./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-divine/condvar.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-divine/condvar.i -s /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 608daa6125fca7edb704aa4fad695d54b285441b ................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 12:28:22,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 12:28:22,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 12:28:22,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 12:28:22,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 12:28:22,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 12:28:22,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 12:28:22,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 12:28:22,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 12:28:22,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 12:28:22,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 12:28:22,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 12:28:22,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 12:28:22,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 12:28:22,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 12:28:22,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 12:28:22,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 12:28:22,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 12:28:22,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 12:28:22,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 12:28:22,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 12:28:22,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 12:28:22,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 12:28:22,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 12:28:22,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 12:28:22,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 12:28:22,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 12:28:22,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 12:28:22,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 12:28:22,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 12:28:22,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 12:28:22,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 12:28:22,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 12:28:22,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 12:28:22,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 12:28:22,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 12:28:22,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 12:28:22,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 12:28:22,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 12:28:22,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 12:28:22,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 12:28:22,614 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 12:28:22,623 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 12:28:22,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 12:28:22,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 12:28:22,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 12:28:22,624 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 12:28:22,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 12:28:22,624 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 12:28:22,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 12:28:22,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 12:28:22,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 12:28:22,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 12:28:22,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 12:28:22,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 12:28:22,625 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 12:28:22,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 12:28:22,626 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 12:28:22,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 12:28:22,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 12:28:22,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 12:28:22,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 12:28:22,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 12:28:22,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 12:28:22,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 12:28:22,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 12:28:22,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 12:28:22,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 12:28:22,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 12:28:22,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 12:28:22,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 12:28:22,628 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer 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(__VERIFIER_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 -> 608daa6125fca7edb704aa4fad695d54b285441b [2019-12-07 12:28:22,729 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 12:28:22,740 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 12:28:22,743 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 12:28:22,744 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 12:28:22,744 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 12:28:22,745 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/../../sv-benchmarks/c/pthread-divine/condvar.i [2019-12-07 12:28:22,790 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/data/469141ccc/1cecbdea1fb541b7ae785e32bc7f89de/FLAG88d6e678b [2019-12-07 12:28:23,162 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 12:28:23,163 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/sv-benchmarks/c/pthread-divine/condvar.i [2019-12-07 12:28:23,172 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/data/469141ccc/1cecbdea1fb541b7ae785e32bc7f89de/FLAG88d6e678b [2019-12-07 12:28:23,181 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/data/469141ccc/1cecbdea1fb541b7ae785e32bc7f89de [2019-12-07 12:28:23,182 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 12:28:23,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 12:28:23,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 12:28:23,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 12:28:23,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 12:28:23,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:28:23" (1/1) ... [2019-12-07 12:28:23,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25bc6ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23, skipping insertion in model container [2019-12-07 12:28:23,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:28:23" (1/1) ... [2019-12-07 12:28:23,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 12:28:23,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 12:28:23,358 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2019-12-07 12:28:23,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:28:23,465 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 12:28:23,475 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2019-12-07 12:28:23,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:28:23,540 INFO L208 MainTranslator]: Completed translation [2019-12-07 12:28:23,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23 WrapperNode [2019-12-07 12:28:23,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 12:28:23,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 12:28:23,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 12:28:23,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 12:28:23,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23" (1/1) ... [2019-12-07 12:28:23,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23" (1/1) ... [2019-12-07 12:28:23,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 12:28:23,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 12:28:23,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 12:28:23,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 12:28:23,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23" (1/1) ... [2019-12-07 12:28:23,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23" (1/1) ... [2019-12-07 12:28:23,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23" (1/1) ... [2019-12-07 12:28:23,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23" (1/1) ... [2019-12-07 12:28:23,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23" (1/1) ... [2019-12-07 12:28:23,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23" (1/1) ... [2019-12-07 12:28:23,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23" (1/1) ... [2019-12-07 12:28:23,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 12:28:23,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 12:28:23,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 12:28:23,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 12:28:23,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 12:28:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 12:28:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 12:28:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2019-12-07 12:28:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 12:28:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 12:28:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-12-07 12:28:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2019-12-07 12:28:23,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2019-12-07 12:28:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 12:28:23,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 12:28:23,635 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-07 12:28:23,814 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 12:28:23,814 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 12:28:23,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:28:23 BoogieIcfgContainer [2019-12-07 12:28:23,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 12:28:23,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 12:28:23,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 12:28:23,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 12:28:23,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:28:23" (1/3) ... [2019-12-07 12:28:23,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@319097c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:28:23, skipping insertion in model container [2019-12-07 12:28:23,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:23" (2/3) ... [2019-12-07 12:28:23,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@319097c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:28:23, skipping insertion in model container [2019-12-07 12:28:23,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:28:23" (3/3) ... [2019-12-07 12:28:23,820 INFO L109 eAbstractionObserver]: Analyzing ICFG condvar.i [2019-12-07 12:28:23,826 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-07 12:28:23,826 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 12:28:23,830 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 12:28:23,831 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-07 12:28:23,845 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 12:28:23,846 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 12:28:23,846 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 12:28:23,846 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 12:28:23,846 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 12:28:23,846 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 12:28:23,847 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 12:28:23,847 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 12:28:23,847 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 12:28:23,847 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 12:28:23,860 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-07 12:28:23,872 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 12:28:23,872 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 12:28:23,872 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 12:28:23,872 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 12:28:23,872 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 12:28:23,873 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 12:28:23,873 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 12:28:23,873 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 12:28:23,880 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 59 transitions [2019-12-07 12:28:23,882 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions [2019-12-07 12:28:23,907 INFO L134 PetriNetUnfolder]: 5/58 cut-off events. [2019-12-07 12:28:23,907 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 12:28:23,911 INFO L76 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 58 events. 5/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 75 event pairs. 6/58 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2019-12-07 12:28:23,912 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions [2019-12-07 12:28:23,922 INFO L134 PetriNetUnfolder]: 5/58 cut-off events. [2019-12-07 12:28:23,922 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 12:28:23,923 INFO L76 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 58 events. 5/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 75 event pairs. 6/58 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2019-12-07 12:28:23,924 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 352 [2019-12-07 12:28:23,925 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-07 12:28:24,641 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2019-12-07 12:28:24,950 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2019-12-07 12:28:25,045 INFO L206 etLargeBlockEncoding]: Checked pairs total: 294 [2019-12-07 12:28:25,045 INFO L214 etLargeBlockEncoding]: Total number of compositions: 50 [2019-12-07 12:28:25,047 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 12 transitions [2019-12-07 12:28:25,052 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 16 states. [2019-12-07 12:28:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-12-07 12:28:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 12:28:25,057 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:28:25,058 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 12:28:25,058 INFO L410 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:28:25,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:28:25,062 INFO L82 PathProgramCache]: Analyzing trace with hash 7366572, now seen corresponding path program 1 times [2019-12-07 12:28:25,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:28:25,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844665781] [2019-12-07 12:28:25,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:28:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:28:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:28:25,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844665781] [2019-12-07 12:28:25,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:28:25,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 12:28:25,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121885186] [2019-12-07 12:28:25,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 12:28:25,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:28:25,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 12:28:25,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 12:28:25,215 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2019-12-07 12:28:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:28:25,232 INFO L93 Difference]: Finished difference Result 12 states and 18 transitions. [2019-12-07 12:28:25,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 12:28:25,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 12:28:25,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:28:25,240 INFO L225 Difference]: With dead ends: 12 [2019-12-07 12:28:25,240 INFO L226 Difference]: Without dead ends: 9 [2019-12-07 12:28:25,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 12:28:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-12-07 12:28:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-12-07 12:28:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 12:28:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 15 transitions. [2019-12-07 12:28:25,262 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 15 transitions. Word has length 4 [2019-12-07 12:28:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:28:25,262 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 15 transitions. [2019-12-07 12:28:25,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 12:28:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 15 transitions. [2019-12-07 12:28:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 12:28:25,263 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:28:25,263 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 12:28:25,263 INFO L410 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:28:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:28:25,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1511130461, now seen corresponding path program 1 times [2019-12-07 12:28:25,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:28:25,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874239597] [2019-12-07 12:28:25,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:28:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:28:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:28:25,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874239597] [2019-12-07 12:28:25,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:28:25,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 12:28:25,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429561469] [2019-12-07 12:28:25,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 12:28:25,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:28:25,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 12:28:25,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 12:28:25,301 INFO L87 Difference]: Start difference. First operand 9 states and 15 transitions. Second operand 3 states. [2019-12-07 12:28:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:28:25,307 INFO L93 Difference]: Finished difference Result 11 states and 19 transitions. [2019-12-07 12:28:25,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 12:28:25,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 12:28:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:28:25,307 INFO L225 Difference]: With dead ends: 11 [2019-12-07 12:28:25,308 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 12:28:25,308 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 12:28:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 12:28:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 12:28:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 12:28:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 19 transitions. [2019-12-07 12:28:25,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 19 transitions. Word has length 6 [2019-12-07 12:28:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:28:25,310 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 19 transitions. [2019-12-07 12:28:25,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 12:28:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 19 transitions. [2019-12-07 12:28:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 12:28:25,311 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:28:25,311 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:28:25,311 INFO L410 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:28:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:28:25,311 INFO L82 PathProgramCache]: Analyzing trace with hash 399613212, now seen corresponding path program 1 times [2019-12-07 12:28:25,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:28:25,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062974498] [2019-12-07 12:28:25,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:28:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:28:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:28:25,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062974498] [2019-12-07 12:28:25,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541426105] [2019-12-07 12:28:25,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:28:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:28:25,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 12:28:25,386 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:28:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:28:25,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:28:25,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-07 12:28:25,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874052503] [2019-12-07 12:28:25,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 12:28:25,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:28:25,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 12:28:25,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 12:28:25,401 INFO L87 Difference]: Start difference. First operand 11 states and 19 transitions. Second operand 5 states. [2019-12-07 12:28:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:28:25,412 INFO L93 Difference]: Finished difference Result 13 states and 23 transitions. [2019-12-07 12:28:25,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 12:28:25,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-12-07 12:28:25,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:28:25,413 INFO L225 Difference]: With dead ends: 13 [2019-12-07 12:28:25,413 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 12:28:25,413 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 12:28:25,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 12:28:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 12:28:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 12:28:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 23 transitions. [2019-12-07 12:28:25,415 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 23 transitions. Word has length 7 [2019-12-07 12:28:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:28:25,415 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 23 transitions. [2019-12-07 12:28:25,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 12:28:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 23 transitions. [2019-12-07 12:28:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 12:28:25,416 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:28:25,416 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-07 12:28:25,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:28:25,617 INFO L410 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:28:25,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:28:25,617 INFO L82 PathProgramCache]: Analyzing trace with hash -496875069, now seen corresponding path program 2 times [2019-12-07 12:28:25,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:28:25,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932577038] [2019-12-07 12:28:25,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:28:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:28:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:28:25,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932577038] [2019-12-07 12:28:25,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:28:25,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 12:28:25,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743240516] [2019-12-07 12:28:25,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 12:28:25,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:28:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 12:28:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 12:28:25,721 INFO L87 Difference]: Start difference. First operand 13 states and 23 transitions. Second operand 4 states. [2019-12-07 12:28:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:28:25,738 INFO L93 Difference]: Finished difference Result 12 states and 22 transitions. [2019-12-07 12:28:25,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 12:28:25,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 12:28:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:28:25,739 INFO L225 Difference]: With dead ends: 12 [2019-12-07 12:28:25,740 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 12:28:25,740 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 12:28:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 12:28:25,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 12:28:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 12:28:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 12:28:25,742 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2019-12-07 12:28:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:28:25,742 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 12:28:25,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 12:28:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 12:28:25,743 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 12:28:25,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:28:25 BasicIcfg [2019-12-07 12:28:25,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 12:28:25,749 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 12:28:25,749 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 12:28:25,749 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 12:28:25,750 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:28:23" (3/4) ... [2019-12-07 12:28:25,754 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 12:28:25,762 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread [2019-12-07 12:28:25,766 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-12-07 12:28:25,766 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 12:28:25,767 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 12:28:25,804 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_78ef8962-d648-438e-926e-b8659d13dd3d/bin/uautomizer/witness.graphml [2019-12-07 12:28:25,804 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 12:28:25,806 INFO L168 Benchmark]: Toolchain (without parser) took 2622.04 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.1 MB). Free memory was 940.9 MB in the beginning and 1.0 GB in the end (delta: -62.0 MB). Peak memory consumption was 27.1 MB. Max. memory is 11.5 GB. [2019-12-07 12:28:25,806 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:28:25,807 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.93 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.1 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -126.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-12-07 12:28:25,807 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.81 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 12:28:25,807 INFO L168 Benchmark]: Boogie Preprocessor took 18.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:28:25,808 INFO L168 Benchmark]: RCFGBuilder took 224.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 28.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 11.5 GB. [2019-12-07 12:28:25,808 INFO L168 Benchmark]: TraceAbstraction took 1932.32 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-12-07 12:28:25,808 INFO L168 Benchmark]: Witness Printer took 55.70 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-12-07 12:28:25,811 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 356.93 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.1 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -126.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.81 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 224.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 28.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1932.32 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * Witness Printer took 55.70 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.1s, 58 ProgramPointsBefore, 13 ProgramPointsAfterwards, 59 TransitionsBefore, 12 TransitionsAfterwards, 352 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 190 VarBasedMoverChecksPositive, 9 VarBasedMoverChecksNegative, 3 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 294 CheckedPairsTotal, 50 TotalNumberOfCompositions - PositiveResult [Line: 695]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 55 locations, 1 error locations. Result: SAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 38 SDtfs, 13 SDslu, 24 SDs, 0 SdLazy, 23 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 463 SizeOfPredicates, 1 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 3/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...