./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9c20edfd7ede05443471560aa2c7be34d4e8c171 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:25:16,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:25:16,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:25:16,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:25:16,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:25:16,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:25:16,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:25:16,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:25:16,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:25:16,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:25:16,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:25:16,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:25:16,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:25:16,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:25:16,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:25:16,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:25:16,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:25:16,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:25:16,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:25:16,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:25:16,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:25:16,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:25:16,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:25:16,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:25:16,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:25:16,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:25:16,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:25:16,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:25:16,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:25:16,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:25:16,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:25:16,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:25:16,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:25:16,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:25:16,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:25:16,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:25:16,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:25:16,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:25:16,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:25:16,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:25:16,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:25:16,168 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2020-11-30 02:25:16,210 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:25:16,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:25:16,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:25:16,217 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:25:16,217 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:25:16,217 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:25:16,218 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:25:16,218 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:25:16,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:25:16,218 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:25:16,219 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:25:16,220 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:25:16,220 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:25:16,220 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:25:16,220 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:25:16,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:25:16,221 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:25:16,222 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:25:16,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:25:16,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:25:16,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:25:16,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:25:16,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:25:16,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:25:16,223 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-30 02:25:16,223 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:25:16,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:25:16,224 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:25:16,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:25:16,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:25:16,224 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:25:16,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:25:16,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:25:16,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:25:16,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:25:16,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:25:16,226 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:25:16,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:25:16,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:25:16,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:25:16,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:25:16,227 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_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c20edfd7ede05443471560aa2c7be34d4e8c171 [2020-11-30 02:25:16,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:25:16,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:25:16,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:25:16,632 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:25:16,635 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:25:16,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/../../sv-benchmarks/c/bitvector/gcd_4.c [2020-11-30 02:25:16,717 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/data/cf076a90c/c37c9d6b1b3d450ab94c47a640e55c62/FLAG9655ec70a [2020-11-30 02:25:17,278 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:25:17,279 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/sv-benchmarks/c/bitvector/gcd_4.c [2020-11-30 02:25:17,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/data/cf076a90c/c37c9d6b1b3d450ab94c47a640e55c62/FLAG9655ec70a [2020-11-30 02:25:17,632 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/data/cf076a90c/c37c9d6b1b3d450ab94c47a640e55c62 [2020-11-30 02:25:17,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:25:17,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:25:17,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:25:17,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:25:17,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:25:17,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:25:17" (1/1) ... [2020-11-30 02:25:17,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e5e6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17, skipping insertion in model container [2020-11-30 02:25:17,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:25:17" (1/1) ... [2020-11-30 02:25:17,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:25:17,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:25:17,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:25:17,863 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:25:17,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:25:17,894 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:25:17,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17 WrapperNode [2020-11-30 02:25:17,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:25:17,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:25:17,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:25:17,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:25:17,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17" (1/1) ... [2020-11-30 02:25:17,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17" (1/1) ... [2020-11-30 02:25:17,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:25:17,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:25:17,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:25:17,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:25:17,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17" (1/1) ... [2020-11-30 02:25:17,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17" (1/1) ... [2020-11-30 02:25:17,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17" (1/1) ... [2020-11-30 02:25:17,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17" (1/1) ... [2020-11-30 02:25:17,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17" (1/1) ... [2020-11-30 02:25:17,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17" (1/1) ... [2020-11-30 02:25:17,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17" (1/1) ... [2020-11-30 02:25:17,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:25:17,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:25:17,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:25:17,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:25:17,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/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 [2020-11-30 02:25:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:25:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:25:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:25:18,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:25:18,716 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:25:18,716 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-11-30 02:25:18,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:25:18 BoogieIcfgContainer [2020-11-30 02:25:18,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:25:18,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:25:18,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:25:18,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:25:18,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:25:17" (1/3) ... [2020-11-30 02:25:18,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409c8a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:25:18, skipping insertion in model container [2020-11-30 02:25:18,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:25:17" (2/3) ... [2020-11-30 02:25:18,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409c8a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:25:18, skipping insertion in model container [2020-11-30 02:25:18,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:25:18" (3/3) ... [2020-11-30 02:25:18,727 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-11-30 02:25:18,737 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:25:18,742 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-30 02:25:18,752 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-30 02:25:18,772 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:25:18,772 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:25:18,772 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:25:18,772 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:25:18,773 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:25:18,773 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:25:18,773 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:25:18,773 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:25:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-30 02:25:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 02:25:18,788 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:18,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 02:25:18,789 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 02:25:18,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:18,808 INFO L82 PathProgramCache]: Analyzing trace with hash 122208, now seen corresponding path program 1 times [2020-11-30 02:25:18,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:18,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122561473] [2020-11-30 02:25:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:18,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122561473] [2020-11-30 02:25:18,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:18,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:25:18,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22612894] [2020-11-30 02:25:18,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:25:18,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:18,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:25:18,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:25:18,996 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-11-30 02:25:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:19,080 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-11-30 02:25:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:25:19,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 02:25:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:19,089 INFO L225 Difference]: With dead ends: 54 [2020-11-30 02:25:19,089 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 02:25:19,103 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 [2020-11-30 02:25:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 02:25:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2020-11-30 02:25:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 02:25:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-30 02:25:19,141 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 3 [2020-11-30 02:25:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:19,142 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-30 02:25:19,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:25:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-30 02:25:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:25:19,142 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:19,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:25:19,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:25:19,144 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 02:25:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash 3794509, now seen corresponding path program 1 times [2020-11-30 02:25:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:19,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55864373] [2020-11-30 02:25:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:19,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55864373] [2020-11-30 02:25:19,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:19,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:25:19,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187598069] [2020-11-30 02:25:19,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:25:19,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:19,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:25:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:25:19,207 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 3 states. [2020-11-30 02:25:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:19,262 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-11-30 02:25:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:25:19,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:25:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:19,263 INFO L225 Difference]: With dead ends: 39 [2020-11-30 02:25:19,263 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 02:25:19,264 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 [2020-11-30 02:25:19,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 02:25:19,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2020-11-30 02:25:19,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 02:25:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-30 02:25:19,267 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 4 [2020-11-30 02:25:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:19,267 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-30 02:25:19,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:25:19,268 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-30 02:25:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:25:19,268 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:19,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:19,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:25:19,269 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 02:25:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1378972595, now seen corresponding path program 1 times [2020-11-30 02:25:19,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:19,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731933603] [2020-11-30 02:25:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:19,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731933603] [2020-11-30 02:25:19,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:19,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:25:19,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589601841] [2020-11-30 02:25:19,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:25:19,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:19,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:25:19,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:25:19,351 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-11-30 02:25:19,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:19,402 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-11-30 02:25:19,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:25:19,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-30 02:25:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:19,404 INFO L225 Difference]: With dead ends: 28 [2020-11-30 02:25:19,404 INFO L226 Difference]: Without dead ends: 18 [2020-11-30 02:25:19,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:25:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-30 02:25:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-30 02:25:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 02:25:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-30 02:25:19,408 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 7 [2020-11-30 02:25:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:19,408 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-30 02:25:19,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:25:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-30 02:25:19,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:25:19,409 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:19,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:19,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:25:19,410 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 02:25:19,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:19,410 INFO L82 PathProgramCache]: Analyzing trace with hash 809275822, now seen corresponding path program 1 times [2020-11-30 02:25:19,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:19,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041607755] [2020-11-30 02:25:19,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:19,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041607755] [2020-11-30 02:25:19,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697581177] [2020-11-30 02:25:19,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/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 [2020-11-30 02:25:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:19,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 02:25:19,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:25:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:19,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:25:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:19,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:25:19,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2020-11-30 02:25:19,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607086482] [2020-11-30 02:25:19,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:25:19,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:19,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:25:19,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:25:19,680 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-11-30 02:25:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:19,750 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-30 02:25:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:25:19,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-30 02:25:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:19,752 INFO L225 Difference]: With dead ends: 28 [2020-11-30 02:25:19,752 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 02:25:19,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:25:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 02:25:19,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-11-30 02:25:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 02:25:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-11-30 02:25:19,757 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2020-11-30 02:25:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:19,757 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-11-30 02:25:19,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:25:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-11-30 02:25:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:25:19,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:19,758 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:19,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:19,971 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 02:25:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:19,972 INFO L82 PathProgramCache]: Analyzing trace with hash 809276014, now seen corresponding path program 1 times [2020-11-30 02:25:19,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:19,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492831103] [2020-11-30 02:25:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:20,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492831103] [2020-11-30 02:25:20,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510435885] [2020-11-30 02:25:20,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:20,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 02:25:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:25:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:20,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:25:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:20,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2037103304] [2020-11-30 02:25:20,196 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 02:25:20,196 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:25:20,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:25:20,206 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:25:20,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:25:20,762 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:25:20,944 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-11-30 02:25:21,136 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-11-30 02:25:21,328 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-30 02:25:21,537 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-11-30 02:25:21,832 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-11-30 02:25:21,835 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:25:21,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:25:21,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2020-11-30 02:25:21,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313657247] [2020-11-30 02:25:21,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:25:21,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:21,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:25:21,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:25:21,837 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-11-30 02:25:21,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:21,989 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-11-30 02:25:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:25:21,990 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-30 02:25:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:21,992 INFO L225 Difference]: With dead ends: 48 [2020-11-30 02:25:21,992 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 02:25:21,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:25:21,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 02:25:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-11-30 02:25:21,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 02:25:21,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-11-30 02:25:21,999 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 11 [2020-11-30 02:25:21,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:21,999 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-11-30 02:25:21,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:25:22,000 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-11-30 02:25:22,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 02:25:22,000 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:22,001 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:22,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:22,202 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 02:25:22,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:22,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2071099362, now seen corresponding path program 1 times [2020-11-30 02:25:22,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:22,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737088305] [2020-11-30 02:25:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:22,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737088305] [2020-11-30 02:25:22,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370497802] [2020-11-30 02:25:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:22,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:25:22,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:25:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:22,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:25:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:22,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935936245] [2020-11-30 02:25:22,445 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-30 02:25:22,445 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:25:22,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:25:22,445 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:25:22,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:25:23,245 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:25:23,426 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-11-30 02:25:23,665 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-11-30 02:25:23,885 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-11-30 02:25:24,060 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-11-30 02:25:24,229 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-30 02:25:24,385 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-11-30 02:25:24,555 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-30 02:25:24,783 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-11-30 02:25:24,785 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:25:24,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:25:24,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2020-11-30 02:25:24,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052383164] [2020-11-30 02:25:24,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 02:25:24,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:24,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 02:25:24,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-11-30 02:25:24,787 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 11 states. [2020-11-30 02:25:24,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:24,879 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-11-30 02:25:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:25:24,880 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-11-30 02:25:24,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:24,880 INFO L225 Difference]: With dead ends: 45 [2020-11-30 02:25:24,881 INFO L226 Difference]: Without dead ends: 34 [2020-11-30 02:25:24,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-11-30 02:25:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-30 02:25:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-30 02:25:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 02:25:24,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-11-30 02:25:24,886 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2020-11-30 02:25:24,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:24,886 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-11-30 02:25:24,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 02:25:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-11-30 02:25:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 02:25:24,887 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:24,887 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:25,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-30 02:25:25,094 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 02:25:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:25,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1371024223, now seen corresponding path program 2 times [2020-11-30 02:25:25,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:25,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873136022] [2020-11-30 02:25:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:25,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873136022] [2020-11-30 02:25:25,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613361612] [2020-11-30 02:25:25,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:25,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:25:25,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:25:25,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 02:25:25,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:25:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-30 02:25:25,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:25:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-30 02:25:25,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:25:25,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 11 [2020-11-30 02:25:25,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587495704] [2020-11-30 02:25:25,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:25:25,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:25,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:25:25,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-11-30 02:25:25,351 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2020-11-30 02:25:25,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:25,403 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-11-30 02:25:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:25:25,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-11-30 02:25:25,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:25,405 INFO L225 Difference]: With dead ends: 34 [2020-11-30 02:25:25,405 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 02:25:25,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:25:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 02:25:25,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-11-30 02:25:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 02:25:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-30 02:25:25,410 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2020-11-30 02:25:25,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:25,410 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-30 02:25:25,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:25:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-30 02:25:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 02:25:25,415 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:25,415 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:25,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:25,619 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 02:25:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:25,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1548518809, now seen corresponding path program 2 times [2020-11-30 02:25:25,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:25,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947284354] [2020-11-30 02:25:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-30 02:25:25,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947284354] [2020-11-30 02:25:25,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571409206] [2020-11-30 02:25:25,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:25,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:25:25,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:25:25,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 02:25:25,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:25:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-30 02:25:25,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:25:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-30 02:25:25,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043398538] [2020-11-30 02:25:25,882 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-30 02:25:25,882 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:25:25,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:25:25,883 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:25:25,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:25:26,431 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:25:26,603 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-11-30 02:25:26,863 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-11-30 02:25:27,091 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-11-30 02:25:27,263 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-11-30 02:25:27,442 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-30 02:25:27,652 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-11-30 02:25:27,840 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-30 02:25:27,995 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-11-30 02:25:27,996 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:25:27,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:25:27,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2020-11-30 02:25:27,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200468331] [2020-11-30 02:25:27,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 02:25:27,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:27,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 02:25:27,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-30 02:25:27,998 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2020-11-30 02:25:28,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:28,356 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2020-11-30 02:25:28,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-30 02:25:28,357 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-11-30 02:25:28,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:28,358 INFO L225 Difference]: With dead ends: 55 [2020-11-30 02:25:28,358 INFO L226 Difference]: Without dead ends: 53 [2020-11-30 02:25:28,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:25:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-30 02:25:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2020-11-30 02:25:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 02:25:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-11-30 02:25:28,366 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 23 [2020-11-30 02:25:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:28,366 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-11-30 02:25:28,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 02:25:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-11-30 02:25:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-30 02:25:28,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:28,367 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-30 02:25:28,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-30 02:25:28,590 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 02:25:28,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:28,590 INFO L82 PathProgramCache]: Analyzing trace with hash -640527351, now seen corresponding path program 3 times [2020-11-30 02:25:28,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:28,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111176378] [2020-11-30 02:25:28,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:25:28,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111176378] [2020-11-30 02:25:28,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417183533] [2020-11-30 02:25:28,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:28,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:25:28,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:25:28,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 02:25:28,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:25:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:29,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:25:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 56 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:35,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199410658] [2020-11-30 02:25:35,289 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-30 02:25:35,289 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:25:35,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:25:35,290 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:25:35,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:25:35,748 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:25:36,007 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-11-30 02:25:36,374 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-11-30 02:25:36,758 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-11-30 02:25:37,012 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-11-30 02:25:37,288 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-30 02:25:37,565 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-11-30 02:25:37,800 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-30 02:25:37,995 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-11-30 02:25:37,997 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:25:37,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:25:37,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2020-11-30 02:25:37,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839058581] [2020-11-30 02:25:37,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-30 02:25:37,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:37,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-30 02:25:37,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=729, Unknown=4, NotChecked=0, Total=930 [2020-11-30 02:25:37,999 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 23 states. [2020-11-30 02:25:38,758 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-11-30 02:25:39,297 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2020-11-30 02:25:41,955 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2020-11-30 02:25:42,518 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-11-30 02:25:45,353 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-11-30 02:25:47,893 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-11-30 02:25:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:48,503 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-11-30 02:25:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-30 02:25:48,504 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-11-30 02:25:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:48,505 INFO L225 Difference]: With dead ends: 115 [2020-11-30 02:25:48,506 INFO L226 Difference]: Without dead ends: 86 [2020-11-30 02:25:48,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=494, Invalid=1570, Unknown=6, NotChecked=0, Total=2070 [2020-11-30 02:25:48,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-30 02:25:48,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2020-11-30 02:25:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-30 02:25:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-11-30 02:25:48,517 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 31 [2020-11-30 02:25:48,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:48,517 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-11-30 02:25:48,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-30 02:25:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-11-30 02:25:48,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-30 02:25:48,518 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:48,519 INFO L422 BasicCegarLoop]: trace histogram [11, 8, 7, 7, 3, 3, 3, 1, 1, 1, 1, 1] [2020-11-30 02:25:48,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:48,731 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 02:25:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:48,732 INFO L82 PathProgramCache]: Analyzing trace with hash 892126703, now seen corresponding path program 4 times [2020-11-30 02:25:48,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:48,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216358459] [2020-11-30 02:25:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-30 02:25:49,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216358459] [2020-11-30 02:25:49,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165935231] [2020-11-30 02:25:49,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:49,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 02:25:49,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:25:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 93 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-30 02:25:49,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:25:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 91 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-30 02:25:49,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154096244] [2020-11-30 02:25:49,690 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-30 02:25:49,691 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:25:49,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:25:49,691 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:25:49,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:25:50,209 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:25:50,455 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-11-30 02:25:50,872 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-11-30 02:25:51,303 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-11-30 02:25:51,592 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-11-30 02:25:51,862 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-30 02:25:52,124 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-11-30 02:25:52,373 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-11-30 02:25:52,654 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-11-30 02:25:52,656 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:25:52,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:25:52,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2020-11-30 02:25:52,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773819946] [2020-11-30 02:25:52,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-30 02:25:52,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:52,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-30 02:25:52,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2020-11-30 02:25:52,658 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 24 states. [2020-11-30 02:25:53,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:53,347 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-11-30 02:25:53,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:25:53,352 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2020-11-30 02:25:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:53,353 INFO L225 Difference]: With dead ends: 66 [2020-11-30 02:25:53,353 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:25:53,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2020-11-30 02:25:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:25:53,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:25:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:25:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:25:53,355 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2020-11-30 02:25:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:53,355 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:25:53,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-30 02:25:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:25:53,355 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:25:53,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:53,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 02:25:53,836 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2020-11-30 02:25:53,838 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2020-11-30 02:25:53,838 INFO L274 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-11-30 02:25:53,838 INFO L274 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-11-30 02:25:53,838 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-30 02:25:53,838 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-30 02:25:53,838 INFO L274 CegarLoopResult]: For program point L15-3(lines 13 29) no Hoare annotation was computed. [2020-11-30 02:25:53,838 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2020-11-30 02:25:53,838 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-30 02:25:53,838 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 02:25:53,838 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2020-11-30 02:25:53,839 INFO L277 CegarLoopResult]: At program point L28(lines 12 29) the Hoare annotation is: true [2020-11-30 02:25:53,839 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-30 02:25:53,839 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 02:25:53,839 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2020-11-30 02:25:53,839 INFO L274 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-11-30 02:25:53,839 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-30 02:25:53,839 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2020-11-30 02:25:53,839 INFO L274 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-11-30 02:25:53,839 INFO L270 CegarLoopResult]: At program point L22-2(lines 21 27) the Hoare annotation is: (let ((.cse1 (= ULTIMATE.start_gcd_test_~b 18)) (.cse0 (+ ULTIMATE.start_gcd_test_~b ULTIMATE.start_gcd_test_~a)) (.cse4 (<= (div (+ (* ULTIMATE.start_gcd_test_~a (- 1)) 62) 3) 17))) (or (and (<= .cse0 63) (<= 63 .cse0) .cse1) (and (= ULTIMATE.start_gcd_test_~a 63) .cse1) (let ((.cse2 (+ (* 2 ULTIMATE.start_gcd_test_~b) ULTIMATE.start_gcd_test_~a))) (and (<= 63 .cse2) (<= .cse2 63) .cse1)) (let ((.cse3 (+ (* 3 ULTIMATE.start_gcd_test_~b) ULTIMATE.start_gcd_test_~a))) (and (<= .cse3 63) (<= 63 .cse3) .cse1)) (and (<= (+ ULTIMATE.start_gcd_test_~b (* 2 ULTIMATE.start_gcd_test_~a)) 18) .cse4 (<= ULTIMATE.start_gcd_test_~a (+ ULTIMATE.start_gcd_test_~b 9))) (and (<= .cse0 18) (<= (* 6 ULTIMATE.start_gcd_test_~a) (+ (* 5 ULTIMATE.start_gcd_test_~b) 9)) .cse4))) [2020-11-30 02:25:53,839 INFO L274 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-11-30 02:25:53,840 INFO L274 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-11-30 02:25:53,840 INFO L274 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-11-30 02:25:53,840 INFO L274 CegarLoopResult]: For program point L14-4(lines 13 29) no Hoare annotation was computed. [2020-11-30 02:25:53,840 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2020-11-30 02:25:53,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:25:53 BoogieIcfgContainer [2020-11-30 02:25:53,863 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:25:53,864 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:25:53,864 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:25:53,864 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:25:53,865 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:25:18" (3/4) ... [2020-11-30 02:25:53,870 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:25:53,884 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2020-11-30 02:25:53,884 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-30 02:25:53,884 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 02:25:53,885 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 02:25:53,946 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cf41e00c-c1b6-4bc0-bf36-5adf89ca0511/bin/utaipan/witness.graphml [2020-11-30 02:25:53,947 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:25:53,958 INFO L168 Benchmark]: Toolchain (without parser) took 36310.60 ms. Allocated memory was 83.9 MB in the beginning and 211.8 MB in the end (delta: 127.9 MB). Free memory was 51.6 MB in the beginning and 95.8 MB in the end (delta: -44.2 MB). Peak memory consumption was 83.3 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:53,958 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 83.9 MB. Free memory was 56.8 MB in the beginning and 56.8 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:25:53,959 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.63 ms. Allocated memory is still 83.9 MB. Free memory was 51.4 MB in the beginning and 62.3 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:53,960 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.12 ms. Allocated memory is still 83.9 MB. Free memory was 62.3 MB in the beginning and 60.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:53,960 INFO L168 Benchmark]: Boogie Preprocessor took 20.26 ms. Allocated memory is still 83.9 MB. Free memory was 60.9 MB in the beginning and 59.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:25:53,961 INFO L168 Benchmark]: RCFGBuilder took 767.06 ms. Allocated memory is still 83.9 MB. Free memory was 59.5 MB in the beginning and 36.7 MB in the end (delta: 22.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:53,961 INFO L168 Benchmark]: TraceAbstraction took 35143.27 ms. Allocated memory was 83.9 MB in the beginning and 211.8 MB in the end (delta: 127.9 MB). Free memory was 36.4 MB in the beginning and 98.9 MB in the end (delta: -62.5 MB). Peak memory consumption was 67.2 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:53,962 INFO L168 Benchmark]: Witness Printer took 83.02 ms. Allocated memory is still 211.8 MB. Free memory was 98.9 MB in the beginning and 95.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:53,965 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 83.9 MB. Free memory was 56.8 MB in the beginning and 56.8 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 256.63 ms. Allocated memory is still 83.9 MB. Free memory was 51.4 MB in the beginning and 62.3 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.12 ms. Allocated memory is still 83.9 MB. Free memory was 62.3 MB in the beginning and 60.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.26 ms. Allocated memory is still 83.9 MB. Free memory was 60.9 MB in the beginning and 59.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 767.06 ms. Allocated memory is still 83.9 MB. Free memory was 59.5 MB in the beginning and 36.7 MB in the end (delta: 22.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 35143.27 ms. Allocated memory was 83.9 MB in the beginning and 211.8 MB in the end (delta: 127.9 MB). Free memory was 36.4 MB in the beginning and 98.9 MB in the end (delta: -62.5 MB). Peak memory consumption was 67.2 MB. Max. memory is 16.1 GB. * Witness Printer took 83.02 ms. Allocated memory is still 211.8 MB. Free memory was 98.9 MB in the beginning and 95.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((((((b + a <= 63 && 63 <= b + a) && b == 18) || (a == 63 && b == 18)) || ((63 <= 2 * b + a && 2 * b + a <= 63) && b == 18)) || ((3 * b + a <= 63 && 63 <= 3 * b + a) && b == 18)) || ((b + 2 * a <= 18 && (a * -1 + 62) / 3 <= 17) && a <= b + 9)) || ((b + a <= 18 && 6 * a <= 5 * b + 9) && (a * -1 + 62) / 3 <= 17) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 34.7s, OverallIterations: 10, TraceHistogramMax: 11, AutomataDifference: 12.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 333 SDslu, 2 SDs, 0 SdLazy, 831 SolverSat, 143 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 515 GetRequests, 349 SyntacticMatches, 13 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 26.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 60 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 10 NumberOfFragments, 105 HoareAnnotationTreeSize, 2 FomulaSimplifications, 25 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 217 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 344 NumberOfCodeBlocks, 320 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 485 ConstructedInterpolants, 18 QuantifiedInterpolants, 94769 SizeOfPredicates, 30 NumberOfNonLiveVariables, 481 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 24 InterpolantComputations, 5 PerfectInterpolantSequences, 445/921 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...