./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-1.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_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 364d2e82c4effeb8ecaceffcae090ef10763971d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 13:15:09,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:15:09,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:15:09,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:15:09,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:15:09,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:15:09,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:15:09,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:15:09,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:15:09,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:15:09,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:15:09,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:15:09,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:15:09,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:15:09,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:15:09,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:15:09,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:15:09,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:15:09,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:15:09,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:15:09,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:15:09,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:15:09,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:15:09,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:15:09,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:15:09,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:15:09,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:15:09,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:15:09,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:15:09,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:15:09,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:15:09,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:15:09,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:15:09,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:15:09,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:15:09,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:15:09,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:15:09,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:15:09,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:15:09,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:15:09,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:15:09,451 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 13:15:09,461 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:15:09,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:15:09,462 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 13:15:09,462 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 13:15:09,462 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 13:15:09,462 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 13:15:09,462 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 13:15:09,462 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 13:15:09,462 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 13:15:09,463 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 13:15:09,463 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 13:15:09,463 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 13:15:09,463 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 13:15:09,463 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 13:15:09,463 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 13:15:09,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:15:09,464 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:15:09,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:15:09,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:15:09,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:15:09,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:15:09,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:15:09,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:15:09,465 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 13:15:09,465 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:15:09,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:15:09,465 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:15:09,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:15:09,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:15:09,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:15:09,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:15:09,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:15:09,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:15:09,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:15:09,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:15:09,466 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 13:15:09,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:15:09,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:15:09,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:15:09,467 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 13:15:09,467 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan 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 -> Taipan 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 -> 364d2e82c4effeb8ecaceffcae090ef10763971d [2019-12-07 13:15:09,570 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:15:09,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:15:09,582 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:15:09,583 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:15:09,583 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:15:09,584 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/../../sv-benchmarks/c/pthread/triangular-1.i [2019-12-07 13:15:09,621 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/data/4f5667001/4f9bf6c664e4475bae8aabe7fc01aa61/FLAGd9e75d0d1 [2019-12-07 13:15:10,025 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:15:10,026 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/sv-benchmarks/c/pthread/triangular-1.i [2019-12-07 13:15:10,036 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/data/4f5667001/4f9bf6c664e4475bae8aabe7fc01aa61/FLAGd9e75d0d1 [2019-12-07 13:15:10,044 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/data/4f5667001/4f9bf6c664e4475bae8aabe7fc01aa61 [2019-12-07 13:15:10,046 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:15:10,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:15:10,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:15:10,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:15:10,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:15:10,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3601cba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10, skipping insertion in model container [2019-12-07 13:15:10,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:15:10,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:15:10,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:15:10,311 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:15:10,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:15:10,385 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:15:10,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10 WrapperNode [2019-12-07 13:15:10,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:15:10,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:15:10,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:15:10,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:15:10,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,416 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:15:10,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:15:10,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:15:10,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:15:10,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:15:10,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:15:10,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:15:10,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:15:10,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/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 13:15:10,478 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-07 13:15:10,478 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-07 13:15:10,478 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-07 13:15:10,478 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-07 13:15:10,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 13:15:10,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-07 13:15:10,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 13:15:10,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 13:15:10,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-07 13:15:10,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:15:10,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:15:10,480 WARN L205 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-07 13:15:10,651 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:15:10,651 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 13:15:10,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:15:10 BoogieIcfgContainer [2019-12-07 13:15:10,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:15:10,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:15:10,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:15:10,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:15:10,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:15:10" (1/3) ... [2019-12-07 13:15:10,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56995620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:15:10, skipping insertion in model container [2019-12-07 13:15:10,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10" (2/3) ... [2019-12-07 13:15:10,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56995620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:15:10, skipping insertion in model container [2019-12-07 13:15:10,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:15:10" (3/3) ... [2019-12-07 13:15:10,657 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2019-12-07 13:15:10,663 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-07 13:15:10,663 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:15:10,666 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 13:15:10,667 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-07 13:15:10,683 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,683 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,683 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,683 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,684 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,684 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,684 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,684 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,684 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,684 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,684 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,685 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,685 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,685 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,685 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,685 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,685 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,685 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,685 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,686 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,686 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,686 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,686 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,686 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,686 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,686 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,686 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,687 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:15:10,702 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-07 13:15:10,715 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:15:10,715 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:15:10,715 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:15:10,715 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:15:10,715 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:15:10,715 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:15:10,715 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:15:10,715 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:15:10,723 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-07 13:15:10,725 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-07 13:15:10,750 INFO L134 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-07 13:15:10,751 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 13:15:10,754 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 92 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-07 13:15:10,756 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-07 13:15:10,764 INFO L134 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-07 13:15:10,764 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 13:15:10,765 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 92 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-07 13:15:10,767 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-07 13:15:10,767 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-07 13:15:11,425 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-07 13:15:11,426 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-07 13:15:11,428 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-07 13:15:11,434 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-07 13:15:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-07 13:15:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 13:15:11,439 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:11,440 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 13:15:11,440 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:11,444 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-07 13:15:11,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:11,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089930417] [2019-12-07 13:15:11,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:11,603 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 13:15:11,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089930417] [2019-12-07 13:15:11,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:15:11,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 13:15:11,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852889220] [2019-12-07 13:15:11,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 13:15:11,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:11,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 13:15:11,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 13:15:11,618 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-07 13:15:11,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:11,640 INFO L93 Difference]: Finished difference Result 44 states and 107 transitions. [2019-12-07 13:15:11,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 13:15:11,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-07 13:15:11,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:11,650 INFO L225 Difference]: With dead ends: 44 [2019-12-07 13:15:11,651 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 13:15:11,652 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 13:15:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 13:15:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 13:15:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 13:15:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 56 transitions. [2019-12-07 13:15:11,677 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 56 transitions. Word has length 5 [2019-12-07 13:15:11,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:11,678 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 56 transitions. [2019-12-07 13:15:11,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 13:15:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 56 transitions. [2019-12-07 13:15:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 13:15:11,679 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:11,679 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:15:11,679 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:11,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:11,679 INFO L82 PathProgramCache]: Analyzing trace with hash 232910220, now seen corresponding path program 1 times [2019-12-07 13:15:11,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:11,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158996505] [2019-12-07 13:15:11,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:11,747 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 13:15:11,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158996505] [2019-12-07 13:15:11,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:15:11,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 13:15:11,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921097338] [2019-12-07 13:15:11,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:15:11,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:11,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:15:11,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:15:11,749 INFO L87 Difference]: Start difference. First operand 26 states and 56 transitions. Second operand 4 states. [2019-12-07 13:15:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:11,782 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-07 13:15:11,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 13:15:11,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 13:15:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:11,783 INFO L225 Difference]: With dead ends: 40 [2019-12-07 13:15:11,783 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 13:15:11,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:15:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 13:15:11,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-12-07 13:15:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 13:15:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-07 13:15:11,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 7 [2019-12-07 13:15:11,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:11,788 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-07 13:15:11,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:15:11,788 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-07 13:15:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 13:15:11,789 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:11,789 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:15:11,789 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:11,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:11,789 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-07 13:15:11,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:11,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687166594] [2019-12-07 13:15:11,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:11,845 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 13:15:11,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687166594] [2019-12-07 13:15:11,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:15:11,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 13:15:11,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962242226] [2019-12-07 13:15:11,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:15:11,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:11,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:15:11,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:15:11,847 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 5 states. [2019-12-07 13:15:11,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:11,879 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-07 13:15:11,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 13:15:11,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 13:15:11,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:11,880 INFO L225 Difference]: With dead ends: 38 [2019-12-07 13:15:11,880 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 13:15:11,881 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 13:15:11,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 13:15:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-07 13:15:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 13:15:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-07 13:15:11,884 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-07 13:15:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:11,884 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-07 13:15:11,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:15:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-07 13:15:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 13:15:11,885 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:11,885 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:15:11,885 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:11,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:11,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 2 times [2019-12-07 13:15:11,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:11,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727704786] [2019-12-07 13:15:11,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:11,944 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 13:15:11,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727704786] [2019-12-07 13:15:11,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202093831] [2019-12-07 13:15:11,944 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/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 13:15:11,983 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 13:15:11,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:15:11,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 13:15:11,987 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:15:12,008 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 13:15:12,008 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:15:12,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:15:12,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:15:12,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:15:12,048 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 13:15:12,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [430449269] [2019-12-07 13:15:12,052 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) at java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1556) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:350) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 13:15:12,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:15:12,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2019-12-07 13:15:12,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186168179] [2019-12-07 13:15:12,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 13:15:12,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:12,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 13:15:12,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-12-07 13:15:12,054 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 11 states. [2019-12-07 13:15:12,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:12,149 INFO L93 Difference]: Finished difference Result 49 states and 100 transitions. [2019-12-07 13:15:12,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:15:12,150 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2019-12-07 13:15:12,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:12,150 INFO L225 Difference]: With dead ends: 49 [2019-12-07 13:15:12,150 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 13:15:12,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2019-12-07 13:15:12,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 13:15:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-12-07 13:15:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 13:15:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-07 13:15:12,154 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 10 [2019-12-07 13:15:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:12,154 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-07 13:15:12,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 13:15:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-07 13:15:12,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 13:15:12,155 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:12,155 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:15:12,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:15:12,356 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 3 times [2019-12-07 13:15:12,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:12,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151217602] [2019-12-07 13:15:12,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:12,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151217602] [2019-12-07 13:15:12,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403915218] [2019-12-07 13:15:12,512 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:15:12,582 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:15:12,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:15:12,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 13:15:12,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:15:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:12,594 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:15:12,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:15:12,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:15:12,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:15:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:12,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190027391] [2019-12-07 13:15:12,640 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) at java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1556) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:350) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 13:15:12,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:15:12,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2019-12-07 13:15:12,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688632619] [2019-12-07 13:15:12,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 13:15:12,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:12,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 13:15:12,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-07 13:15:12,641 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 14 states. [2019-12-07 13:15:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:12,754 INFO L93 Difference]: Finished difference Result 55 states and 112 transitions. [2019-12-07 13:15:12,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 13:15:12,754 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-07 13:15:12,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:12,755 INFO L225 Difference]: With dead ends: 55 [2019-12-07 13:15:12,755 INFO L226 Difference]: Without dead ends: 39 [2019-12-07 13:15:12,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2019-12-07 13:15:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-07 13:15:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2019-12-07 13:15:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 13:15:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-07 13:15:12,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 12 [2019-12-07 13:15:12,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:12,759 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-07 13:15:12,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 13:15:12,759 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-07 13:15:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 13:15:12,759 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:12,759 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:15:12,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:15:12,960 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:12,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 4 times [2019-12-07 13:15:12,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:12,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932422913] [2019-12-07 13:15:12,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:13,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932422913] [2019-12-07 13:15:13,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075259795] [2019-12-07 13:15:13,132 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:15:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:13,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 13:15:13,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:15:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:13,185 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:15:13,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:15:13,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:15:13,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:15:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:13,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651030920] [2019-12-07 13:15:13,266 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) at java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1556) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:350) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 13:15:13,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:15:13,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2019-12-07 13:15:13,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995090952] [2019-12-07 13:15:13,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 13:15:13,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:13,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 13:15:13,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-12-07 13:15:13,267 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 18 states. [2019-12-07 13:15:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:13,464 INFO L93 Difference]: Finished difference Result 61 states and 124 transitions. [2019-12-07 13:15:13,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 13:15:13,464 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-12-07 13:15:13,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:13,465 INFO L225 Difference]: With dead ends: 61 [2019-12-07 13:15:13,465 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 13:15:13,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=621, Unknown=0, NotChecked=0, Total=930 [2019-12-07 13:15:13,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 13:15:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2019-12-07 13:15:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 13:15:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-07 13:15:13,469 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 16 [2019-12-07 13:15:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:13,469 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-07 13:15:13,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 13:15:13,469 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-07 13:15:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 13:15:13,470 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:13,470 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:15:13,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:15:13,671 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:13,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:13,672 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 5 times [2019-12-07 13:15:13,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:13,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822679399] [2019-12-07 13:15:13,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:13,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822679399] [2019-12-07 13:15:13,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419837520] [2019-12-07 13:15:13,812 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:15:13,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 13:15:13,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:15:13,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 13:15:13,864 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:15:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:13,873 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:15:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:13,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:15:13,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [8] total 9 [2019-12-07 13:15:13,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106367428] [2019-12-07 13:15:13,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 13:15:13,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:13,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 13:15:13,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-07 13:15:13,893 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 8 states. [2019-12-07 13:15:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:13,901 INFO L93 Difference]: Finished difference Result 68 states and 118 transitions. [2019-12-07 13:15:13,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 13:15:13,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-07 13:15:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:13,902 INFO L225 Difference]: With dead ends: 68 [2019-12-07 13:15:13,902 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 13:15:13,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-07 13:15:13,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 13:15:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 13:15:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 13:15:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 13:15:13,903 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-12-07 13:15:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:13,903 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:15:13,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 13:15:13,903 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 13:15:13,903 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 13:15:14,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:15:14,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:15:14 BasicIcfg [2019-12-07 13:15:14,111 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:15:14,111 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:15:14,112 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:15:14,112 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:15:14,113 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:15:10" (3/4) ... [2019-12-07 13:15:14,119 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 13:15:14,138 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2019-12-07 13:15:14,138 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2019-12-07 13:15:14,149 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-12-07 13:15:14,149 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 13:15:14,149 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 13:15:14,210 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_277b3899-09fd-49d2-8bba-b643ef9e9df0/bin/utaipan/witness.graphml [2019-12-07 13:15:14,210 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:15:14,212 INFO L168 Benchmark]: Toolchain (without parser) took 4164.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 933.5 MB in the beginning and 865.1 MB in the end (delta: 68.4 MB). Peak memory consumption was 202.1 MB. Max. memory is 11.5 GB. [2019-12-07 13:15:14,212 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:15:14,213 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 933.5 MB in the beginning and 1.1 GB in the end (delta: -173.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-12-07 13:15:14,213 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.06 ms. Allocated memory is still 1.2 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 13:15:14,213 INFO L168 Benchmark]: Boogie Preprocessor took 18.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:15:14,214 INFO L168 Benchmark]: RCFGBuilder took 217.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-12-07 13:15:14,214 INFO L168 Benchmark]: TraceAbstraction took 3458.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 872.0 MB in the end (delta: 201.2 MB). Peak memory consumption was 201.2 MB. Max. memory is 11.5 GB. [2019-12-07 13:15:14,215 INFO L168 Benchmark]: Witness Printer took 98.96 ms. Allocated memory is still 1.2 GB. Free memory was 872.0 MB in the beginning and 865.1 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-12-07 13:15:14,217 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 337.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 933.5 MB in the beginning and 1.1 GB in the end (delta: -173.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.06 ms. Allocated memory is still 1.2 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 18.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 217.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3458.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 872.0 MB in the end (delta: 201.2 MB). Peak memory consumption was 201.2 MB. Max. memory is 11.5 GB. * Witness Printer took 98.96 ms. Allocated memory is still 1.2 GB. Free memory was 872.0 MB in the beginning and 865.1 MB 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: 0.7s, 53 ProgramPointsBefore, 16 ProgramPointsAfterwards, 51 TransitionsBefore, 14 TransitionsAfterwards, 740 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 380 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 604 CheckedPairsTotal, 41 TotalNumberOfCompositions - PositiveResult [Line: 703]: 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 3 procedures, 47 locations, 1 error locations. Result: SAFE, OverallTime: 3.3s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 219 SDslu, 174 SDs, 0 SdLazy, 158 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 77 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=6, 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, 7 MinimizatonAttempts, 34 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 174 ConstructedInterpolants, 0 QuantifiedInterpolants, 6892 SizeOfPredicates, 14 NumberOfNonLiveVariables, 412 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 70/138 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...