./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe027_tso.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe027_tso.opt.i -s /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a867433c875ea6727c2cf004441bbef7e177744a .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 20:44:49,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:44:49,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:44:49,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:44:49,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:44:49,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:44:49,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:44:49,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:44:49,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:44:49,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:44:49,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:44:49,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:44:49,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:44:49,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:44:49,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:44:49,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:44:49,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:44:49,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:44:49,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:44:49,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:44:49,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:44:49,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:44:49,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:44:49,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:44:49,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:44:49,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:44:49,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:44:49,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:44:49,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:44:49,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:44:49,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:44:49,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:44:49,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:44:49,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:44:49,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:44:49,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:44:49,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:44:49,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:44:49,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:44:49,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:44:49,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:44:49,690 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 20:44:49,713 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:44:49,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:44:49,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:44:49,715 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:44:49,715 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:44:49,715 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:44:49,715 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:44:49,715 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:44:49,715 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:44:49,716 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:44:49,716 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:44:49,716 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:44:49,716 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:44:49,716 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:44:49,716 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:44:49,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:44:49,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:44:49,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:44:49,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:44:49,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:44:49,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 20:44:49,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:44:49,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 20:44:49,718 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:44:49,719 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:44:49,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 20:44:49,719 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:44:49,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 20:44:49,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:44:49,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:44:49,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:44:49,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:44:49,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:44:49,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 20:44:49,720 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:44:49,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:44:49,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 20:44:49,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:44:49,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:44:49,721 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a867433c875ea6727c2cf004441bbef7e177744a [2020-12-09 20:44:49,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:44:49,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:44:49,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:44:49,935 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:44:49,936 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:44:49,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe027_tso.opt.i [2020-12-09 20:44:49,977 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan/data/bf018757d/227a4dce78864a45908a87b9f0e227da/FLAGa29ba4735 [2020-12-09 20:44:50,388 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:44:50,388 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/sv-benchmarks/c/pthread-wmm/safe027_tso.opt.i [2020-12-09 20:44:50,401 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan/data/bf018757d/227a4dce78864a45908a87b9f0e227da/FLAGa29ba4735 [2020-12-09 20:44:50,413 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan/data/bf018757d/227a4dce78864a45908a87b9f0e227da [2020-12-09 20:44:50,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:44:50,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:44:50,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:44:50,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:44:50,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:44:50,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:44:50" (1/1) ... [2020-12-09 20:44:50,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69be5779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50, skipping insertion in model container [2020-12-09 20:44:50,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:44:50" (1/1) ... [2020-12-09 20:44:50,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:44:50,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:44:50,570 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/sv-benchmarks/c/pthread-wmm/safe027_tso.opt.i[949,962] [2020-12-09 20:44:50,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:44:50,666 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:44:50,675 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/sv-benchmarks/c/pthread-wmm/safe027_tso.opt.i[949,962] [2020-12-09 20:44:50,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:44:50,755 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:44:50,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50 WrapperNode [2020-12-09 20:44:50,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:44:50,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:44:50,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:44:50,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:44:50,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50" (1/1) ... [2020-12-09 20:44:50,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50" (1/1) ... [2020-12-09 20:44:50,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:44:50,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:44:50,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:44:50,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:44:50,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50" (1/1) ... [2020-12-09 20:44:50,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50" (1/1) ... [2020-12-09 20:44:50,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50" (1/1) ... [2020-12-09 20:44:50,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50" (1/1) ... [2020-12-09 20:44:50,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50" (1/1) ... [2020-12-09 20:44:50,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50" (1/1) ... [2020-12-09 20:44:50,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50" (1/1) ... [2020-12-09 20:44:50,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:44:50,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:44:50,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:44:50,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:44:50,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/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 [2020-12-09 20:44:50,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 20:44:50,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-09 20:44:50,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:44:50,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 20:44:50,872 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-09 20:44:50,873 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-09 20:44:50,873 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-09 20:44:50,873 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-09 20:44:50,873 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-12-09 20:44:50,873 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-12-09 20:44:50,873 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2020-12-09 20:44:50,873 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2020-12-09 20:44:50,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 20:44:50,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-09 20:44:50,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:44:50,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:44:50,875 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-09 20:44:51,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:44:51,110 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 20:44:51,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:44:51 BoogieIcfgContainer [2020-12-09 20:44:51,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:44:51,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:44:51,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:44:51,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:44:51,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:44:50" (1/3) ... [2020-12-09 20:44:51,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436b27fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:44:51, skipping insertion in model container [2020-12-09 20:44:51,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:44:50" (2/3) ... [2020-12-09 20:44:51,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436b27fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:44:51, skipping insertion in model container [2020-12-09 20:44:51,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:44:51" (3/3) ... [2020-12-09 20:44:51,117 INFO L111 eAbstractionObserver]: Analyzing ICFG safe027_tso.opt.i [2020-12-09 20:44:51,126 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-09 20:44:51,127 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:44:51,129 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 20:44:51,129 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-09 20:44:51,151 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,151 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,151 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,151 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,151 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,151 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,152 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,152 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,152 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,152 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,152 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,152 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,153 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,153 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,153 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,153 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,153 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,153 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,153 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,153 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,154 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,154 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,154 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,154 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,154 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,155 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,155 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,155 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,155 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,155 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,156 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,156 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,156 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,156 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,156 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,156 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,157 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,157 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,157 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,157 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,157 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,157 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,157 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,157 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,158 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,158 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,158 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,158 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,160 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,160 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,160 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,160 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,164 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,164 WARN L313 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,164 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,164 WARN L313 ript$VariableManager]: TermVariabe P3Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,166 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,166 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,166 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,166 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,168 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,168 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,168 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,168 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 20:44:51,169 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-09 20:44:51,177 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-09 20:44:51,191 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:44:51,191 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 20:44:51,191 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:44:51,191 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:44:51,191 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:44:51,192 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:44:51,192 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:44:51,192 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:44:51,200 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-09 20:44:51,202 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 87 transitions, 194 flow [2020-12-09 20:44:51,204 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 87 transitions, 194 flow [2020-12-09 20:44:51,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 98 places, 87 transitions, 194 flow [2020-12-09 20:44:51,237 INFO L129 PetriNetUnfolder]: 2/83 cut-off events. [2020-12-09 20:44:51,237 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-09 20:44:51,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 83 events. 2/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2020-12-09 20:44:51,243 INFO L116 LiptonReduction]: Number of co-enabled transitions 1866 [2020-12-09 20:44:53,359 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-09 20:44:53,545 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-09 20:44:53,761 INFO L131 LiptonReduction]: Checked pairs total: 3161 [2020-12-09 20:44:53,761 INFO L133 LiptonReduction]: Total number of compositions: 72 [2020-12-09 20:44:53,765 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 25 transitions, 70 flow [2020-12-09 20:44:53,795 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 706 states. [2020-12-09 20:44:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states. [2020-12-09 20:44:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 20:44:53,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:53,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:53,803 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:44:53,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:53,806 INFO L82 PathProgramCache]: Analyzing trace with hash -545263439, now seen corresponding path program 1 times [2020-12-09 20:44:53,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:44:53,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014187807] [2020-12-09 20:44:53,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:44:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:53,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014187807] [2020-12-09 20:44:53,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:44:53,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:44:53,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389417176] [2020-12-09 20:44:53,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:44:53,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:44:54,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:44:54,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:44:54,003 INFO L87 Difference]: Start difference. First operand 706 states. Second operand 3 states. [2020-12-09 20:44:54,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:54,046 INFO L93 Difference]: Finished difference Result 832 states and 2781 transitions. [2020-12-09 20:44:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:44:54,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-09 20:44:54,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:54,061 INFO L225 Difference]: With dead ends: 832 [2020-12-09 20:44:54,062 INFO L226 Difference]: Without dead ends: 553 [2020-12-09 20:44:54,062 INFO L677 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 [2020-12-09 20:44:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-12-09 20:44:54,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2020-12-09 20:44:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-12-09 20:44:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1851 transitions. [2020-12-09 20:44:54,126 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1851 transitions. Word has length 10 [2020-12-09 20:44:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:54,127 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 1851 transitions. [2020-12-09 20:44:54,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:44:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1851 transitions. [2020-12-09 20:44:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 20:44:54,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:54,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:54,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 20:44:54,129 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:44:54,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:54,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1160874164, now seen corresponding path program 1 times [2020-12-09 20:44:54,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:44:54,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757426375] [2020-12-09 20:44:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:44:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:54,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757426375] [2020-12-09 20:44:54,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:44:54,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:44:54,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496049172] [2020-12-09 20:44:54,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:44:54,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:44:54,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:44:54,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:44:54,183 INFO L87 Difference]: Start difference. First operand 553 states and 1851 transitions. Second operand 3 states. [2020-12-09 20:44:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:54,192 INFO L93 Difference]: Finished difference Result 526 states and 1743 transitions. [2020-12-09 20:44:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:44:54,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-09 20:44:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:54,197 INFO L225 Difference]: With dead ends: 526 [2020-12-09 20:44:54,198 INFO L226 Difference]: Without dead ends: 526 [2020-12-09 20:44:54,198 INFO L677 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 [2020-12-09 20:44:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-12-09 20:44:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-12-09 20:44:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-12-09 20:44:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1743 transitions. [2020-12-09 20:44:54,222 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1743 transitions. Word has length 11 [2020-12-09 20:44:54,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:54,222 INFO L481 AbstractCegarLoop]: Abstraction has 526 states and 1743 transitions. [2020-12-09 20:44:54,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:44:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1743 transitions. [2020-12-09 20:44:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 20:44:54,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:54,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:54,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 20:44:54,224 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:44:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash 276701328, now seen corresponding path program 1 times [2020-12-09 20:44:54,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:44:54,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985908381] [2020-12-09 20:44:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:44:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:54,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985908381] [2020-12-09 20:44:54,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:44:54,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:44:54,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297479530] [2020-12-09 20:44:54,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:44:54,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:44:54,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:44:54,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:44:54,286 INFO L87 Difference]: Start difference. First operand 526 states and 1743 transitions. Second operand 4 states. [2020-12-09 20:44:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:54,305 INFO L93 Difference]: Finished difference Result 682 states and 2180 transitions. [2020-12-09 20:44:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:44:54,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 20:44:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:54,309 INFO L225 Difference]: With dead ends: 682 [2020-12-09 20:44:54,309 INFO L226 Difference]: Without dead ends: 394 [2020-12-09 20:44:54,309 INFO L677 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 [2020-12-09 20:44:54,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-09 20:44:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2020-12-09 20:44:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-12-09 20:44:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1224 transitions. [2020-12-09 20:44:54,320 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1224 transitions. Word has length 11 [2020-12-09 20:44:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:54,320 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 1224 transitions. [2020-12-09 20:44:54,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:44:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1224 transitions. [2020-12-09 20:44:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 20:44:54,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:54,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:54,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 20:44:54,321 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:44:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:54,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1446350552, now seen corresponding path program 1 times [2020-12-09 20:44:54,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:44:54,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040904214] [2020-12-09 20:44:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:44:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:54,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040904214] [2020-12-09 20:44:54,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:44:54,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:44:54,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303655512] [2020-12-09 20:44:54,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:44:54,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:44:54,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:44:54,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:44:54,356 INFO L87 Difference]: Start difference. First operand 394 states and 1224 transitions. Second operand 3 states. [2020-12-09 20:44:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:54,362 INFO L93 Difference]: Finished difference Result 376 states and 1155 transitions. [2020-12-09 20:44:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:44:54,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-09 20:44:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:54,365 INFO L225 Difference]: With dead ends: 376 [2020-12-09 20:44:54,365 INFO L226 Difference]: Without dead ends: 376 [2020-12-09 20:44:54,365 INFO L677 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 [2020-12-09 20:44:54,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-12-09 20:44:54,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2020-12-09 20:44:54,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-12-09 20:44:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1155 transitions. [2020-12-09 20:44:54,374 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1155 transitions. Word has length 12 [2020-12-09 20:44:54,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:54,375 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 1155 transitions. [2020-12-09 20:44:54,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:44:54,375 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1155 transitions. [2020-12-09 20:44:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 20:44:54,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:54,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:54,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 20:44:54,376 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:44:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash 367079963, now seen corresponding path program 1 times [2020-12-09 20:44:54,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:44:54,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157063671] [2020-12-09 20:44:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:44:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:54,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157063671] [2020-12-09 20:44:54,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:44:54,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:44:54,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465153938] [2020-12-09 20:44:54,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:44:54,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:44:54,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:44:54,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:44:54,419 INFO L87 Difference]: Start difference. First operand 376 states and 1155 transitions. Second operand 5 states. [2020-12-09 20:44:54,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:54,442 INFO L93 Difference]: Finished difference Result 466 states and 1398 transitions. [2020-12-09 20:44:54,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:44:54,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 20:44:54,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:54,444 INFO L225 Difference]: With dead ends: 466 [2020-12-09 20:44:54,444 INFO L226 Difference]: Without dead ends: 226 [2020-12-09 20:44:54,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:44:54,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-09 20:44:54,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-12-09 20:44:54,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-09 20:44:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 651 transitions. [2020-12-09 20:44:54,450 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 651 transitions. Word has length 13 [2020-12-09 20:44:54,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:54,450 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 651 transitions. [2020-12-09 20:44:54,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:44:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 651 transitions. [2020-12-09 20:44:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 20:44:54,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:54,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:54,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 20:44:54,451 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:44:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:54,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1626162599, now seen corresponding path program 1 times [2020-12-09 20:44:54,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:44:54,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687887374] [2020-12-09 20:44:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:44:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:54,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687887374] [2020-12-09 20:44:54,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:44:54,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:44:54,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556193099] [2020-12-09 20:44:54,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:44:54,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:44:54,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:44:54,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:44:54,493 INFO L87 Difference]: Start difference. First operand 226 states and 651 transitions. Second operand 4 states. [2020-12-09 20:44:54,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:54,519 INFO L93 Difference]: Finished difference Result 287 states and 773 transitions. [2020-12-09 20:44:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:44:54,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-09 20:44:54,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:54,521 INFO L225 Difference]: With dead ends: 287 [2020-12-09 20:44:54,521 INFO L226 Difference]: Without dead ends: 206 [2020-12-09 20:44:54,522 INFO L677 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 [2020-12-09 20:44:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-09 20:44:54,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-12-09 20:44:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-09 20:44:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 559 transitions. [2020-12-09 20:44:54,527 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 559 transitions. Word has length 14 [2020-12-09 20:44:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:54,527 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 559 transitions. [2020-12-09 20:44:54,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:44:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 559 transitions. [2020-12-09 20:44:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 20:44:54,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:54,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:54,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 20:44:54,528 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:44:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash 242504516, now seen corresponding path program 1 times [2020-12-09 20:44:54,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:44:54,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950699932] [2020-12-09 20:44:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:44:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:54,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950699932] [2020-12-09 20:44:54,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:44:54,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:44:54,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894982486] [2020-12-09 20:44:54,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:44:54,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:44:54,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:44:54,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:44:54,568 INFO L87 Difference]: Start difference. First operand 206 states and 559 transitions. Second operand 5 states. [2020-12-09 20:44:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:54,602 INFO L93 Difference]: Finished difference Result 227 states and 565 transitions. [2020-12-09 20:44:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:44:54,602 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-09 20:44:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:54,604 INFO L225 Difference]: With dead ends: 227 [2020-12-09 20:44:54,604 INFO L226 Difference]: Without dead ends: 162 [2020-12-09 20:44:54,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:44:54,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-09 20:44:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-12-09 20:44:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-09 20:44:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 391 transitions. [2020-12-09 20:44:54,610 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 391 transitions. Word has length 15 [2020-12-09 20:44:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:54,611 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 391 transitions. [2020-12-09 20:44:54,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:44:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 391 transitions. [2020-12-09 20:44:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 20:44:54,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:54,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:54,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 20:44:54,612 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:44:54,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:54,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1073574531, now seen corresponding path program 1 times [2020-12-09 20:44:54,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:44:54,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995400683] [2020-12-09 20:44:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:44:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:54,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995400683] [2020-12-09 20:44:54,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:44:54,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:44:54,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809890690] [2020-12-09 20:44:54,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:44:54,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:44:54,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:44:54,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:44:54,659 INFO L87 Difference]: Start difference. First operand 162 states and 391 transitions. Second operand 6 states. [2020-12-09 20:44:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:54,707 INFO L93 Difference]: Finished difference Result 158 states and 360 transitions. [2020-12-09 20:44:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 20:44:54,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-09 20:44:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:54,708 INFO L225 Difference]: With dead ends: 158 [2020-12-09 20:44:54,708 INFO L226 Difference]: Without dead ends: 125 [2020-12-09 20:44:54,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:44:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-09 20:44:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-12-09 20:44:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-09 20:44:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 282 transitions. [2020-12-09 20:44:54,711 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 282 transitions. Word has length 16 [2020-12-09 20:44:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:54,712 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 282 transitions. [2020-12-09 20:44:54,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:44:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 282 transitions. [2020-12-09 20:44:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 20:44:54,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:54,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:54,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 20:44:54,712 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:44:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:54,713 INFO L82 PathProgramCache]: Analyzing trace with hash -678185987, now seen corresponding path program 1 times [2020-12-09 20:44:54,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:44:54,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033508266] [2020-12-09 20:44:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:44:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:54,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033508266] [2020-12-09 20:44:54,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:44:54,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:44:54,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051753017] [2020-12-09 20:44:54,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:44:54,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:44:54,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:44:54,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:44:54,743 INFO L87 Difference]: Start difference. First operand 125 states and 282 transitions. Second operand 4 states. [2020-12-09 20:44:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:54,757 INFO L93 Difference]: Finished difference Result 166 states and 368 transitions. [2020-12-09 20:44:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:44:54,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-09 20:44:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:54,758 INFO L225 Difference]: With dead ends: 166 [2020-12-09 20:44:54,758 INFO L226 Difference]: Without dead ends: 127 [2020-12-09 20:44:54,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:44:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-09 20:44:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2020-12-09 20:44:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-09 20:44:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 265 transitions. [2020-12-09 20:44:54,761 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 265 transitions. Word has length 18 [2020-12-09 20:44:54,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:54,762 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 265 transitions. [2020-12-09 20:44:54,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:44:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 265 transitions. [2020-12-09 20:44:54,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 20:44:54,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:54,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:54,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 20:44:54,762 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:44:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:54,763 INFO L82 PathProgramCache]: Analyzing trace with hash -972384293, now seen corresponding path program 1 times [2020-12-09 20:44:54,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:44:54,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106873386] [2020-12-09 20:44:54,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:44:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:54,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106873386] [2020-12-09 20:44:54,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:44:54,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:44:54,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018487037] [2020-12-09 20:44:54,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:44:54,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:44:54,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:44:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:44:54,790 INFO L87 Difference]: Start difference. First operand 125 states and 265 transitions. Second operand 4 states. [2020-12-09 20:44:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:54,805 INFO L93 Difference]: Finished difference Result 142 states and 293 transitions. [2020-12-09 20:44:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:44:54,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-09 20:44:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:54,807 INFO L225 Difference]: With dead ends: 142 [2020-12-09 20:44:54,807 INFO L226 Difference]: Without dead ends: 87 [2020-12-09 20:44:54,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:44:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-09 20:44:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-12-09 20:44:54,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-09 20:44:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 160 transitions. [2020-12-09 20:44:54,810 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 160 transitions. Word has length 18 [2020-12-09 20:44:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:54,810 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 160 transitions. [2020-12-09 20:44:54,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:44:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 160 transitions. [2020-12-09 20:44:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 20:44:54,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:44:54,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:44:54,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 20:44:54,811 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:44:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:44:54,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2140587643, now seen corresponding path program 2 times [2020-12-09 20:44:54,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:44:54,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197006407] [2020-12-09 20:44:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:44:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:44:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:44:54,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197006407] [2020-12-09 20:44:54,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:44:54,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:44:54,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643123289] [2020-12-09 20:44:54,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 20:44:54,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:44:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 20:44:54,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:44:54,865 INFO L87 Difference]: Start difference. First operand 86 states and 160 transitions. Second operand 7 states. [2020-12-09 20:44:54,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:44:54,896 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2020-12-09 20:44:54,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 20:44:54,896 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-09 20:44:54,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:44:54,896 INFO L225 Difference]: With dead ends: 81 [2020-12-09 20:44:54,897 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 20:44:54,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-09 20:44:54,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 20:44:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 20:44:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 20:44:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 20:44:54,897 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-12-09 20:44:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:44:54,898 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 20:44:54,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 20:44:54,898 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 20:44:54,898 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 20:44:54,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 20:44:54,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:44:54 BasicIcfg [2020-12-09 20:44:54,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:44:54,901 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:44:54,901 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:44:54,901 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:44:54,902 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:44:51" (3/4) ... [2020-12-09 20:44:54,904 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 20:44:54,910 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-09 20:44:54,910 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-09 20:44:54,910 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-12-09 20:44:54,910 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P3 [2020-12-09 20:44:54,915 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-12-09 20:44:54,915 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 20:44:54,915 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 20:44:54,915 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 20:44:54,948 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_41d599f9-cabe-41dd-be19-dc86ba91f4dc/bin/utaipan/witness.graphml [2020-12-09 20:44:54,948 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:44:54,949 INFO L168 Benchmark]: Toolchain (without parser) took 4531.21 ms. Allocated memory was 73.4 MB in the beginning and 167.8 MB in the end (delta: 94.4 MB). Free memory was 31.9 MB in the beginning and 85.5 MB in the end (delta: -53.6 MB). Peak memory consumption was 42.4 MB. Max. memory is 16.1 GB. [2020-12-09 20:44:54,949 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 73.4 MB. Free memory is still 49.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:44:54,949 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.28 ms. Allocated memory was 73.4 MB in the beginning and 115.3 MB in the end (delta: 41.9 MB). Free memory was 31.7 MB in the beginning and 65.9 MB in the end (delta: -34.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-12-09 20:44:54,950 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.19 ms. Allocated memory is still 115.3 MB. Free memory was 65.6 MB in the beginning and 63.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:44:54,950 INFO L168 Benchmark]: Boogie Preprocessor took 19.62 ms. Allocated memory is still 115.3 MB. Free memory was 63.8 MB in the beginning and 62.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:44:54,950 INFO L168 Benchmark]: RCFGBuilder took 303.11 ms. Allocated memory is still 115.3 MB. Free memory was 62.3 MB in the beginning and 71.3 MB in the end (delta: -8.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 20:44:54,951 INFO L168 Benchmark]: TraceAbstraction took 3788.38 ms. Allocated memory was 115.3 MB in the beginning and 167.8 MB in the end (delta: 52.4 MB). Free memory was 71.3 MB in the beginning and 88.6 MB in the end (delta: -17.4 MB). Peak memory consumption was 37.0 MB. Max. memory is 16.1 GB. [2020-12-09 20:44:54,951 INFO L168 Benchmark]: Witness Printer took 46.65 ms. Allocated memory is still 167.8 MB. Free memory was 88.6 MB in the beginning and 85.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:44:54,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 73.4 MB. Free memory is still 49.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 337.28 ms. Allocated memory was 73.4 MB in the beginning and 115.3 MB in the end (delta: 41.9 MB). Free memory was 31.7 MB in the beginning and 65.9 MB in the end (delta: -34.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.19 ms. Allocated memory is still 115.3 MB. Free memory was 65.6 MB in the beginning and 63.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.62 ms. Allocated memory is still 115.3 MB. Free memory was 63.8 MB in the beginning and 62.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 303.11 ms. Allocated memory is still 115.3 MB. Free memory was 62.3 MB in the beginning and 71.3 MB in the end (delta: -8.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3788.38 ms. Allocated memory was 115.3 MB in the beginning and 167.8 MB in the end (delta: 52.4 MB). Free memory was 71.3 MB in the beginning and 88.6 MB in the end (delta: -17.4 MB). Peak memory consumption was 37.0 MB. Max. memory is 16.1 GB. * Witness Printer took 46.65 ms. Allocated memory is still 167.8 MB. Free memory was 88.6 MB in the beginning and 85.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1210 VarBasedMoverChecksPositive, 66 VarBasedMoverChecksNegative, 13 SemBasedMoverChecksPositive, 53 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.4s, 112 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.5s, 98 PlacesBefore, 38 PlacesAfterwards, 87 TransitionsBefore, 25 TransitionsAfterwards, 1866 CoEnabledTransitionPairs, 5 FixpointIterations, 19 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 2 ChoiceCompositions, 72 TotalNumberOfCompositions, 3161 MoverChecksTotal - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 86 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.7s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 236 SDtfs, 273 SDslu, 323 SDs, 0 SdLazy, 170 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=706occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 7317 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...