./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/TwoWay.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/TwoWay.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6e96af222dc7427442f09a30ad05a811063c14ee1b704442df6b3bb77339a035 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 06:06:54,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 06:06:54,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 06:06:54,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 06:06:54,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 06:06:55,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 06:06:55,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 06:06:55,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 06:06:55,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 06:06:55,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 06:06:55,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 06:06:55,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 06:06:55,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 06:06:55,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 06:06:55,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 06:06:55,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 06:06:55,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 06:06:55,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 06:06:55,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 06:06:55,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 06:06:55,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 06:06:55,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 06:06:55,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 06:06:55,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 06:06:55,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 06:06:55,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 06:06:55,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 06:06:55,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 06:06:55,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 06:06:55,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 06:06:55,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 06:06:55,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 06:06:55,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 06:06:55,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 06:06:55,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 06:06:55,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 06:06:55,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 06:06:55,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 06:06:55,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 06:06:55,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 06:06:55,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 06:06:55,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-10-20 06:06:55,175 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 06:06:55,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 06:06:55,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 06:06:55,177 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 06:06:55,177 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 06:06:55,177 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 06:06:55,178 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 06:06:55,178 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 06:06:55,178 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 06:06:55,179 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 06:06:55,179 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 06:06:55,179 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 06:06:55,179 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 06:06:55,180 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 06:06:55,180 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 06:06:55,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 06:06:55,181 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-20 06:06:55,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 06:06:55,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 06:06:55,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 06:06:55,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 06:06:55,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 06:06:55,183 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-20 06:06:55,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 06:06:55,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 06:06:55,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 06:06:55,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 06:06:55,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 06:06:55,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:06:55,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 06:06:55,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 06:06:55,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 06:06:55,186 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 06:06:55,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 06:06:55,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 06:06:55,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 06:06:55,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 06:06:55,200 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_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e96af222dc7427442f09a30ad05a811063c14ee1b704442df6b3bb77339a035 [2021-10-20 06:06:55,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 06:06:55,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 06:06:55,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 06:06:55,557 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 06:06:55,557 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 06:06:55,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/termination-numeric/TwoWay.c [2021-10-20 06:06:55,691 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/data/65cd9290d/56a7fdf36e2944c7893f2575793614d8/FLAGa79724ca6 [2021-10-20 06:06:56,266 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 06:06:56,267 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/sv-benchmarks/c/termination-numeric/TwoWay.c [2021-10-20 06:06:56,278 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/data/65cd9290d/56a7fdf36e2944c7893f2575793614d8/FLAGa79724ca6 [2021-10-20 06:06:56,641 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/data/65cd9290d/56a7fdf36e2944c7893f2575793614d8 [2021-10-20 06:06:56,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 06:06:56,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 06:06:56,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 06:06:56,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 06:06:56,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 06:06:56,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:06:56" (1/1) ... [2021-10-20 06:06:56,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@84d25b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56, skipping insertion in model container [2021-10-20 06:06:56,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:06:56" (1/1) ... [2021-10-20 06:06:56,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 06:06:56,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 06:06:56,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:06:56,843 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 06:06:56,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:06:56,875 INFO L208 MainTranslator]: Completed translation [2021-10-20 06:06:56,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56 WrapperNode [2021-10-20 06:06:56,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 06:06:56,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 06:06:56,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 06:06:56,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 06:06:56,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56" (1/1) ... [2021-10-20 06:06:56,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56" (1/1) ... [2021-10-20 06:06:56,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 06:06:56,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 06:06:56,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 06:06:56,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 06:06:56,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56" (1/1) ... [2021-10-20 06:06:56,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56" (1/1) ... [2021-10-20 06:06:56,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56" (1/1) ... [2021-10-20 06:06:56,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56" (1/1) ... [2021-10-20 06:06:56,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56" (1/1) ... [2021-10-20 06:06:56,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56" (1/1) ... [2021-10-20 06:06:56,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56" (1/1) ... [2021-10-20 06:06:56,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 06:06:56,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 06:06:56,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 06:06:56,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 06:06:56,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56" (1/1) ... [2021-10-20 06:06:56,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:06:56,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:06:56,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 06:06:57,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 06:06:57,050 INFO L130 BoogieDeclarations]: Found specification of procedure twoWay [2021-10-20 06:06:57,051 INFO L138 BoogieDeclarations]: Found implementation of procedure twoWay [2021-10-20 06:06:57,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 06:06:57,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 06:06:57,314 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 06:06:57,315 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-20 06:06:57,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:06:57 BoogieIcfgContainer [2021-10-20 06:06:57,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 06:06:57,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 06:06:57,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 06:06:57,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 06:06:57,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:06:56" (1/3) ... [2021-10-20 06:06:57,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4461ace0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:06:57, skipping insertion in model container [2021-10-20 06:06:57,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:56" (2/3) ... [2021-10-20 06:06:57,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4461ace0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:06:57, skipping insertion in model container [2021-10-20 06:06:57,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:06:57" (3/3) ... [2021-10-20 06:06:57,330 INFO L111 eAbstractionObserver]: Analyzing ICFG TwoWay.c [2021-10-20 06:06:57,336 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 06:06:57,337 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-20 06:06:57,431 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 06:06:57,444 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 06:06:57,444 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-20 06:06:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-20 06:06:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 06:06:57,483 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:57,484 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:06:57,484 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-20 06:06:57,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:57,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1734939443, now seen corresponding path program 1 times [2021-10-20 06:06:57,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:57,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773106267] [2021-10-20 06:06:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:57,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:57,888 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:57,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773106267] [2021-10-20 06:06:57,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773106267] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:57,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:57,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-20 06:06:57,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942765065] [2021-10-20 06:06:57,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-20 06:06:57,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-20 06:06:57,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-20 06:06:57,919 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:06:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:58,200 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-10-20 06:06:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-20 06:06:58,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-20 06:06:58,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:58,214 INFO L225 Difference]: With dead ends: 55 [2021-10-20 06:06:58,214 INFO L226 Difference]: Without dead ends: 51 [2021-10-20 06:06:58,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-20 06:06:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-20 06:06:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2021-10-20 06:06:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.6) internal successors, (40), 32 states have internal predecessors, (40), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-20 06:06:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-10-20 06:06:58,298 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 8 [2021-10-20 06:06:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:58,299 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-10-20 06:06:58,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:06:58,300 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-10-20 06:06:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 06:06:58,301 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:58,302 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:06:58,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 06:06:58,303 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-20 06:06:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:58,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1734939635, now seen corresponding path program 1 times [2021-10-20 06:06:58,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:58,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908726488] [2021-10-20 06:06:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:58,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:58,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:58,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908726488] [2021-10-20 06:06:58,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908726488] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:58,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:58,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 06:06:58,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179867977] [2021-10-20 06:06:58,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:06:58,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:58,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:06:58,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:06:58,358 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:06:58,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:58,381 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-10-20 06:06:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:06:58,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-20 06:06:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:58,383 INFO L225 Difference]: With dead ends: 45 [2021-10-20 06:06:58,383 INFO L226 Difference]: Without dead ends: 18 [2021-10-20 06:06:58,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:06:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-20 06:06:58,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-20 06:06:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-20 06:06:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-20 06:06:58,391 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-10-20 06:06:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:58,392 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-20 06:06:58,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:06:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-20 06:06:58,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 06:06:58,393 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:58,393 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:06:58,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 06:06:58,394 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-20 06:06:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2051452074, now seen corresponding path program 1 times [2021-10-20 06:06:58,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:58,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065432739] [2021-10-20 06:06:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:58,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:58,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:58,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065432739] [2021-10-20 06:06:58,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065432739] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:58,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:58,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 06:06:58,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118845997] [2021-10-20 06:06:58,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:06:58,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:58,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:06:58,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:06:58,447 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:06:58,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:58,486 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-20 06:06:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:06:58,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-20 06:06:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:58,491 INFO L225 Difference]: With dead ends: 18 [2021-10-20 06:06:58,491 INFO L226 Difference]: Without dead ends: 17 [2021-10-20 06:06:58,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:06:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-20 06:06:58,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-20 06:06:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-20 06:06:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-20 06:06:58,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-10-20 06:06:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:58,503 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-20 06:06:58,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:06:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-20 06:06:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-20 06:06:58,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:58,506 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:06:58,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 06:06:58,507 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-20 06:06:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:58,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2048642091, now seen corresponding path program 1 times [2021-10-20 06:06:58,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:58,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541801186] [2021-10-20 06:06:58,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:58,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:58,547 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 06:06:58,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269943081] [2021-10-20 06:06:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:58,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:06:58,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:06:58,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:06:58,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-20 06:06:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:58,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-20 06:06:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:06:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-20 06:06:58,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:06:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-20 06:06:59,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:59,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541801186] [2021-10-20 06:06:59,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:06:59,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269943081] [2021-10-20 06:06:59,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269943081] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:59,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:59,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-20 06:06:59,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900679998] [2021-10-20 06:06:59,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-20 06:06:59,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:59,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-20 06:06:59,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-20 06:06:59,719 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-20 06:06:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:59,808 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-10-20 06:06:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 06:06:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-10-20 06:06:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:59,811 INFO L225 Difference]: With dead ends: 24 [2021-10-20 06:06:59,812 INFO L226 Difference]: Without dead ends: 23 [2021-10-20 06:06:59,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-20 06:06:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-20 06:06:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-10-20 06:06:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-20 06:06:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-20 06:06:59,824 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2021-10-20 06:06:59,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:59,825 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-20 06:06:59,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-20 06:06:59,825 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-20 06:06:59,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-20 06:06:59,827 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:59,827 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:06:59,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-20 06:07:00,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:00,044 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-20 06:07:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:07:00,044 INFO L82 PathProgramCache]: Analyzing trace with hash -916604565, now seen corresponding path program 1 times [2021-10-20 06:07:00,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:07:00,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627900483] [2021-10-20 06:07:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:00,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:07:00,060 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 06:07:00,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400016321] [2021-10-20 06:07:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:00,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:00,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:07:00,062 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:07:00,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-20 06:07:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:07:00,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-20 06:07:00,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:07:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-20 06:07:00,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:07:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 06:07:00,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:07:00,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627900483] [2021-10-20 06:07:00,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:07:00,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400016321] [2021-10-20 06:07:00,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400016321] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:07:00,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:07:00,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-10-20 06:07:00,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22899432] [2021-10-20 06:07:00,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-20 06:07:00,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:07:00,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-20 06:07:00,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-20 06:07:00,563 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 13 states, 10 states have (on average 2.3) internal successors, (23), 13 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-20 06:07:00,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:07:00,730 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-10-20 06:07:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-20 06:07:00,731 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.3) internal successors, (23), 13 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-10-20 06:07:00,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:07:00,733 INFO L225 Difference]: With dead ends: 23 [2021-10-20 06:07:00,734 INFO L226 Difference]: Without dead ends: 22 [2021-10-20 06:07:00,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-10-20 06:07:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-20 06:07:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-20 06:07:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-20 06:07:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-20 06:07:00,749 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-10-20 06:07:00,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:07:00,750 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-20 06:07:00,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.3) internal successors, (23), 13 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-20 06:07:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-20 06:07:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-20 06:07:00,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:07:00,758 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:07:00,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-20 06:07:00,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:00,959 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-20 06:07:00,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:07:00,960 INFO L82 PathProgramCache]: Analyzing trace with hash 37921722, now seen corresponding path program 1 times [2021-10-20 06:07:00,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:07:00,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479828940] [2021-10-20 06:07:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:00,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:07:00,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 06:07:00,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365532678] [2021-10-20 06:07:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:00,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:00,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:07:00,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:07:01,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-20 06:07:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:07:01,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-20 06:07:01,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:07:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-20 06:07:01,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:07:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-20 06:07:03,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:07:03,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479828940] [2021-10-20 06:07:03,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:07:03,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365532678] [2021-10-20 06:07:03,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365532678] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:07:03,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007398380] [2021-10-20 06:07:03,531 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-20 06:07:03,536 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:07:03,542 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-20 06:07:03,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-20 06:07:03,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-20 06:07:03,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931474248] [2021-10-20 06:07:03,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-20 06:07:03,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:07:03,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-20 06:07:03,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-20 06:07:03,556 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-20 06:07:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:07:05,167 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-10-20 06:07:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-20 06:07:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-10-20 06:07:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:07:05,169 INFO L225 Difference]: With dead ends: 28 [2021-10-20 06:07:05,169 INFO L226 Difference]: Without dead ends: 27 [2021-10-20 06:07:05,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1461.9ms TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2021-10-20 06:07:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-20 06:07:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-10-20 06:07:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-20 06:07:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-20 06:07:05,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 27 [2021-10-20 06:07:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:07:05,176 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-20 06:07:05,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-20 06:07:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-20 06:07:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-20 06:07:05,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:07:05,178 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:07:05,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-20 06:07:05,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:05,392 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-20 06:07:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:07:05,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2097168606, now seen corresponding path program 1 times [2021-10-20 06:07:05,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:07:05,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874698410] [2021-10-20 06:07:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:05,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:07:05,405 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 06:07:05,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779816937] [2021-10-20 06:07:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:05,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:05,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:07:05,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:07:05,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-20 06:07:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:07:05,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-20 06:07:05,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:07:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-20 06:07:07,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:07:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-20 06:07:24,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:07:24,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874698410] [2021-10-20 06:07:24,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:07:24,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779816937] [2021-10-20 06:07:24,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779816937] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:07:24,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614176750] [2021-10-20 06:07:24,189 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-20 06:07:24,189 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:07:24,190 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-20 06:07:24,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-20 06:07:24,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-10-20 06:07:24,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111824664] [2021-10-20 06:07:24,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-20 06:07:24,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:07:24,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-20 06:07:24,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-10-20 06:07:24,194 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-20 06:07:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:07:27,914 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-20 06:07:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-20 06:07:27,915 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-10-20 06:07:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:07:27,916 INFO L225 Difference]: With dead ends: 29 [2021-10-20 06:07:27,917 INFO L226 Difference]: Without dead ends: 28 [2021-10-20 06:07:27,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 8566.4ms TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-10-20 06:07:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-20 06:07:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-10-20 06:07:27,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-20 06:07:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-10-20 06:07:27,923 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 34 [2021-10-20 06:07:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:07:27,923 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-10-20 06:07:27,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-20 06:07:27,924 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-10-20 06:07:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-20 06:07:27,925 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:07:27,925 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-20 06:07:27,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-20 06:07:28,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:28,148 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-20 06:07:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:07:28,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1355949953, now seen corresponding path program 2 times [2021-10-20 06:07:28,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:07:28,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516136369] [2021-10-20 06:07:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:07:28,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:07:28,185 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 06:07:28,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802569935] [2021-10-20 06:07:28,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-20 06:07:28,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:28,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:07:28,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:07:28,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-20 06:07:28,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-20 06:07:28,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-20 06:07:28,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-20 06:07:28,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:07:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-20 06:07:29,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:07:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-20 06:07:31,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:07:31,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516136369] [2021-10-20 06:07:31,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:07:31,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802569935] [2021-10-20 06:07:31,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802569935] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:07:31,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759874952] [2021-10-20 06:07:31,265 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-20 06:07:31,265 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:07:31,266 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-20 06:07:31,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-20 06:07:31,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-10-20 06:07:31,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421264809] [2021-10-20 06:07:31,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-20 06:07:31,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:07:31,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-20 06:07:31,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-10-20 06:07:31,272 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 21 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-20 06:07:31,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:07:31,720 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-20 06:07:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-20 06:07:31,721 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-10-20 06:07:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:07:31,725 INFO L225 Difference]: With dead ends: 28 [2021-10-20 06:07:31,725 INFO L226 Difference]: Without dead ends: 0 [2021-10-20 06:07:31,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1123.4ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-10-20 06:07:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-20 06:07:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-20 06:07:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:07:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-20 06:07:31,728 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2021-10-20 06:07:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:07:31,728 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-20 06:07:31,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-20 06:07:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-20 06:07:31,731 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-20 06:07:31,735 INFO L764 garLoopResultBuilder]: Registering result SAFE for location twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-20 06:07:31,736 INFO L764 garLoopResultBuilder]: Registering result SAFE for location twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-20 06:07:31,736 INFO L764 garLoopResultBuilder]: Registering result SAFE for location twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-20 06:07:31,736 INFO L764 garLoopResultBuilder]: Registering result SAFE for location twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-20 06:07:31,737 INFO L764 garLoopResultBuilder]: Registering result SAFE for location twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-20 06:07:31,737 INFO L764 garLoopResultBuilder]: Registering result SAFE for location twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-20 06:07:31,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-20 06:07:31,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:07:31,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-20 06:07:31,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:31,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:31,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:31,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:31,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:31,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:31,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:31,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:31,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:31,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:07:32,052 INFO L857 garLoopResultBuilder]: For program point L31(lines 31 35) no Hoare annotation was computed. [2021-10-20 06:07:32,052 INFO L853 garLoopResultBuilder]: At program point L31-2(lines 31 35) the Hoare annotation is: (or (not (<= 1 |twoWay_#in~terminate|)) (and (<= 1 twoWay_~terminate) (<= twoWay_~m~0 2147483647) (<= |twoWay_#in~n| (+ 1 twoWay_~m~0)) (<= |twoWay_#in~n| twoWay_~n) (<= twoWay_~n |twoWay_#in~n|) (<= 0 |twoWay_#in~n|)) (not (<= |twoWay_#in~n| 2147483647))) [2021-10-20 06:07:32,052 INFO L857 garLoopResultBuilder]: For program point L27(lines 27 37) no Hoare annotation was computed. [2021-10-20 06:07:32,053 INFO L857 garLoopResultBuilder]: For program point twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2021-10-20 06:07:32,053 INFO L857 garLoopResultBuilder]: For program point twoWayFINAL(lines 26 38) no Hoare annotation was computed. [2021-10-20 06:07:32,053 INFO L857 garLoopResultBuilder]: For program point twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 34) no Hoare annotation was computed. [2021-10-20 06:07:32,053 INFO L857 garLoopResultBuilder]: For program point twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 36) no Hoare annotation was computed. [2021-10-20 06:07:32,054 INFO L857 garLoopResultBuilder]: For program point L36(line 36) no Hoare annotation was computed. [2021-10-20 06:07:32,054 INFO L857 garLoopResultBuilder]: For program point L36-1(line 36) no Hoare annotation was computed. [2021-10-20 06:07:32,054 INFO L857 garLoopResultBuilder]: For program point L34(line 34) no Hoare annotation was computed. [2021-10-20 06:07:32,054 INFO L857 garLoopResultBuilder]: For program point L36-2(line 36) no Hoare annotation was computed. [2021-10-20 06:07:32,054 INFO L857 garLoopResultBuilder]: For program point L34-1(line 34) no Hoare annotation was computed. [2021-10-20 06:07:32,055 INFO L857 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-10-20 06:07:32,055 INFO L857 garLoopResultBuilder]: For program point L32-1(line 32) no Hoare annotation was computed. [2021-10-20 06:07:32,055 INFO L860 garLoopResultBuilder]: At program point twoWayENTRY(lines 26 38) the Hoare annotation is: true [2021-10-20 06:07:32,055 INFO L857 garLoopResultBuilder]: For program point twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2021-10-20 06:07:32,056 INFO L857 garLoopResultBuilder]: For program point twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 36) no Hoare annotation was computed. [2021-10-20 06:07:32,056 INFO L857 garLoopResultBuilder]: For program point twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 34) no Hoare annotation was computed. [2021-10-20 06:07:32,056 INFO L857 garLoopResultBuilder]: For program point twoWayEXIT(lines 26 38) no Hoare annotation was computed. [2021-10-20 06:07:32,056 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-20 06:07:32,056 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-20 06:07:32,057 INFO L853 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2021-10-20 06:07:32,057 INFO L857 garLoopResultBuilder]: For program point L48-1(line 48) no Hoare annotation was computed. [2021-10-20 06:07:32,057 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 46) no Hoare annotation was computed. [2021-10-20 06:07:32,057 INFO L857 garLoopResultBuilder]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-10-20 06:07:32,058 INFO L853 garLoopResultBuilder]: At program point L40(lines 40 50) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2021-10-20 06:07:32,063 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 06:07:32,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:07:32 BoogieIcfgContainer [2021-10-20 06:07:32,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 06:07:32,079 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 06:07:32,079 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 06:07:32,080 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 06:07:32,080 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:06:57" (3/4) ... [2021-10-20 06:07:32,084 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-20 06:07:32,091 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure twoWay [2021-10-20 06:07:32,097 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-20 06:07:32,098 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-20 06:07:32,139 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 06:07:32,139 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 06:07:32,141 INFO L168 Benchmark]: Toolchain (without parser) took 35494.18 ms. Allocated memory was 104.9 MB in the beginning and 174.1 MB in the end (delta: 69.2 MB). Free memory was 75.2 MB in the beginning and 117.2 MB in the end (delta: -42.0 MB). Peak memory consumption was 29.6 MB. Max. memory is 16.1 GB. [2021-10-20 06:07:32,142 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 104.9 MB. Free memory is still 75.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:07:32,142 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.81 ms. Allocated memory is still 104.9 MB. Free memory was 75.0 MB in the beginning and 66.4 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 06:07:32,143 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.73 ms. Allocated memory is still 104.9 MB. Free memory was 66.2 MB in the beginning and 65.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:07:32,144 INFO L168 Benchmark]: Boogie Preprocessor took 18.53 ms. Allocated memory is still 104.9 MB. Free memory was 65.0 MB in the beginning and 64.1 MB in the end (delta: 888.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:07:32,144 INFO L168 Benchmark]: RCFGBuilder took 384.80 ms. Allocated memory is still 104.9 MB. Free memory was 64.1 MB in the beginning and 55.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-20 06:07:32,145 INFO L168 Benchmark]: TraceAbstraction took 34758.04 ms. Allocated memory was 104.9 MB in the beginning and 174.1 MB in the end (delta: 69.2 MB). Free memory was 54.5 MB in the beginning and 119.3 MB in the end (delta: -64.9 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-10-20 06:07:32,145 INFO L168 Benchmark]: Witness Printer took 60.43 ms. Allocated memory is still 174.1 MB. Free memory was 119.3 MB in the beginning and 117.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:07:32,148 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 104.9 MB. Free memory is still 75.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 226.81 ms. Allocated memory is still 104.9 MB. Free memory was 75.0 MB in the beginning and 66.4 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.73 ms. Allocated memory is still 104.9 MB. Free memory was 66.2 MB in the beginning and 65.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.53 ms. Allocated memory is still 104.9 MB. Free memory was 65.0 MB in the beginning and 64.1 MB in the end (delta: 888.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 384.80 ms. Allocated memory is still 104.9 MB. Free memory was 64.1 MB in the beginning and 55.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 34758.04 ms. Allocated memory was 104.9 MB in the beginning and 174.1 MB in the end (delta: 69.2 MB). Free memory was 54.5 MB in the beginning and 119.3 MB in the end (delta: -64.9 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Witness Printer took 60.43 ms. Allocated memory is still 174.1 MB. Free memory was 119.3 MB in the beginning and 117.2 MB in the end (delta: 2.1 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: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 34]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 34]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 36]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 36]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 34634.4ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 18.7ms, AutomataDifference: 6463.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 91.3ms, InitialAbstractionConstructionTime: 29.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 100 SDtfs, 279 SDslu, 382 SDs, 0 SdLazy, 615 SolverSat, 110 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1945.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 312 GetRequests, 185 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 11694.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=1, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 98.1ms AutomataMinimizationTime, 8 MinimizatonAttempts, 24 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 12 NumberOfFragments, 37 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 28.9ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 54.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 63.6ms SsaConstructionTime, 168.1ms SatisfiabilityAnalysisTime, 25639.7ms InterpolantComputationTime, 158 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 278 ConstructedInterpolants, 47 QuantifiedInterpolants, 1591 SizeOfPredicates, 25 NumberOfNonLiveVariables, 394 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 122/172 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 - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x <= 2147483647 RESULT: Ultimate proved your program to be correct! [2021-10-20 06:07:32,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f50161dd-8e7a-4fa2-84f0-a171483431b7/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...