./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NonTerminationSimple4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NonTerminationSimple4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 45cf92b0c6fea336569aa3c590b09eca22523fff4b1b234a5534ea2e1e74fe84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:29:16,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:29:16,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:29:16,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:29:16,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:29:16,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:29:16,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:29:16,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:29:16,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:29:16,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:29:16,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:29:16,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:29:16,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:29:16,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:29:16,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:29:16,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:29:16,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:29:16,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:29:16,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:29:16,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:29:16,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:29:16,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:29:16,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:29:16,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:29:16,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:29:16,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:29:16,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:29:16,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:29:16,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:29:16,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:29:16,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:29:16,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:29:16,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:29:16,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:29:16,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:29:16,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:29:16,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:29:16,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:29:16,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:29:16,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:29:16,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:29:16,942 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-03 04:29:16,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:29:16,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:29:16,995 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:29:16,995 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:29:16,995 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:29:16,996 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:29:16,996 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:29:16,996 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:29:17,002 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:29:17,003 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:29:17,004 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:29:17,004 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:29:17,004 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:29:17,005 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:29:17,005 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:29:17,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:29:17,006 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:29:17,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:29:17,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:29:17,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:29:17,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:29:17,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:29:17,007 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-03 04:29:17,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:29:17,008 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:29:17,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:29:17,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:29:17,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:29:17,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:29:17,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:29:17,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:29:17,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:29:17,011 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:29:17,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:29:17,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:29:17,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:29:17,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:29:17,012 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45cf92b0c6fea336569aa3c590b09eca22523fff4b1b234a5534ea2e1e74fe84 [2021-11-03 04:29:17,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:29:17,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:29:17,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:29:17,349 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:29:17,350 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:29:17,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/termination-crafted/NonTerminationSimple4.c [2021-11-03 04:29:17,429 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/data/2fb2b6671/bcd34fa661824bd5b3cfe1b0eb98c790/FLAG2b6c2b47c [2021-11-03 04:29:17,947 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:29:17,948 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/sv-benchmarks/c/termination-crafted/NonTerminationSimple4.c [2021-11-03 04:29:17,954 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/data/2fb2b6671/bcd34fa661824bd5b3cfe1b0eb98c790/FLAG2b6c2b47c [2021-11-03 04:29:18,334 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/data/2fb2b6671/bcd34fa661824bd5b3cfe1b0eb98c790 [2021-11-03 04:29:18,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:29:18,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:29:18,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:29:18,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:29:18,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:29:18,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:29:18" (1/1) ... [2021-11-03 04:29:18,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1166e720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18, skipping insertion in model container [2021-11-03 04:29:18,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:29:18" (1/1) ... [2021-11-03 04:29:18,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:29:18,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:29:18,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:29:18,578 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:29:18,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:29:18,632 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:29:18,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18 WrapperNode [2021-11-03 04:29:18,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:29:18,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:29:18,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:29:18,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:29:18,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18" (1/1) ... [2021-11-03 04:29:18,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18" (1/1) ... [2021-11-03 04:29:18,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:29:18,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:29:18,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:29:18,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:29:18,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18" (1/1) ... [2021-11-03 04:29:18,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18" (1/1) ... [2021-11-03 04:29:18,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18" (1/1) ... [2021-11-03 04:29:18,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18" (1/1) ... [2021-11-03 04:29:18,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18" (1/1) ... [2021-11-03 04:29:18,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18" (1/1) ... [2021-11-03 04:29:18,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18" (1/1) ... [2021-11-03 04:29:18,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:29:18,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:29:18,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:29:18,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:29:18,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18" (1/1) ... [2021-11-03 04:29:18,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:29:18,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:29:18,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:29:18,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:29:18,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:29:18,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:29:18,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:29:18,966 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-03 04:29:18,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:29:18 BoogieIcfgContainer [2021-11-03 04:29:18,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:29:18,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:29:18,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:29:18,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:29:18,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:29:18" (1/3) ... [2021-11-03 04:29:18,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2daaa5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:29:18, skipping insertion in model container [2021-11-03 04:29:18,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:29:18" (2/3) ... [2021-11-03 04:29:18,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2daaa5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:29:18, skipping insertion in model container [2021-11-03 04:29:18,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:29:18" (3/3) ... [2021-11-03 04:29:18,979 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTerminationSimple4.c [2021-11-03 04:29:18,985 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:29:18,985 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 04:29:19,045 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:29:19,054 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:29:19,055 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 04:29:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 04:29:19,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:19,077 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 04:29:19,078 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-03 04:29:19,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:19,085 INFO L85 PathProgramCache]: Analyzing trace with hash 957573, now seen corresponding path program 1 times [2021-11-03 04:29:19,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:29:19,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444460357] [2021-11-03 04:29:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:19,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:29:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:19,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:29:19,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444460357] [2021-11-03 04:29:19,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444460357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:19,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:19,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-03 04:29:19,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43511787] [2021-11-03 04:29:19,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:29:19,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:29:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:29:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:29:19,276 INFO L87 Difference]: Start difference. First operand has 9 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:19,329 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2021-11-03 04:29:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:29:19,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-03 04:29:19,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:19,338 INFO L225 Difference]: With dead ends: 9 [2021-11-03 04:29:19,352 INFO L226 Difference]: Without dead ends: 6 [2021-11-03 04:29:19,355 INFO L786 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 [2021-11-03 04:29:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-03 04:29:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-03 04:29:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-03 04:29:19,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-03 04:29:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:19,405 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-03 04:29:19,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-03 04:29:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:29:19,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:19,406 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:29:19,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:29:19,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-03 04:29:19,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash 29684810, now seen corresponding path program 1 times [2021-11-03 04:29:19,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:29:19,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533960691] [2021-11-03 04:29:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:19,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:29:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:19,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:29:19,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533960691] [2021-11-03 04:29:19,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533960691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:19,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:19,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:29:19,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405532651] [2021-11-03 04:29:19,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:29:19,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:29:19,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:29:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:29:19,470 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:19,487 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-11-03 04:29:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:29:19,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 04:29:19,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:19,490 INFO L225 Difference]: With dead ends: 10 [2021-11-03 04:29:19,490 INFO L226 Difference]: Without dead ends: 9 [2021-11-03 04:29:19,492 INFO L786 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 [2021-11-03 04:29:19,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-03 04:29:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-03 04:29:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-03 04:29:19,497 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-03 04:29:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:19,498 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-03 04:29:19,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-03 04:29:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:29:19,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:19,500 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-11-03 04:29:19,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:29:19,502 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-03 04:29:19,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:19,512 INFO L85 PathProgramCache]: Analyzing trace with hash -423045501, now seen corresponding path program 1 times [2021-11-03 04:29:19,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:29:19,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537640403] [2021-11-03 04:29:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:19,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:29:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:19,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:29:19,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537640403] [2021-11-03 04:29:19,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537640403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:29:19,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818143097] [2021-11-03 04:29:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:19,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:29:19,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:29:19,577 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:29:19,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:29:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:19,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:29:19,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:19,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:19,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818143097] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:29:19,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016194538] [2021-11-03 04:29:19,778 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-03 04:29:19,778 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:29:19,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:29:19,787 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:29:19,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:29:19,833 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:29:19,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 04:29:19,868 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-03 04:29:19,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-03 04:29:19,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:19,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:19,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:19,937 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-03 04:29:19,943 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 04:29:19,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:19,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:19,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:19,977 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:29:19,980 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:29:19,986 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:29:19,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:29:19,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:20,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:20,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:20,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:20,062 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:29:20,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:29:20,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:29:20,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-03 04:29:20,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948584130] [2021-11-03 04:29:20,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:29:20,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:29:20,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:29:20,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:29:20,251 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:20,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:20,298 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-03 04:29:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:29:20,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:29:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:20,299 INFO L225 Difference]: With dead ends: 19 [2021-11-03 04:29:20,299 INFO L226 Difference]: Without dead ends: 18 [2021-11-03 04:29:20,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:29:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-03 04:29:20,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-03 04:29:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-11-03 04:29:20,309 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2021-11-03 04:29:20,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:20,309 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-11-03 04:29:20,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-11-03 04:29:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-03 04:29:20,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:20,311 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2021-11-03 04:29:20,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:20,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:29:20,523 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-03 04:29:20,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:20,524 INFO L85 PathProgramCache]: Analyzing trace with hash -861552886, now seen corresponding path program 2 times [2021-11-03 04:29:20,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:29:20,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976571851] [2021-11-03 04:29:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:20,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:29:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:20,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:29:20,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976571851] [2021-11-03 04:29:20,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976571851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:29:20,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796724447] [2021-11-03 04:29:20,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:29:20,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:29:20,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:29:20,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:29:20,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 04:29:20,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:29:20,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:29:20,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:29:20,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:20,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:20,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796724447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:29:20,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2096501435] [2021-11-03 04:29:20,922 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-03 04:29:20,922 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:29:20,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:29:20,923 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:29:20,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:29:20,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:29:20,943 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 04:29:20,950 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-03 04:29:20,953 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-03 04:29:20,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:20,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:20,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:21,001 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-03 04:29:21,004 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 04:29:21,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:21,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:21,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:21,019 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:29:21,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:29:21,029 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:29:21,033 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:29:21,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:21,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:21,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:21,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:21,060 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:29:21,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:29:21,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:29:21,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-03 04:29:21,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461177123] [2021-11-03 04:29:21,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 04:29:21,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:29:21,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 04:29:21,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:29:21,189 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:21,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:21,261 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-03 04:29:21,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:29:21,262 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-03 04:29:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:21,263 INFO L225 Difference]: With dead ends: 37 [2021-11-03 04:29:21,263 INFO L226 Difference]: Without dead ends: 36 [2021-11-03 04:29:21,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:29:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-03 04:29:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-03 04:29:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-11-03 04:29:21,271 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 17 [2021-11-03 04:29:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:21,271 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-11-03 04:29:21,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:21,272 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-11-03 04:29:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-03 04:29:21,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:21,277 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2021-11-03 04:29:21,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:21,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:29:21,505 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-03 04:29:21,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:21,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1546325206, now seen corresponding path program 3 times [2021-11-03 04:29:21,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:29:21,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508419208] [2021-11-03 04:29:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:21,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:29:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:21,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:29:21,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508419208] [2021-11-03 04:29:21,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508419208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:29:21,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657403382] [2021-11-03 04:29:21,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:29:21,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:29:21,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:29:21,693 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:29:21,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 04:29:21,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:29:21,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:29:21,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 04:29:21,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:21,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:22,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657403382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:29:22,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556195592] [2021-11-03 04:29:22,234 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-03 04:29:22,235 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:29:22,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:29:22,235 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:29:22,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:29:22,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:29:22,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 04:29:22,252 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-03 04:29:22,253 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-03 04:29:22,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:22,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:22,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:22,266 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-03 04:29:22,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 04:29:22,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:22,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:22,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:22,286 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:29:22,290 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:29:22,297 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:29:22,303 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:29:22,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:22,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:22,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:22,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:22,322 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:29:22,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:29:22,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:29:22,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-03 04:29:22,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101163868] [2021-11-03 04:29:22,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 04:29:22,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:29:22,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 04:29:22,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2021-11-03 04:29:22,565 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:22,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:22,662 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-11-03 04:29:22,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 04:29:22,663 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-03 04:29:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:22,669 INFO L225 Difference]: With dead ends: 73 [2021-11-03 04:29:22,669 INFO L226 Difference]: Without dead ends: 72 [2021-11-03 04:29:22,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 78 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2021-11-03 04:29:22,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-03 04:29:22,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-03 04:29:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-11-03 04:29:22,691 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 35 [2021-11-03 04:29:22,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:22,691 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-11-03 04:29:22,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:22,692 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-11-03 04:29:22,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:29:22,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:22,694 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2021-11-03 04:29:22,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:22,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-03 04:29:22,895 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-03 04:29:22,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:22,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1240792214, now seen corresponding path program 4 times [2021-11-03 04:29:22,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:29:22,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753228866] [2021-11-03 04:29:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:22,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:29:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:23,256 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:29:23,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753228866] [2021-11-03 04:29:23,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753228866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:29:23,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333474463] [2021-11-03 04:29:23,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 04:29:23,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:29:23,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:29:23,260 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:29:23,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 04:29:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:23,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 04:29:23,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:23,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:24,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333474463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:29:24,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [392815330] [2021-11-03 04:29:24,550 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-03 04:29:24,550 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:29:24,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:29:24,551 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:29:24,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:29:24,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:29:24,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 04:29:24,561 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-03 04:29:24,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-03 04:29:24,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:24,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:24,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:24,574 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-03 04:29:24,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 04:29:24,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:24,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:24,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:24,587 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:29:24,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:29:24,591 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:29:24,593 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:29:24,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:24,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:24,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:24,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:24,602 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:29:25,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:29:25,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:29:25,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-03 04:29:25,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950105460] [2021-11-03 04:29:25,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-03 04:29:25,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:29:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-03 04:29:25,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1138, Invalid=1514, Unknown=0, NotChecked=0, Total=2652 [2021-11-03 04:29:25,089 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:25,284 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2021-11-03 04:29:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-03 04:29:25,285 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:29:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:25,290 INFO L225 Difference]: With dead ends: 145 [2021-11-03 04:29:25,290 INFO L226 Difference]: Without dead ends: 144 [2021-11-03 04:29:25,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 162 SyntacticMatches, 23 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1138, Invalid=1514, Unknown=0, NotChecked=0, Total=2652 [2021-11-03 04:29:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-03 04:29:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-11-03 04:29:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.006993006993007) internal successors, (144), 143 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2021-11-03 04:29:25,327 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 71 [2021-11-03 04:29:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:25,330 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2021-11-03 04:29:25,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2021-11-03 04:29:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-03 04:29:25,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:25,339 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2021-11-03 04:29:25,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:25,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-03 04:29:25,553 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-03 04:29:25,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:25,553 INFO L85 PathProgramCache]: Analyzing trace with hash 437109738, now seen corresponding path program 5 times [2021-11-03 04:29:25,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:29:25,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306935864] [2021-11-03 04:29:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:25,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:29:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:26,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:29:26,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306935864] [2021-11-03 04:29:26,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306935864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:29:26,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849846947] [2021-11-03 04:29:26,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:29:26,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:29:26,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:29:26,706 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:29:26,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 04:29:26,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-03 04:29:26,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:29:26,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:29:26,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:27,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:30,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849846947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:29:30,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1745444783] [2021-11-03 04:29:30,278 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-03 04:29:30,278 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:29:30,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:29:30,279 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:29:30,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:29:30,287 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:29:30,290 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 04:29:30,294 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-03 04:29:30,296 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-03 04:29:30,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:30,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:30,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:30,312 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-03 04:29:30,314 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 04:29:30,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:30,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:30,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:30,335 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:29:30,336 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:29:30,340 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:29:30,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:29:30,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:30,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:30,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:30,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:30,354 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:29:31,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:29:31,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:29:31,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-03 04:29:31,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068808292] [2021-11-03 04:29:31,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-03 04:29:31,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:29:31,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-03 04:29:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4570, Invalid=5330, Unknown=0, NotChecked=0, Total=9900 [2021-11-03 04:29:31,516 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 96 states, 95 states have (on average 3.0) internal successors, (285), 96 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:31,885 INFO L93 Difference]: Finished difference Result 289 states and 336 transitions. [2021-11-03 04:29:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-03 04:29:31,885 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 3.0) internal successors, (285), 96 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-03 04:29:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:31,889 INFO L225 Difference]: With dead ends: 289 [2021-11-03 04:29:31,889 INFO L226 Difference]: Without dead ends: 288 [2021-11-03 04:29:31,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 330 SyntacticMatches, 47 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7137 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4570, Invalid=5330, Unknown=0, NotChecked=0, Total=9900 [2021-11-03 04:29:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-03 04:29:31,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-11-03 04:29:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.0034843205574913) internal successors, (288), 287 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 288 transitions. [2021-11-03 04:29:31,927 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 288 transitions. Word has length 143 [2021-11-03 04:29:31,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:31,928 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 288 transitions. [2021-11-03 04:29:31,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 3.0) internal successors, (285), 96 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:31,930 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 288 transitions. [2021-11-03 04:29:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-03 04:29:31,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:31,944 INFO L513 BasicCegarLoop]: trace histogram [95, 95, 94, 1, 1, 1] [2021-11-03 04:29:31,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:32,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-03 04:29:32,169 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-03 04:29:32,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:32,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1641167638, now seen corresponding path program 6 times [2021-11-03 04:29:32,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:29:32,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71293377] [2021-11-03 04:29:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:32,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:29:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:35,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:29:35,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71293377] [2021-11-03 04:29:35,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71293377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:29:35,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653016626] [2021-11-03 04:29:35,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:29:35,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:29:35,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:29:35,743 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:29:35,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 04:29:35,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:29:35,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:29:36,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-03 04:29:36,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:36,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:46,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653016626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:29:46,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1434335807] [2021-11-03 04:29:46,737 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-03 04:29:46,737 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:29:46,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:29:46,738 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:29:46,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:29:46,740 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:29:46,743 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 04:29:46,761 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-03 04:29:46,762 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-03 04:29:46,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:46,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:46,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:46,773 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-03 04:29:46,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 04:29:46,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:46,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:46,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:46,785 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:29:46,787 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:29:46,791 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:29:46,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:29:46,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:46,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:46,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:46,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:29:46,802 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:29:50,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:29:50,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:29:50,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-11-03 04:29:50,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779518710] [2021-11-03 04:29:50,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-03 04:29:50,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:29:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-03 04:29:50,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18346, Invalid=19874, Unknown=0, NotChecked=0, Total=38220 [2021-11-03 04:29:50,649 INFO L87 Difference]: Start difference. First operand 288 states and 288 transitions. Second operand has 192 states, 191 states have (on average 3.0) internal successors, (573), 192 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:51,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:51,877 INFO L93 Difference]: Finished difference Result 577 states and 672 transitions. [2021-11-03 04:29:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-03 04:29:51,878 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 3.0) internal successors, (573), 192 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2021-11-03 04:29:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:51,881 INFO L225 Difference]: With dead ends: 577 [2021-11-03 04:29:51,881 INFO L226 Difference]: Without dead ends: 576 [2021-11-03 04:29:51,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 666 SyntacticMatches, 95 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28113 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=18346, Invalid=19874, Unknown=0, NotChecked=0, Total=38220 [2021-11-03 04:29:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-03 04:29:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2021-11-03 04:29:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.0017391304347827) internal successors, (576), 575 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 576 transitions. [2021-11-03 04:29:51,904 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 576 transitions. Word has length 287 [2021-11-03 04:29:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:51,905 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 576 transitions. [2021-11-03 04:29:51,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 3.0) internal successors, (573), 192 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:51,906 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 576 transitions. [2021-11-03 04:29:51,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-11-03 04:29:51,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:51,917 INFO L513 BasicCegarLoop]: trace histogram [191, 191, 190, 1, 1, 1] [2021-11-03 04:29:51,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:52,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-03 04:29:52,133 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-03 04:29:52,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1154991850, now seen corresponding path program 7 times [2021-11-03 04:29:52,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:29:52,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190580934] [2021-11-03 04:29:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:52,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:29:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 54435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:04,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:30:04,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190580934] [2021-11-03 04:30:04,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190580934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:30:04,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910138679] [2021-11-03 04:30:04,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 04:30:04,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:30:04,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:30:04,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:30:05,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 04:30:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:05,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-03 04:30:05,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 54435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:07,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 54435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:44,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910138679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:44,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [769273795] [2021-11-03 04:30:44,013 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-03 04:30:44,013 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:30:44,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:30:44,013 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:30:44,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:30:44,033 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:44,035 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 04:30:44,037 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-03 04:30:44,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-03 04:30:44,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:44,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:44,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:44,048 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-03 04:30:44,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 04:30:44,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:44,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:44,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:44,059 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:30:44,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:30:44,062 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:30:44,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:30:44,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:44,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:44,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:44,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:44,070 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:30:58,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:30:58,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:30:58,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2021-11-03 04:30:58,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819958736] [2021-11-03 04:30:58,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-03 04:30:58,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:30:58,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-03 04:30:58,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73546, Invalid=76610, Unknown=0, NotChecked=0, Total=150156 [2021-11-03 04:30:58,452 INFO L87 Difference]: Start difference. First operand 576 states and 576 transitions. Second operand has 384 states, 383 states have (on average 3.0) internal successors, (1149), 384 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:03,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:03,161 INFO L93 Difference]: Finished difference Result 1153 states and 1344 transitions. [2021-11-03 04:31:03,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-03 04:31:03,162 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 3.0) internal successors, (1149), 384 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 575 [2021-11-03 04:31:03,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:03,169 INFO L225 Difference]: With dead ends: 1153 [2021-11-03 04:31:03,169 INFO L226 Difference]: Without dead ends: 1152 [2021-11-03 04:31:03,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1915 GetRequests, 1338 SyntacticMatches, 191 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111537 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=73546, Invalid=76610, Unknown=0, NotChecked=0, Total=150156 [2021-11-03 04:31:03,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-11-03 04:31:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2021-11-03 04:31:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.000868809730669) internal successors, (1152), 1151 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1152 transitions. [2021-11-03 04:31:03,235 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1152 transitions. Word has length 575 [2021-11-03 04:31:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:03,236 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1152 transitions. [2021-11-03 04:31:03,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 3.0) internal successors, (1149), 384 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1152 transitions. [2021-11-03 04:31:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1152 [2021-11-03 04:31:03,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:03,292 INFO L513 BasicCegarLoop]: trace histogram [383, 383, 382, 1, 1, 1] [2021-11-03 04:31:03,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:03,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-03 04:31:03,509 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-03 04:31:03,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2077477610, now seen corresponding path program 8 times [2021-11-03 04:31:03,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:31:03,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10871059] [2021-11-03 04:31:03,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:03,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:31:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 219459 backedges. 0 proven. 219459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:53,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:31:53,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10871059] [2021-11-03 04:31:53,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10871059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:31:53,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84677172] [2021-11-03 04:31:53,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:31:53,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:31:53,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:31:53,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:31:53,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-03 04:31:55,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 383 check-sat command(s) [2021-11-03 04:31:55,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:31:55,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1924 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-03 04:31:55,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 219459 backedges. 0 proven. 219459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:58,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 219459 backedges. 0 proven. 219459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:27,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84677172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:34:27,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969577640] [2021-11-03 04:34:27,328 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-03 04:34:27,328 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:34:27,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:34:27,329 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:34:27,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:34:27,332 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:34:27,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 04:34:27,336 INFO L180 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-11-03 04:34:27,337 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-03 04:34:27,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:34:27,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:34:27,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:34:27,347 INFO L180 QuantifierPusher]: treesize reduction 8, result has 82.6 percent of original size [2021-11-03 04:34:27,349 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 04:34:27,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:34:27,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:34:27,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:34:27,358 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:34:27,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:34:27,362 INFO L180 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-11-03 04:34:27,363 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-03 04:34:27,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:34:27,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:34:27,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:34:27,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:34:27,371 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:35:24,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:35:24,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:35:24,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2021-11-03 04:35:24,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803254255] [2021-11-03 04:35:24,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2021-11-03 04:35:24,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:24,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2021-11-03 04:35:24,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294538, Invalid=300674, Unknown=0, NotChecked=0, Total=595212 [2021-11-03 04:35:24,389 INFO L87 Difference]: Start difference. First operand 1152 states and 1152 transitions. Second operand has 768 states, 767 states have (on average 3.0) internal successors, (2301), 768 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:58,709 INFO L93 Difference]: Finished difference Result 2305 states and 2688 transitions. [2021-11-03 04:35:58,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-11-03 04:35:58,714 INFO L78 Accepts]: Start accepts. Automaton has has 768 states, 767 states have (on average 3.0) internal successors, (2301), 768 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1151 [2021-11-03 04:35:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:58,728 INFO L225 Difference]: With dead ends: 2305 [2021-11-03 04:35:58,729 INFO L226 Difference]: Without dead ends: 2304 [2021-11-03 04:35:58,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3835 GetRequests, 2682 SyntacticMatches, 383 SemanticMatches, 770 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444273 ImplicationChecksByTransitivity, 250.4s TimeCoverageRelationStatistics Valid=294538, Invalid=300674, Unknown=0, NotChecked=0, Total=595212 [2021-11-03 04:35:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-11-03 04:35:58,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2304. [2021-11-03 04:35:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 1.0004342162396873) internal successors, (2304), 2303 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 2304 transitions. [2021-11-03 04:35:58,843 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 2304 transitions. Word has length 1151 [2021-11-03 04:35:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:58,846 INFO L470 AbstractCegarLoop]: Abstraction has 2304 states and 2304 transitions. [2021-11-03 04:35:58,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 768 states, 767 states have (on average 3.0) internal successors, (2301), 768 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 2304 transitions. [2021-11-03 04:35:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2304 [2021-11-03 04:35:58,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:58,887 INFO L513 BasicCegarLoop]: trace histogram [767, 767, 766, 1, 1, 1] [2021-11-03 04:35:58,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:59,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-03 04:35:59,089 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-03 04:35:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:59,089 INFO L85 PathProgramCache]: Analyzing trace with hash 275501802, now seen corresponding path program 9 times [2021-11-03 04:35:59,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:59,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170054247] [2021-11-03 04:35:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:59,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 881283 backedges. 0 proven. 881283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:23,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:39:23,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170054247] [2021-11-03 04:39:23,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170054247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:39:23,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609005068] [2021-11-03 04:39:23,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:39:23,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:39:23,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:39:23,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:39:23,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14a8d04b-f7d5-4093-b344-b763e9f26bec/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-03 04:39:24,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:39:24,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:39:25,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 3844 conjuncts, 768 conjunts are in the unsatisfiable core [2021-11-03 04:39:25,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 881283 backedges. 0 proven. 881283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:31,102 INFO L328 TraceCheckSpWp]: Computing backward predicates...