./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 417a96bf424eb15cdf3ae2ce282b015c547ba383 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 417a96bf424eb15cdf3ae2ce282b015c547ba383 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 08:31:47,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:31:47,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:31:47,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:31:47,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:31:47,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:31:47,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:31:47,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:31:47,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:31:47,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:31:47,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:31:47,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:31:47,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:31:47,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:31:47,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:31:47,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:31:47,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:31:47,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:31:47,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:31:47,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:31:47,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:31:47,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:31:47,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:31:47,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:31:47,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:31:47,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:31:47,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:31:47,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:31:47,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:31:47,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:31:47,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:31:47,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:31:47,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:31:47,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:31:47,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:31:47,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:31:47,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:31:47,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:31:47,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:31:47,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:31:47,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:31:48,000 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 08:31:48,022 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:31:48,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:31:48,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:31:48,023 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:31:48,023 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:31:48,023 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:31:48,023 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:31:48,023 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:31:48,023 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:31:48,023 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:31:48,023 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:31:48,024 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:31:48,024 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:31:48,024 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:31:48,024 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:31:48,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:31:48,025 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:31:48,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:31:48,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:31:48,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:31:48,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:31:48,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:31:48,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:31:48,026 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:31:48,026 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:31:48,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:31:48,026 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:31:48,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:31:48,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:31:48,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:31:48,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:31:48,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:31:48,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:31:48,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:31:48,027 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:31:48,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:31:48,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:31:48,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:31:48,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:31:48,028 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417a96bf424eb15cdf3ae2ce282b015c547ba383 [2020-12-09 08:31:48,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:31:48,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:31:48,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:31:48,226 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:31:48,226 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:31:48,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/../../sv-benchmarks/c/verifythis/duplets.c [2020-12-09 08:31:48,269 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/data/c48a3db72/397c954f087843e4bf64956dd093fdab/FLAG3d7d569cc [2020-12-09 08:31:48,662 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:31:48,662 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/sv-benchmarks/c/verifythis/duplets.c [2020-12-09 08:31:48,667 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/data/c48a3db72/397c954f087843e4bf64956dd093fdab/FLAG3d7d569cc [2020-12-09 08:31:48,676 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/data/c48a3db72/397c954f087843e4bf64956dd093fdab [2020-12-09 08:31:48,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:31:48,679 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:31:48,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:31:48,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:31:48,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:31:48,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:31:48" (1/1) ... [2020-12-09 08:31:48,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2be99c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48, skipping insertion in model container [2020-12-09 08:31:48,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:31:48" (1/1) ... [2020-12-09 08:31:48,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:31:48,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:31:48,803 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/sv-benchmarks/c/verifythis/duplets.c[485,498] [2020-12-09 08:31:48,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:31:48,831 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:31:48,840 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/sv-benchmarks/c/verifythis/duplets.c[485,498] [2020-12-09 08:31:48,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:31:48,863 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:31:48,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48 WrapperNode [2020-12-09 08:31:48,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:31:48,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:31:48,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:31:48,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:31:48,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48" (1/1) ... [2020-12-09 08:31:48,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48" (1/1) ... [2020-12-09 08:31:48,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:31:48,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:31:48,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:31:48,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:31:48,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48" (1/1) ... [2020-12-09 08:31:48,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48" (1/1) ... [2020-12-09 08:31:48,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48" (1/1) ... [2020-12-09 08:31:48,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48" (1/1) ... [2020-12-09 08:31:48,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48" (1/1) ... [2020-12-09 08:31:48,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48" (1/1) ... [2020-12-09 08:31:48,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48" (1/1) ... [2020-12-09 08:31:48,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:31:48,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:31:48,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:31:48,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:31:48,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:31:49,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 08:31:49,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:31:49,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 08:31:49,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 08:31:49,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:31:49,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:31:49,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 08:31:49,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 08:31:49,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:31:49,471 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-09 08:31:49,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:31:49 BoogieIcfgContainer [2020-12-09 08:31:49,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:31:49,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:31:49,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:31:49,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:31:49,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:31:48" (1/3) ... [2020-12-09 08:31:49,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c3a4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:31:49, skipping insertion in model container [2020-12-09 08:31:49,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:48" (2/3) ... [2020-12-09 08:31:49,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c3a4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:31:49, skipping insertion in model container [2020-12-09 08:31:49,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:31:49" (3/3) ... [2020-12-09 08:31:49,478 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2020-12-09 08:31:49,487 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:31:49,490 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-09 08:31:49,497 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-09 08:31:49,513 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:31:49,514 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:31:49,514 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:31:49,514 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:31:49,514 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:31:49,514 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:31:49,514 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:31:49,514 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:31:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-09 08:31:49,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 08:31:49,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:31:49,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 08:31:49,527 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:31:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:31:49,531 INFO L82 PathProgramCache]: Analyzing trace with hash 177948689, now seen corresponding path program 1 times [2020-12-09 08:31:49,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:31:49,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631383590] [2020-12-09 08:31:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:31:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:31:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:49,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631383590] [2020-12-09 08:31:49,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:31:49,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:31:49,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889897372] [2020-12-09 08:31:49,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:31:49,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:31:49,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:31:49,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:31:49,717 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-12-09 08:31:49,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:31:49,747 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-12-09 08:31:49,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:31:49,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 08:31:49,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:31:49,754 INFO L225 Difference]: With dead ends: 73 [2020-12-09 08:31:49,754 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 08:31:49,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:31:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 08:31:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2020-12-09 08:31:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 08:31:49,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-09 08:31:49,781 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 5 [2020-12-09 08:31:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:31:49,781 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-09 08:31:49,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:31:49,781 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-09 08:31:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 08:31:49,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:31:49,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:31:49,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:31:49,782 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:31:49,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:31:49,783 INFO L82 PathProgramCache]: Analyzing trace with hash 597213427, now seen corresponding path program 1 times [2020-12-09 08:31:49,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:31:49,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803297481] [2020-12-09 08:31:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:31:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:31:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:49,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803297481] [2020-12-09 08:31:49,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:31:49,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:31:49,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185667755] [2020-12-09 08:31:49,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:31:49,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:31:49,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:31:49,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:31:49,841 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-12-09 08:31:49,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:31:49,882 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-12-09 08:31:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:31:49,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 08:31:49,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:31:49,883 INFO L225 Difference]: With dead ends: 45 [2020-12-09 08:31:49,883 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 08:31:49,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:31:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 08:31:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2020-12-09 08:31:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 08:31:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-09 08:31:49,887 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 7 [2020-12-09 08:31:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:31:49,887 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-09 08:31:49,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:31:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-09 08:31:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 08:31:49,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:31:49,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:31:49,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 08:31:49,888 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:31:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:31:49,889 INFO L82 PathProgramCache]: Analyzing trace with hash 693170238, now seen corresponding path program 1 times [2020-12-09 08:31:49,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:31:49,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760940015] [2020-12-09 08:31:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:31:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:31:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:49,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760940015] [2020-12-09 08:31:49,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:31:49,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:31:49,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680790311] [2020-12-09 08:31:49,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:31:49,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:31:49,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:31:49,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:31:49,953 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 4 states. [2020-12-09 08:31:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:31:49,989 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-12-09 08:31:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:31:49,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 08:31:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:31:49,990 INFO L225 Difference]: With dead ends: 73 [2020-12-09 08:31:49,990 INFO L226 Difference]: Without dead ends: 48 [2020-12-09 08:31:49,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:31:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-09 08:31:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2020-12-09 08:31:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 08:31:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-09 08:31:49,994 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 7 [2020-12-09 08:31:49,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:31:49,995 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-09 08:31:49,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:31:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-09 08:31:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 08:31:49,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:31:49,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:31:49,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 08:31:49,995 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:31:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:31:49,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1603320325, now seen corresponding path program 1 times [2020-12-09 08:31:49,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:31:49,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008795393] [2020-12-09 08:31:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:31:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:31:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:50,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008795393] [2020-12-09 08:31:50,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:31:50,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 08:31:50,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207140195] [2020-12-09 08:31:50,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 08:31:50,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:31:50,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 08:31:50,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-09 08:31:50,166 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-12-09 08:31:50,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:31:50,392 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-12-09 08:31:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 08:31:50,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-09 08:31:50,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:31:50,393 INFO L225 Difference]: With dead ends: 62 [2020-12-09 08:31:50,393 INFO L226 Difference]: Without dead ends: 60 [2020-12-09 08:31:50,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-12-09 08:31:50,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-09 08:31:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2020-12-09 08:31:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 08:31:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-12-09 08:31:50,398 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 9 [2020-12-09 08:31:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:31:50,398 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-12-09 08:31:50,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 08:31:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-12-09 08:31:50,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 08:31:50,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:31:50,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:31:50,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 08:31:50,399 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:31:50,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:31:50,399 INFO L82 PathProgramCache]: Analyzing trace with hash 795195818, now seen corresponding path program 1 times [2020-12-09 08:31:50,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:31:50,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092257790] [2020-12-09 08:31:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:31:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:31:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:50,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092257790] [2020-12-09 08:31:50,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340923598] [2020-12-09 08:31:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:31:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:31:50,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 08:31:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:31:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:50,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:31:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:50,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1309082717] [2020-12-09 08:31:50,564 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 08:31:50,564 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:31:50,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:31:50,571 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:31:50,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:31:50,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:31:51,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:31:51,065 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: incompatible size at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:210) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:570) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) 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:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2020-12-09 08:31:51,089 INFO L168 Benchmark]: Toolchain (without parser) took 2407.01 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 68.2 MB in the beginning and 119.6 MB in the end (delta: -51.4 MB). Peak memory consumption was 53.8 MB. Max. memory is 16.1 GB. [2020-12-09 08:31:51,090 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 98.6 MB. Free memory is still 76.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:31:51,092 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.82 ms. Allocated memory is still 98.6 MB. Free memory was 67.9 MB in the beginning and 57.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 08:31:51,094 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.15 ms. Allocated memory is still 98.6 MB. Free memory was 57.4 MB in the beginning and 55.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:31:51,096 INFO L168 Benchmark]: Boogie Preprocessor took 23.82 ms. Allocated memory is still 98.6 MB. Free memory was 55.4 MB in the beginning and 53.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:31:51,099 INFO L168 Benchmark]: RCFGBuilder took 536.91 ms. Allocated memory is still 98.6 MB. Free memory was 53.8 MB in the beginning and 55.6 MB in the end (delta: -1.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2020-12-09 08:31:51,102 INFO L168 Benchmark]: TraceAbstraction took 1611.87 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 55.2 MB in the beginning and 119.6 MB in the end (delta: -64.4 MB). Peak memory consumption was 39.0 MB. Max. memory is 16.1 GB. [2020-12-09 08:31:51,113 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 98.6 MB. Free memory is still 76.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 183.82 ms. Allocated memory is still 98.6 MB. Free memory was 67.9 MB in the beginning and 57.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.15 ms. Allocated memory is still 98.6 MB. Free memory was 57.4 MB in the beginning and 55.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.82 ms. Allocated memory is still 98.6 MB. Free memory was 55.4 MB in the beginning and 53.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 536.91 ms. Allocated memory is still 98.6 MB. Free memory was 53.8 MB in the beginning and 55.6 MB in the end (delta: -1.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1611.87 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 55.2 MB in the beginning and 119.6 MB in the end (delta: -64.4 MB). Peak memory consumption was 39.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: incompatible size de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: incompatible size: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:210) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 08:31:52,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:31:52,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:31:52,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:31:52,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:31:52,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:31:52,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:31:52,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:31:52,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:31:52,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:31:52,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:31:52,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:31:52,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:31:52,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:31:52,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:31:52,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:31:52,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:31:52,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:31:52,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:31:52,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:31:52,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:31:52,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:31:52,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:31:52,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:31:52,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:31:52,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:31:52,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:31:52,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:31:52,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:31:52,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:31:52,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:31:52,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:31:52,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:31:52,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:31:52,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:31:52,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:31:52,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:31:52,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:31:52,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:31:52,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:31:52,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:31:52,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 08:31:52,928 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:31:52,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:31:52,928 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:31:52,929 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:31:52,929 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:31:52,929 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:31:52,929 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:31:52,929 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:31:52,929 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:31:52,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:31:52,930 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:31:52,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:31:52,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:31:52,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:31:52,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:31:52,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:31:52,931 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:31:52,931 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 08:31:52,931 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 08:31:52,931 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:31:52,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:31:52,931 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:31:52,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:31:52,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:31:52,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 08:31:52,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:31:52,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:31:52,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:31:52,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:31:52,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:31:52,932 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 08:31:52,933 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 08:31:52,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:31:52,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:31:52,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:31:52,933 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417a96bf424eb15cdf3ae2ce282b015c547ba383 [2020-12-09 08:31:53,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:31:53,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:31:53,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:31:53,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:31:53,176 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:31:53,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/../../sv-benchmarks/c/verifythis/duplets.c [2020-12-09 08:31:53,216 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/data/9600a1874/c197b1ba38a5434e8aa15af8b1396852/FLAG67f3a39f2 [2020-12-09 08:31:53,603 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:31:53,604 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/sv-benchmarks/c/verifythis/duplets.c [2020-12-09 08:31:53,609 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/data/9600a1874/c197b1ba38a5434e8aa15af8b1396852/FLAG67f3a39f2 [2020-12-09 08:31:53,618 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/data/9600a1874/c197b1ba38a5434e8aa15af8b1396852 [2020-12-09 08:31:53,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:31:53,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:31:53,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:31:53,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:31:53,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:31:53,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:31:53" (1/1) ... [2020-12-09 08:31:53,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30a58956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53, skipping insertion in model container [2020-12-09 08:31:53,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:31:53" (1/1) ... [2020-12-09 08:31:53,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:31:53,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:31:53,744 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/sv-benchmarks/c/verifythis/duplets.c[485,498] [2020-12-09 08:31:53,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:31:53,775 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:31:53,784 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/sv-benchmarks/c/verifythis/duplets.c[485,498] [2020-12-09 08:31:53,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:31:53,817 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:31:53,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53 WrapperNode [2020-12-09 08:31:53,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:31:53,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:31:53,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:31:53,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:31:53,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53" (1/1) ... [2020-12-09 08:31:53,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53" (1/1) ... [2020-12-09 08:31:53,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:31:53,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:31:53,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:31:53,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:31:53,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53" (1/1) ... [2020-12-09 08:31:53,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53" (1/1) ... [2020-12-09 08:31:53,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53" (1/1) ... [2020-12-09 08:31:53,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53" (1/1) ... [2020-12-09 08:31:53,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53" (1/1) ... [2020-12-09 08:31:53,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53" (1/1) ... [2020-12-09 08:31:53,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53" (1/1) ... [2020-12-09 08:31:53,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:31:53,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:31:53,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:31:53,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:31:53,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:31:53,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 08:31:53,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:31:53,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 08:31:53,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 08:31:53,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:31:53,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:31:53,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 08:31:53,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 08:31:54,284 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:31:54,284 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-09 08:31:54,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:31:54 BoogieIcfgContainer [2020-12-09 08:31:54,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:31:54,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:31:54,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:31:54,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:31:54,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:31:53" (1/3) ... [2020-12-09 08:31:54,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747af597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:31:54, skipping insertion in model container [2020-12-09 08:31:54,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:31:53" (2/3) ... [2020-12-09 08:31:54,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747af597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:31:54, skipping insertion in model container [2020-12-09 08:31:54,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:31:54" (3/3) ... [2020-12-09 08:31:54,292 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2020-12-09 08:31:54,302 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:31:54,305 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-09 08:31:54,313 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-09 08:31:54,335 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:31:54,335 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:31:54,335 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:31:54,335 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:31:54,335 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:31:54,336 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:31:54,336 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:31:54,336 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:31:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-12-09 08:31:54,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 08:31:54,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:31:54,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:31:54,353 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:31:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:31:54,357 INFO L82 PathProgramCache]: Analyzing trace with hash 655320983, now seen corresponding path program 1 times [2020-12-09 08:31:54,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:31:54,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649817384] [2020-12-09 08:31:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 08:31:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:31:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 08:31:54,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:31:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:54,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:31:54,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649817384] [2020-12-09 08:31:54,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:31:54,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:31:54,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17714284] [2020-12-09 08:31:54,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 08:31:54,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:31:54,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 08:31:54,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:31:54,543 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2020-12-09 08:31:54,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:31:54,561 INFO L93 Difference]: Finished difference Result 89 states and 118 transitions. [2020-12-09 08:31:54,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 08:31:54,563 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-09 08:31:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:31:54,570 INFO L225 Difference]: With dead ends: 89 [2020-12-09 08:31:54,570 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 08:31:54,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:31:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 08:31:54,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-09 08:31:54,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 08:31:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-09 08:31:54,601 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 17 [2020-12-09 08:31:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:31:54,601 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-09 08:31:54,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 08:31:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-09 08:31:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 08:31:54,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:31:54,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:31:54,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 08:31:54,805 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:31:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:31:54,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1826916331, now seen corresponding path program 1 times [2020-12-09 08:31:54,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:31:54,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357962316] [2020-12-09 08:31:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 08:31:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:31:55,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 08:31:55,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:31:55,220 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:31:55,227 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:31:55,229 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:31:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:55,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:31:55,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357962316] [2020-12-09 08:31:55,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:31:55,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-09 08:31:55,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69074173] [2020-12-09 08:31:55,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 08:31:55,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:31:55,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 08:31:55,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-09 08:31:55,454 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 11 states. [2020-12-09 08:31:56,024 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2020-12-09 08:31:56,243 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2020-12-09 08:31:56,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:31:56,337 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2020-12-09 08:31:56,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 08:31:56,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-12-09 08:31:56,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:31:56,339 INFO L225 Difference]: With dead ends: 96 [2020-12-09 08:31:56,340 INFO L226 Difference]: Without dead ends: 71 [2020-12-09 08:31:56,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-09 08:31:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-09 08:31:56,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 43. [2020-12-09 08:31:56,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 08:31:56,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-09 08:31:56,348 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 17 [2020-12-09 08:31:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:31:56,348 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-09 08:31:56,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 08:31:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-09 08:31:56,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 08:31:56,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:31:56,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:31:56,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 08:31:56,551 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:31:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:31:56,552 INFO L82 PathProgramCache]: Analyzing trace with hash -756845843, now seen corresponding path program 1 times [2020-12-09 08:31:56,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:31:56,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870722648] [2020-12-09 08:31:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 08:31:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:31:56,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 08:31:56,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:31:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:56,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:31:56,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870722648] [2020-12-09 08:31:56,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:31:56,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:31:56,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30921541] [2020-12-09 08:31:56,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:31:56,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:31:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:31:56,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:31:56,720 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 4 states. [2020-12-09 08:31:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:31:56,766 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-12-09 08:31:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:31:56,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-09 08:31:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:31:56,767 INFO L225 Difference]: With dead ends: 67 [2020-12-09 08:31:56,767 INFO L226 Difference]: Without dead ends: 65 [2020-12-09 08:31:56,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:31:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-09 08:31:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2020-12-09 08:31:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 08:31:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-09 08:31:56,773 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 18 [2020-12-09 08:31:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:31:56,773 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-09 08:31:56,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:31:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-09 08:31:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 08:31:56,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:31:56,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:31:56,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 08:31:56,976 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:31:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:31:56,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1244525418, now seen corresponding path program 1 times [2020-12-09 08:31:56,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:31:56,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902553840] [2020-12-09 08:31:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 08:31:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:31:57,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 08:31:57,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:31:57,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:31:57,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:31:57,289 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:31:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:57,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:31:57,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902553840] [2020-12-09 08:31:57,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:31:57,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-09 08:31:57,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123679362] [2020-12-09 08:31:57,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 08:31:57,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:31:57,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 08:31:57,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-09 08:31:57,525 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 12 states. [2020-12-09 08:31:58,011 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-12-09 08:31:58,151 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2020-12-09 08:31:58,336 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2020-12-09 08:31:58,563 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-12-09 08:31:58,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:31:58,705 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2020-12-09 08:31:58,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 08:31:58,706 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-12-09 08:31:58,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:31:58,708 INFO L225 Difference]: With dead ends: 128 [2020-12-09 08:31:58,708 INFO L226 Difference]: Without dead ends: 96 [2020-12-09 08:31:58,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2020-12-09 08:31:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-09 08:31:58,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 46. [2020-12-09 08:31:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 08:31:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-09 08:31:58,716 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 20 [2020-12-09 08:31:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:31:58,717 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-09 08:31:58,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 08:31:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-09 08:31:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 08:31:58,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:31:58,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:31:58,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 08:31:58,923 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:31:58,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:31:58,925 INFO L82 PathProgramCache]: Analyzing trace with hash 69607633, now seen corresponding path program 1 times [2020-12-09 08:31:58,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:31:58,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661955923] [2020-12-09 08:31:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 08:31:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:31:59,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 08:31:59,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:31:59,124 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 08:31:59,126 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:31:59,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:31:59,136 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:31:59,137 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-09 08:31:59,156 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-12-09 08:31:59,157 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:31:59,165 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:31:59,166 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:31:59,166 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:7 [2020-12-09 08:31:59,175 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:31:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:59,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:31:59,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661955923] [2020-12-09 08:31:59,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:31:59,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 08:31:59,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991234686] [2020-12-09 08:31:59,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 08:31:59,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:31:59,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 08:31:59,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:31:59,185 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2020-12-09 08:31:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:31:59,287 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2020-12-09 08:31:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 08:31:59,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-09 08:31:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:31:59,288 INFO L225 Difference]: With dead ends: 90 [2020-12-09 08:31:59,289 INFO L226 Difference]: Without dead ends: 72 [2020-12-09 08:31:59,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 08:31:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-09 08:31:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-12-09 08:31:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-09 08:31:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-12-09 08:31:59,295 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 22 [2020-12-09 08:31:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:31:59,295 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-12-09 08:31:59,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 08:31:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-12-09 08:31:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 08:31:59,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:31:59,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:31:59,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 08:31:59,497 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:31:59,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:31:59,498 INFO L82 PathProgramCache]: Analyzing trace with hash 69548051, now seen corresponding path program 1 times [2020-12-09 08:31:59,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:31:59,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529549218] [2020-12-09 08:31:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 08:31:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:31:59,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 08:31:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:31:59,657 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 08:31:59,659 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:31:59,671 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:31:59,672 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:31:59,672 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-09 08:31:59,812 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-12-09 08:31:59,813 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:31:59,825 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:31:59,827 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 08:31:59,827 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-09 08:31:59,920 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:31:59,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:31:59,923 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:31:59,924 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:31:59,926 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:31:59,927 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:31:59,929 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 08:31:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:31:59,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:31:59,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529549218] [2020-12-09 08:31:59,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:31:59,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-09 08:31:59,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406536438] [2020-12-09 08:31:59,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 08:31:59,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:31:59,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 08:31:59,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:31:59,959 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 10 states. [2020-12-09 08:32:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:32:00,656 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2020-12-09 08:32:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 08:32:00,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-09 08:32:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:32:00,658 INFO L225 Difference]: With dead ends: 96 [2020-12-09 08:32:00,658 INFO L226 Difference]: Without dead ends: 94 [2020-12-09 08:32:00,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-09 08:32:00,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-09 08:32:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 60. [2020-12-09 08:32:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-09 08:32:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-12-09 08:32:00,664 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 22 [2020-12-09 08:32:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:32:00,665 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-12-09 08:32:00,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 08:32:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-12-09 08:32:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 08:32:00,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:32:00,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:32:00,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 08:32:00,867 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:32:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:32:00,869 INFO L82 PathProgramCache]: Analyzing trace with hash 521545022, now seen corresponding path program 1 times [2020-12-09 08:32:00,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:32:00,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850348084] [2020-12-09 08:32:00,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 08:32:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:32:00,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 08:32:00,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:32:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:32:01,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:32:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:32:01,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850348084] [2020-12-09 08:32:01,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1869435656] [2020-12-09 08:32:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:32:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:32:01,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 08:32:01,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:32:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:32:01,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:32:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:32:01,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696552975] [2020-12-09 08:32:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:32:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:32:01,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 08:32:01,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:32:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:32:01,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:32:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:32:01,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2020-12-09 08:32:01,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7, 8, 7, 6] total 22 [2020-12-09 08:32:01,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696657839] [2020-12-09 08:32:01,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 08:32:01,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:32:01,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 08:32:01,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2020-12-09 08:32:01,621 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 5 states. [2020-12-09 08:32:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:32:01,747 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2020-12-09 08:32:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 08:32:01,747 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-09 08:32:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:32:01,748 INFO L225 Difference]: With dead ends: 108 [2020-12-09 08:32:01,748 INFO L226 Difference]: Without dead ends: 83 [2020-12-09 08:32:01,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2020-12-09 08:32:01,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-09 08:32:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2020-12-09 08:32:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-09 08:32:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-12-09 08:32:01,758 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 23 [2020-12-09 08:32:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:32:01,758 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-12-09 08:32:01,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 08:32:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-12-09 08:32:01,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 08:32:01,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:32:01,759 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:32:02,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:32:02,363 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:32:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:32:02,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1070089447, now seen corresponding path program 1 times [2020-12-09 08:32:02,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:32:02,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565441837] [2020-12-09 08:32:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 08:32:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:32:02,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 08:32:02,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:32:02,513 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 08:32:02,514 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:32:02,529 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:32:02,529 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:32:02,530 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-09 08:32:02,664 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-12-09 08:32:02,665 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:32:02,676 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:32:02,677 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 08:32:02,677 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-09 08:32:02,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:32:02,718 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:32:02,720 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:32:02,720 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:32:02,722 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:32:02,723 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:32:02,725 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 08:32:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:32:02,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:32:02,804 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 150 [2020-12-09 08:32:02,805 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 08:32:02,807 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:32:02,887 INFO L625 ElimStorePlain]: treesize reduction 39, result has 43.5 percent of original size [2020-12-09 08:32:02,888 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-12-09 08:32:02,889 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2020-12-09 08:32:02,889 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:22 [2020-12-09 08:32:03,120 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:32:03,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565441837] [2020-12-09 08:32:03,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [251398540] [2020-12-09 08:32:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:32:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:32:03,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-09 08:32:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:32:03,278 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 08:32:03,279 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:32:03,295 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:32:03,296 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:32:03,296 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-09 08:32:03,487 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-12-09 08:32:03,488 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:32:03,501 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:32:03,502 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:32:03,503 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:17 [2020-12-09 08:32:03,603 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:32:03,604 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:32:03,605 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:32:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:32:03,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:32:03,692 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 324 treesize of output 308 [2020-12-09 08:32:03,694 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:03,695 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:32:03,696 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 08:32:03,700 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:03,701 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 08:32:03,702 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:03,704 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:32:03,704 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:03,705 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 08:32:03,706 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:03,708 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 08:32:03,708 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:03,709 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:03,710 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 08:32:03,710 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:03,718 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:32:03,885 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-12-09 08:32:03,885 INFO L625 ElimStorePlain]: treesize reduction 206, result has 24.5 percent of original size [2020-12-09 08:32:03,886 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 08:32:03,887 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:03,888 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:03,890 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:03,891 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-12-09 08:32:03,892 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:88 [2020-12-09 08:32:04,137 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:32:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:32:04,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:32:04,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 9, 11] total 27 [2020-12-09 08:32:04,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659213954] [2020-12-09 08:32:04,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 08:32:04,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:32:04,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 08:32:04,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-12-09 08:32:04,145 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 9 states. [2020-12-09 08:32:05,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:32:05,246 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2020-12-09 08:32:05,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 08:32:05,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-09 08:32:05,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:32:05,248 INFO L225 Difference]: With dead ends: 102 [2020-12-09 08:32:05,248 INFO L226 Difference]: Without dead ends: 100 [2020-12-09 08:32:05,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2020-12-09 08:32:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-09 08:32:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 58. [2020-12-09 08:32:05,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 08:32:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-12-09 08:32:05,254 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 25 [2020-12-09 08:32:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:32:05,254 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-12-09 08:32:05,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 08:32:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-12-09 08:32:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 08:32:05,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:32:05,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:32:05,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3,12 cvc4 --incremental --print-success --lang smt [2020-12-09 08:32:05,657 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:32:05,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:32:05,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2028181769, now seen corresponding path program 1 times [2020-12-09 08:32:05,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:32:05,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485472067] [2020-12-09 08:32:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-09 08:32:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:32:05,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 08:32:05,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:32:05,783 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:32:05,783 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2020-12-09 08:32:05,784 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:32:05,806 INFO L625 ElimStorePlain]: treesize reduction 16, result has 59.0 percent of original size [2020-12-09 08:32:05,807 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:32:05,807 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:7 [2020-12-09 08:32:05,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:32:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:32:05,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:32:05,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485472067] [2020-12-09 08:32:05,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:32:05,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 08:32:05,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175338880] [2020-12-09 08:32:05,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 08:32:05,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:32:05,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 08:32:05,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 08:32:05,827 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 6 states. [2020-12-09 08:32:05,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:32:05,954 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2020-12-09 08:32:05,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 08:32:05,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-09 08:32:05,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:32:05,955 INFO L225 Difference]: With dead ends: 107 [2020-12-09 08:32:05,955 INFO L226 Difference]: Without dead ends: 95 [2020-12-09 08:32:05,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 08:32:05,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-09 08:32:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2020-12-09 08:32:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-09 08:32:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-12-09 08:32:05,964 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 26 [2020-12-09 08:32:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:32:05,964 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-12-09 08:32:05,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 08:32:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-12-09 08:32:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 08:32:05,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:32:05,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:32:06,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-09 08:32:06,166 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:32:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:32:06,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2028241351, now seen corresponding path program 1 times [2020-12-09 08:32:06,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:32:06,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140706525] [2020-12-09 08:32:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-09 08:32:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:32:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 08:32:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:32:06,422 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:32:06,423 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2020-12-09 08:32:06,424 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:32:06,454 INFO L625 ElimStorePlain]: treesize reduction 16, result has 64.4 percent of original size [2020-12-09 08:32:06,456 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:32:06,456 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:14 [2020-12-09 08:32:06,478 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:32:06,478 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:32:06,479 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:32:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:32:06,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:32:06,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140706525] [2020-12-09 08:32:06,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:32:06,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-09 08:32:06,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167429228] [2020-12-09 08:32:06,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 08:32:06,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:32:06,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 08:32:06,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:32:06,503 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 10 states. [2020-12-09 08:32:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:32:06,944 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-12-09 08:32:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 08:32:06,945 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-12-09 08:32:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:32:06,945 INFO L225 Difference]: With dead ends: 95 [2020-12-09 08:32:06,945 INFO L226 Difference]: Without dead ends: 93 [2020-12-09 08:32:06,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-12-09 08:32:06,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-09 08:32:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 69. [2020-12-09 08:32:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-09 08:32:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-12-09 08:32:06,951 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 26 [2020-12-09 08:32:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:32:06,951 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-12-09 08:32:06,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 08:32:06,951 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-12-09 08:32:06,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 08:32:06,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:32:06,952 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:32:07,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-12-09 08:32:07,152 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:32:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:32:07,153 INFO L82 PathProgramCache]: Analyzing trace with hash -760559199, now seen corresponding path program 2 times [2020-12-09 08:32:07,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:32:07,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335967776] [2020-12-09 08:32:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-09 08:32:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:32:07,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-09 08:32:07,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:32:07,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:32:07,575 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2020-12-09 08:32:07,575 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:32:07,605 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:32:07,608 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 08:32:07,608 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:42 [2020-12-09 08:32:07,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:32:07,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:32:07,852 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:32:07,852 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 54 [2020-12-09 08:32:07,854 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-12-09 08:32:07,855 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:32:07,855 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-09 08:32:07,855 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:32:07,855 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-09 08:32:07,856 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:32:07,858 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-09 08:32:07,966 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-09 08:32:07,966 INFO L625 ElimStorePlain]: treesize reduction 29, result has 68.8 percent of original size [2020-12-09 08:32:07,968 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:32:07,968 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:32:07,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335967776] [2020-12-09 08:32:07,970 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-12-09 08:32:07,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1955453251] [2020-12-09 08:32:07,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:32:08,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 08:32:08,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 08:32:08,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-09 08:32:08,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:32:08,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:32:08,145 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2020-12-09 08:32:08,146 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:32:08,174 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:32:08,176 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 08:32:08,177 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:42 [2020-12-09 08:32:08,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:32:08,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:32:08,245 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:32:08,246 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 62 [2020-12-09 08:32:08,247 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-12-09 08:32:08,247 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:32:08,248 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-09 08:32:08,248 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:32:08,248 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-09 08:32:08,248 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:32:08,250 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-09 08:32:08,348 INFO L625 ElimStorePlain]: treesize reduction 12, result has 85.4 percent of original size [2020-12-09 08:32:08,350 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:32:08,350 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:32:08,351 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-12-09 08:32:08,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323767221] [2020-12-09 08:32:08,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e78800df-5916-49bb-8cba-8f19ce659df3/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:32:08,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 08:32:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 08:32:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-09 08:32:08,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:32:08,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:32:08,441 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2020-12-09 08:32:08,441 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:32:08,469 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:32:08,471 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 08:32:08,471 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:42 [2020-12-09 08:32:08,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:32:08,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:32:08,583 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:32:08,583 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 58 [2020-12-09 08:32:08,585 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-12-09 08:32:08,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:32:08,586 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-09 08:32:08,586 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:32:08,586 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-09 08:32:08,587 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:32:08,589 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-09 08:32:08,707 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-09 08:32:08,707 INFO L625 ElimStorePlain]: treesize reduction 3, result has 95.9 percent of original size [2020-12-09 08:32:08,709 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:32:08,709 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:32:08,710 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-12-09 08:32:08,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:32:08,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 08:32:08,710 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-12-09 08:32:08,710 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:32:09,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt,15 mathsat -unsat_core_generation=3,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:32:09,329 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 08:32:09,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:32:09 BoogieIcfgContainer [2020-12-09 08:32:09,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:32:09,329 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:32:09,329 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:32:09,330 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:32:09,330 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:31:54" (3/4) ... [2020-12-09 08:32:09,332 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 08:32:09,332 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:32:09,333 INFO L168 Benchmark]: Toolchain (without parser) took 15711.80 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 45.5 MB in the beginning and 33.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 50.8 MB. Max. memory is 16.1 GB. [2020-12-09 08:32:09,334 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 79.7 MB. Free memory is still 62.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:32:09,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 196.04 ms. Allocated memory is still 79.7 MB. Free memory was 45.4 MB in the beginning and 63.3 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2020-12-09 08:32:09,334 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.93 ms. Allocated memory is still 79.7 MB. Free memory was 63.3 MB in the beginning and 61.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:32:09,335 INFO L168 Benchmark]: Boogie Preprocessor took 25.28 ms. Allocated memory is still 79.7 MB. Free memory was 61.2 MB in the beginning and 59.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:32:09,335 INFO L168 Benchmark]: RCFGBuilder took 401.57 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 59.6 MB in the beginning and 95.8 MB in the end (delta: -36.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. [2020-12-09 08:32:09,335 INFO L168 Benchmark]: TraceAbstraction took 15042.04 ms. Allocated memory is still 117.4 MB. Free memory was 95.3 MB in the beginning and 33.8 MB in the end (delta: 61.5 MB). Peak memory consumption was 61.0 MB. Max. memory is 16.1 GB. [2020-12-09 08:32:09,335 INFO L168 Benchmark]: Witness Printer took 3.14 ms. Allocated memory is still 117.4 MB. Free memory is still 33.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:32:09,337 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 79.7 MB. Free memory is still 62.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 196.04 ms. Allocated memory is still 79.7 MB. Free memory was 45.4 MB in the beginning and 63.3 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.93 ms. Allocated memory is still 79.7 MB. Free memory was 63.3 MB in the beginning and 61.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.28 ms. Allocated memory is still 79.7 MB. Free memory was 61.2 MB in the beginning and 59.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 401.57 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 59.6 MB in the beginning and 95.8 MB in the end (delta: -36.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15042.04 ms. Allocated memory is still 117.4 MB. Free memory was 95.3 MB in the beginning and 33.8 MB in the end (delta: 61.5 MB). Peak memory consumption was 61.0 MB. Max. memory is 16.1 GB. * Witness Printer took 3.14 ms. Allocated memory is still 117.4 MB. Free memory is still 33.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L49] int n = __VERIFIER_nondet_int(); [L16] COND FALSE !(!cond) [L52] int *a = calloc(n, sizeof(int)); [L20] int i = __VERIFIER_nondet_int(); [L21] int j = __VERIFIER_nondet_int(); [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L27] int x = __VERIFIER_nondet_int(); [L29] a[i] = x [L30] a[j] = x [L56] int i,j; [L34] int i,j; [L36] i=0 [L36] COND TRUE i