degree in co-relation 122. Up to 39 conditions per place. [2022-07-12 10:29:02,318 INFO L132 encePairwiseOnDemand]: 104/119 looper letters, 24 selfloop transitions, 3 changer transitions 8/113 dead transitions. [2022-07-12 10:29:02,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 113 transitions, 317 flow [2022-07-12 10:29:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:29:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:29:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 661 transitions. [2022-07-12 10:29:02,329 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7935174069627852 [2022-07-12 10:29:02,329 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 661 transitions. [2022-07-12 10:29:02,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 661 transitions. [2022-07-12 10:29:02,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:02,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 661 transitions. [2022-07-12 10:29:02,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.42857142857143) internal successors, (661), 7 states have internal predecessors, (661), 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) [2022-07-12 10:29:02,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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) [2022-07-12 10:29:02,341 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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) [2022-07-12 10:29:02,343 INFO L186 Difference]: Start difference. First operand has 106 places, 108 transitions, 228 flow. Second operand 7 states and 661 transitions. [2022-07-12 10:29:02,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 113 transitions, 317 flow [2022-07-12 10:29:02,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 113 transitions, 303 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:29:02,348 INFO L242 Difference]: Finished difference. Result has 111 places, 101 transitions, 225 flow [2022-07-12 10:29:02,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=111, PETRI_TRANSITIONS=101} [2022-07-12 10:29:02,351 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 5 predicate places. [2022-07-12 10:29:02,352 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 101 transitions, 225 flow [2022-07-12 10:29:02,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 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) [2022-07-12 10:29:02,352 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:02,352 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:02,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:29:02,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:29:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:02,353 INFO L85 PathProgramCache]: Analyzing trace with hash 397909448, now seen corresponding path program 1 times [2022-07-12 10:29:02,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:02,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056830515] [2022-07-12 10:29:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:02,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:29:02,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:02,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056830515] [2022-07-12 10:29:02,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056830515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:02,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:29:02,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:29:02,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970307557] [2022-07-12 10:29:02,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:02,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:29:02,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:02,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:29:02,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:29:02,437 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-07-12 10:29:02,437 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 101 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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) [2022-07-12 10:29:02,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:02,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-07-12 10:29:02,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:02,602 INFO L129 PetriNetUnfolder]: 95/406 cut-off events. [2022-07-12 10:29:02,602 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-12 10:29:02,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 406 events. 95/406 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1805 event pairs, 42 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 654. Up to 136 conditions per place. [2022-07-12 10:29:02,607 INFO L132 encePairwiseOnDemand]: 110/119 looper letters, 37 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2022-07-12 10:29:02,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 119 transitions, 356 flow [2022-07-12 10:29:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:29:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:29:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 726 transitions. [2022-07-12 10:29:02,610 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7626050420168067 [2022-07-12 10:29:02,610 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 726 transitions. [2022-07-12 10:29:02,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 726 transitions. [2022-07-12 10:29:02,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:02,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 726 transitions. [2022-07-12 10:29:02,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.75) internal successors, (726), 8 states have internal predecessors, (726), 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) [2022-07-12 10:29:02,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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) [2022-07-12 10:29:02,620 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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) [2022-07-12 10:29:02,620 INFO L186 Difference]: Start difference. First operand has 111 places, 101 transitions, 225 flow. Second operand 8 states and 726 transitions. [2022-07-12 10:29:02,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 119 transitions, 356 flow [2022-07-12 10:29:02,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 119 transitions, 349 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-12 10:29:02,633 INFO L242 Difference]: Finished difference. Result has 111 places, 104 transitions, 254 flow [2022-07-12 10:29:02,634 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=254, PETRI_PLACES=111, PETRI_TRANSITIONS=104} [2022-07-12 10:29:02,634 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 5 predicate places. [2022-07-12 10:29:02,634 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 104 transitions, 254 flow [2022-07-12 10:29:02,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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) [2022-07-12 10:29:02,635 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:02,635 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:02,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:29:02,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:29:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:02,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1293595690, now seen corresponding path program 1 times [2022-07-12 10:29:02,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:02,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117005106] [2022-07-12 10:29:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:02,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:29:02,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:02,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117005106] [2022-07-12 10:29:02,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117005106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:29:02,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:29:02,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:29:02,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550759884] [2022-07-12 10:29:02,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:02,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:29:02,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:29:02,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:29:02,751 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-07-12 10:29:02,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 104 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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) [2022-07-12 10:29:02,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:02,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-07-12 10:29:02,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:02,863 INFO L129 PetriNetUnfolder]: 81/328 cut-off events. [2022-07-12 10:29:02,864 INFO L130 PetriNetUnfolder]: For 48/51 co-relation queries the response was YES. [2022-07-12 10:29:02,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 328 events. 81/328 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1253 event pairs, 47 based on Foata normal form. 3/306 useless extension candidates. Maximal degree in co-relation 422. Up to 144 conditions per place. [2022-07-12 10:29:02,866 INFO L132 encePairwiseOnDemand]: 110/119 looper letters, 25 selfloop transitions, 6 changer transitions 11/116 dead transitions. [2022-07-12 10:29:02,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 116 transitions, 365 flow [2022-07-12 10:29:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:29:02,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:29:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 722 transitions. [2022-07-12 10:29:02,869 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7584033613445378 [2022-07-12 10:29:02,869 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 722 transitions. [2022-07-12 10:29:02,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 722 transitions. [2022-07-12 10:29:02,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:02,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 722 transitions. [2022-07-12 10:29:02,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.25) internal successors, (722), 8 states have internal predecessors, (722), 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) [2022-07-12 10:29:02,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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) [2022-07-12 10:29:02,873 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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) [2022-07-12 10:29:02,874 INFO L186 Difference]: Start difference. First operand has 111 places, 104 transitions, 254 flow. Second operand 8 states and 722 transitions. [2022-07-12 10:29:02,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 116 transitions, 365 flow [2022-07-12 10:29:02,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:29:02,879 INFO L242 Difference]: Finished difference. Result has 116 places, 102 transitions, 248 flow [2022-07-12 10:29:02,879 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=248, PETRI_PLACES=116, PETRI_TRANSITIONS=102} [2022-07-12 10:29:02,881 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 10 predicate places. [2022-07-12 10:29:02,881 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 102 transitions, 248 flow [2022-07-12 10:29:02,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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) [2022-07-12 10:29:02,881 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:02,882 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:02,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:29:02,882 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:29:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:02,883 INFO L85 PathProgramCache]: Analyzing trace with hash -63413436, now seen corresponding path program 1 times [2022-07-12 10:29:02,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:02,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965705772] [2022-07-12 10:29:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:02,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:02,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:02,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965705772] [2022-07-12 10:29:02,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965705772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:29:02,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733221470] [2022-07-12 10:29:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:02,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:02,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:02,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:29:03,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:29:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:03,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:29:03,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:29:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:03,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:29:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:03,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733221470] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:29:03,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:29:03,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-12 10:29:03,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417522749] [2022-07-12 10:29:03,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:03,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:29:03,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:03,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:29:03,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:29:03,405 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-07-12 10:29:03,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 102 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2022-07-12 10:29:03,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:03,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-07-12 10:29:03,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:03,484 INFO L129 PetriNetUnfolder]: 70/263 cut-off events. [2022-07-12 10:29:03,485 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-07-12 10:29:03,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 263 events. 70/263 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 863 event pairs, 17 based on Foata normal form. 9/265 useless extension candidates. Maximal degree in co-relation 420. Up to 79 conditions per place. [2022-07-12 10:29:03,486 INFO L132 encePairwiseOnDemand]: 111/119 looper letters, 27 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2022-07-12 10:29:03,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 333 flow [2022-07-12 10:29:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:29:03,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:29:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2022-07-12 10:29:03,488 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7551020408163265 [2022-07-12 10:29:03,488 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2022-07-12 10:29:03,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2022-07-12 10:29:03,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:03,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2022-07-12 10:29:03,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 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) [2022-07-12 10:29:03,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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) [2022-07-12 10:29:03,492 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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) [2022-07-12 10:29:03,492 INFO L186 Difference]: Start difference. First operand has 116 places, 102 transitions, 248 flow. Second operand 7 states and 629 transitions. [2022-07-12 10:29:03,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 333 flow [2022-07-12 10:29:03,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 108 transitions, 307 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-07-12 10:29:03,494 INFO L242 Difference]: Finished difference. Result has 112 places, 104 transitions, 259 flow [2022-07-12 10:29:03,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2022-07-12 10:29:03,495 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 6 predicate places. [2022-07-12 10:29:03,495 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 259 flow [2022-07-12 10:29:03,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2022-07-12 10:29:03,496 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:03,496 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:03,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:29:03,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:03,712 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:29:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:03,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1350927880, now seen corresponding path program 1 times [2022-07-12 10:29:03,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:03,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530007081] [2022-07-12 10:29:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:03,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:03,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:03,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530007081] [2022-07-12 10:29:03,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530007081] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:29:03,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205573736] [2022-07-12 10:29:03,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:03,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:03,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:03,775 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:29:03,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:29:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:03,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:29:03,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:29:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:03,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:29:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:04,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205573736] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:29:04,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:29:04,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-12 10:29:04,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158420160] [2022-07-12 10:29:04,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:29:04,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:29:04,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:04,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:29:04,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:29:04,035 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2022-07-12 10:29:04,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 259 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2022-07-12 10:29:04,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:04,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2022-07-12 10:29:04,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:04,117 INFO L129 PetriNetUnfolder]: 59/261 cut-off events. [2022-07-12 10:29:04,117 INFO L130 PetriNetUnfolder]: For 76/90 co-relation queries the response was YES. [2022-07-12 10:29:04,118 INFO L84 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 261 events. 59/261 cut-off events. For 76/90 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 790 event pairs, 20 based on Foata normal form. 14/262 useless extension candidates. Maximal degree in co-relation 418. Up to 67 conditions per place. [2022-07-12 10:29:04,119 INFO L132 encePairwiseOnDemand]: 111/119 looper letters, 29 selfloop transitions, 7 changer transitions 0/110 dead transitions. [2022-07-12 10:29:04,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 110 transitions, 352 flow [2022-07-12 10:29:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:29:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:29:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2022-07-12 10:29:04,121 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7551020408163265 [2022-07-12 10:29:04,121 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2022-07-12 10:29:04,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2022-07-12 10:29:04,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:04,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2022-07-12 10:29:04,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 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) [2022-07-12 10:29:04,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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) [2022-07-12 10:29:04,125 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 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) [2022-07-12 10:29:04,125 INFO L186 Difference]: Start difference. First operand has 112 places, 104 transitions, 259 flow. Second operand 7 states and 629 transitions. [2022-07-12 10:29:04,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 110 transitions, 352 flow [2022-07-12 10:29:04,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 110 transitions, 343 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:29:04,129 INFO L242 Difference]: Finished difference. Result has 116 places, 105 transitions, 278 flow [2022-07-12 10:29:04,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=116, PETRI_TRANSITIONS=105} [2022-07-12 10:29:04,131 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 10 predicate places. [2022-07-12 10:29:04,131 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 105 transitions, 278 flow [2022-07-12 10:29:04,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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) [2022-07-12 10:29:04,132 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:04,132 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:04,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:29:04,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:04,348 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:29:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:04,348 INFO L85 PathProgramCache]: Analyzing trace with hash -622709836, now seen corresponding path program 1 times [2022-07-12 10:29:04,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:04,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684665297] [2022-07-12 10:29:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:04,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:29:04,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:04,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684665297] [2022-07-12 10:29:04,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684665297] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:29:04,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393721038] [2022-07-12 10:29:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:04,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:04,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:04,724 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:29:04,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:29:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:04,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-12 10:29:04,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:29:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:05,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:29:05,162 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:29:05,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-12 10:29:05,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:29:05,178 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:29:05,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-12 10:29:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:05,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393721038] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:29:05,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:29:05,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 10] total 30 [2022-07-12 10:29:05,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355740354] [2022-07-12 10:29:05,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:29:05,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 10:29:05,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:05,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 10:29:05,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-07-12 10:29:05,281 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 119 [2022-07-12 10:29:05,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 105 transitions, 278 flow. Second operand has 30 states, 30 states have (on average 51.9) internal successors, (1557), 30 states have internal predecessors, (1557), 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) [2022-07-12 10:29:05,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:05,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 119 [2022-07-12 10:29:05,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:06,401 INFO L129 PetriNetUnfolder]: 822/1752 cut-off events. [2022-07-12 10:29:06,401 INFO L130 PetriNetUnfolder]: For 1006/1006 co-relation queries the response was YES. [2022-07-12 10:29:06,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4217 conditions, 1752 events. 822/1752 cut-off events. For 1006/1006 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10701 event pairs, 136 based on Foata normal form. 2/1745 useless extension candidates. Maximal degree in co-relation 4121. Up to 486 conditions per place. [2022-07-12 10:29:06,410 INFO L132 encePairwiseOnDemand]: 96/119 looper letters, 171 selfloop transitions, 63 changer transitions 8/284 dead transitions. [2022-07-12 10:29:06,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 284 transitions, 1348 flow [2022-07-12 10:29:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 10:29:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-12 10:29:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1970 transitions. [2022-07-12 10:29:06,415 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4598506069094304 [2022-07-12 10:29:06,415 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1970 transitions. [2022-07-12 10:29:06,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1970 transitions. [2022-07-12 10:29:06,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:06,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1970 transitions. [2022-07-12 10:29:06,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 54.72222222222222) internal successors, (1970), 36 states have internal predecessors, (1970), 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) [2022-07-12 10:29:06,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 119.0) internal successors, (4403), 37 states have internal predecessors, (4403), 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) [2022-07-12 10:29:06,425 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 119.0) internal successors, (4403), 37 states have internal predecessors, (4403), 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) [2022-07-12 10:29:06,425 INFO L186 Difference]: Start difference. First operand has 116 places, 105 transitions, 278 flow. Second operand 36 states and 1970 transitions. [2022-07-12 10:29:06,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 284 transitions, 1348 flow [2022-07-12 10:29:06,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 284 transitions, 1319 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-12 10:29:06,430 INFO L242 Difference]: Finished difference. Result has 159 places, 165 transitions, 718 flow [2022-07-12 10:29:06,430 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=718, PETRI_PLACES=159, PETRI_TRANSITIONS=165} [2022-07-12 10:29:06,431 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 53 predicate places. [2022-07-12 10:29:06,431 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 165 transitions, 718 flow [2022-07-12 10:29:06,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 51.9) internal successors, (1557), 30 states have internal predecessors, (1557), 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) [2022-07-12 10:29:06,432 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:06,432 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:06,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 10:29:06,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:06,647 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:29:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:06,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1518610998, now seen corresponding path program 2 times [2022-07-12 10:29:06,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:06,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261071648] [2022-07-12 10:29:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:06,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:29:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:06,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:29:06,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261071648] [2022-07-12 10:29:06,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261071648] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:29:06,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044084270] [2022-07-12 10:29:06,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:29:06,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:06,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:29:06,961 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:29:06,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:29:07,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:29:07,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:29:07,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-12 10:29:07,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:29:07,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:29:07,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 10:29:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:07,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:29:07,513 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_127 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_127) c_~A~0.base) c_~A~0.offset) c_~counter~0)) (forall ((v_ArrVal_127 (Array Int Int))) (<= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_127) c_~A~0.base) c_~A~0.offset)))) is different from false [2022-07-12 10:29:07,534 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_127 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_127) c_~A~0.base) c_~A~0.offset) |c_thread1Thread1of1ForFork0_~tmp~0#1|)) (forall ((v_ArrVal_127 (Array Int Int))) (<= |c_thread1Thread1of1ForFork0_~tmp~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_127) c_~A~0.base) c_~A~0.offset)))) is different from false [2022-07-12 10:29:07,564 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:29:07,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2022-07-12 10:29:07,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-12 10:29:07,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 10:29:07,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:29:07,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2022-07-12 10:29:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:29:07,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044084270] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:29:07,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:29:07,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 39 [2022-07-12 10:29:07,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958787608] [2022-07-12 10:29:07,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:29:07,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 10:29:07,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:29:07,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 10:29:07,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1208, Unknown=2, NotChecked=142, Total=1482 [2022-07-12 10:29:07,942 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 119 [2022-07-12 10:29:07,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 165 transitions, 718 flow. Second operand has 39 states, 39 states have (on average 57.69230769230769) internal successors, (2250), 39 states have internal predecessors, (2250), 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) [2022-07-12 10:29:07,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:29:07,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 119 [2022-07-12 10:29:07,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:29:09,346 INFO L129 PetriNetUnfolder]: 1501/3162 cut-off events. [2022-07-12 10:29:09,346 INFO L130 PetriNetUnfolder]: For 4244/4244 co-relation queries the response was YES. [2022-07-12 10:29:09,353 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9278 conditions, 3162 events. 1501/3162 cut-off events. For 4244/4244 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 22935 event pairs, 137 based on Foata normal form. 2/3155 useless extension candidates. Maximal degree in co-relation 9231. Up to 1302 conditions per place. [2022-07-12 10:29:09,364 INFO L132 encePairwiseOnDemand]: 96/119 looper letters, 258 selfloop transitions, 84 changer transitions 8/399 dead transitions. [2022-07-12 10:29:09,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 399 transitions, 2537 flow [2022-07-12 10:29:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 10:29:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-12 10:29:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2302 transitions. [2022-07-12 10:29:09,369 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5228253463547581 [2022-07-12 10:29:09,369 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2302 transitions. [2022-07-12 10:29:09,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2302 transitions. [2022-07-12 10:29:09,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:29:09,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2302 transitions. [2022-07-12 10:29:09,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 62.21621621621622) internal successors, (2302), 37 states have internal predecessors, (2302), 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) [2022-07-12 10:29:09,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 119.0) internal successors, (4522), 38 states have internal predecessors, (4522), 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) [2022-07-12 10:29:09,380 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 119.0) internal successors, (4522), 38 states have internal predecessors, (4522), 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) [2022-07-12 10:29:09,380 INFO L186 Difference]: Start difference. First operand has 159 places, 165 transitions, 718 flow. Second operand 37 states and 2302 transitions. [2022-07-12 10:29:09,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 399 transitions, 2537 flow [2022-07-12 10:29:09,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 399 transitions, 2373 flow, removed 64 selfloop flow, removed 14 redundant places. [2022-07-12 10:29:09,395 INFO L242 Difference]: Finished difference. Result has 198 places, 236 transitions, 1368 flow [2022-07-12 10:29:09,395 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1368, PETRI_PLACES=198, PETRI_TRANSITIONS=236} [2022-07-12 10:29:09,395 INFO L279 CegarLoopForPetriNet]: 106 programPoint places, 92 predicate places. [2022-07-12 10:29:09,396 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 236 transitions, 1368 flow [2022-07-12 10:29:09,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 57.69230769230769) internal successors, (2250), 39 states have internal predecessors, (2250), 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) [2022-07-12 10:29:09,396 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:29:09,397 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:29:09,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:29:09,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:29:09,612 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:29:09,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:29:09,612 INFO L85 PathProgramCache]: Analyzing trace with hash 729652334, now seen corresponding path program 3 times [2022-07-12 10:29:09,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:29:09,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475143098] [2022-07-12 10:29:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:29:09,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:29:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:29:09,656 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:29:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:29:09,692 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:29:09,692 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:29:09,693 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-07-12 10:29:09,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-07-12 10:29:09,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-07-12 10:29:09,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:29:09,695 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-07-12 10:29:09,699 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-12 10:29:09,699 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 10:29:09,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 10:29:09 BasicIcfg [2022-07-12 10:29:09,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 10:29:09,773 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 10:29:09,773 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 10:29:09,773 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 10:29:09,773 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:29:01" (3/4) ... [2022-07-12 10:29:09,774 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-12 10:29:09,850 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-12 10:29:09,851 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 10:29:09,852 INFO L158 Benchmark]: Toolchain (without parser) took 8856.93ms. Allocated memory was 102.8MB in the beginning and 201.3MB in the end (delta: 98.6MB). Free memory was 74.7MB in the beginning and 144.0MB in the end (delta: -69.2MB). Peak memory consumption was 133.4MB. Max. memory is 16.1GB. [2022-07-12 10:29:09,853 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 102.8MB. Free memory was 61.7MB in the beginning and 61.7MB in the end (delta: 46.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 10:29:09,853 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.75ms. Allocated memory is still 102.8MB. Free memory was 74.5MB in the beginning and 77.9MB in the end (delta: -3.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 10:29:09,853 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.74ms. Allocated memory is still 102.8MB. Free memory was 77.9MB in the beginning and 76.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 10:29:09,853 INFO L158 Benchmark]: Boogie Preprocessor took 17.67ms. Allocated memory is still 102.8MB. Free memory was 75.8MB in the beginning and 74.6MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-12 10:29:09,853 INFO L158 Benchmark]: RCFGBuilder took 387.65ms. Allocated memory is still 102.8MB. Free memory was 74.6MB in the beginning and 52.8MB in the end (delta: 21.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-07-12 10:29:09,854 INFO L158 Benchmark]: TraceAbstraction took 8114.11ms. Allocated memory was 102.8MB in the beginning and 201.3MB in the end (delta: 98.6MB). Free memory was 52.4MB in the beginning and 66.1MB in the end (delta: -13.7MB). Peak memory consumption was 86.5MB. Max. memory is 16.1GB. [2022-07-12 10:29:09,854 INFO L158 Benchmark]: Witness Printer took 78.99ms. Allocated memory is still 201.3MB. Free memory was 66.1MB in the beginning and 144.0MB in the end (delta: -77.9MB). Peak memory consumption was 27.0MB. Max. memory is 16.1GB. [2022-07-12 10:29:09,855 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 102.8MB. Free memory was 61.7MB in the beginning and 61.7MB in the end (delta: 46.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 217.75ms. Allocated memory is still 102.8MB. Free memory was 74.5MB in the beginning and 77.9MB in the end (delta: -3.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.74ms. Allocated memory is still 102.8MB. Free memory was 77.9MB in the beginning and 76.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 17.67ms. Allocated memory is still 102.8MB. Free memory was 75.8MB in the beginning and 74.6MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 387.65ms. Allocated memory is still 102.8MB. Free memory was 74.6MB in the beginning and 52.8MB in the end (delta: 21.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 8114.11ms. Allocated memory was 102.8MB in the beginning and 201.3MB in the end (delta: 98.6MB). Free memory was 52.4MB in the beginning and 66.1MB in the end (delta: -13.7MB). Peak memory consumption was 86.5MB. Max. memory is 16.1GB. * Witness Printer took 78.99ms. Allocated memory is still 201.3MB. Free memory was 66.1MB in the beginning and 144.0MB in the end (delta: -77.9MB). Peak memory consumption was 27.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; VAL [A={0:0}] [L42] 0 int counter, N; VAL [A={0:0}, counter=0, N=0] [L75] 0 pthread_t t1, t2; VAL [A={0:0}, counter=0, N=0, t1={5:0}, t2={3:0}] [L77] 0 N = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, A={0:0}, counter=0, N=1, t1={5:0}, t2={3:0}] [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) VAL [\old(cond)=1, A={0:0}, cond=1, counter=0, N=1] [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) VAL [\old(cond)=1, A={0:0}, cond=1, counter=0, N=1] [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); VAL [\old(size)=1, A={0:0}, arr={-2:0}, counter=0, malloc(sizeof(int) * (size_t)size)={-2:0}, N=1, size=1] [L97] 0 int i = 0; VAL [\old(size)=1, A={0:0}, arr={-2:0}, counter=0, i=0, N=1, size=1] [L97] COND TRUE 0 i < size VAL [\old(size)=1, A={0:0}, arr={-2:0}, counter=0, i=0, N=1, size=1] [L98] 0 arr[i] = __VERIFIER_nondet_int() VAL [\old(size)=1, __VERIFIER_nondet_int()=-6, A={0:0}, arr={-2:0}, counter=0, i=0, N=1, size=1] [L97] 0 i++ VAL [\old(size)=1, A={0:0}, arr={-2:0}, counter=0, i=1, N=1, size=1] [L97] COND FALSE 0 !(i < size) VAL [\old(size)=1, A={0:0}, arr={-2:0}, counter=0, i=1, N=1, size=1] [L100] 0 return arr; VAL [\old(size)=1, \result={-2:0}, A={0:0}, arr={-2:0}, counter=0, i=1, N=1, size=1] [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) VAL [A={-2:0}, counter=0, create_fresh_int_array(N)={-2:0}, N=1, t1={5:0}, t2={3:0}] [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-2:0}, counter=0, N=1, pthread_create(&t1, 0, thread1, 0)=-1, t1={5:0}, t2={3:0}] [L49] 1 int i=0; VAL [A={-2:0}, counter=0, i=0, N=1] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L62] 2 int i=0; VAL [A={-2:0}, counter=0, i=0, N=1] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L54] 1 counter = tmp VAL [A={-2:0}, counter=-6, i=0, N=1, tmp=-6] [L49] 1 i++ VAL [A={-2:0}, counter=-6, i=1, N=1, tmp=-6] [L49] COND FALSE 1 !(i