./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/Collatz_bounded.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/Collatz_bounded.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P --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 fb8f212b8045dc9be8518316cbae752ce6111a4a93244dc89f86b0ea27a978ef --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:45:50,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:45:50,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:45:50,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:45:50,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:45:50,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:45:50,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:45:50,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:45:50,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:45:50,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:45:50,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:45:50,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:45:50,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:45:50,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:45:50,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:45:50,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:45:50,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:45:50,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:45:50,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:45:50,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:45:50,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:45:50,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:45:50,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:45:50,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:45:50,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:45:50,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:45:50,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:45:50,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:45:50,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:45:50,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:45:50,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:45:50,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:45:50,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:45:50,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:45:50,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:45:50,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:45:50,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:45:50,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:45:50,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:45:50,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:45:50,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:45:50,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-21 00:45:50,963 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:45:50,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:45:50,964 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:45:50,964 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:45:50,965 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:45:50,965 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:45:50,965 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:45:50,965 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:45:50,966 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:45:50,966 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:45:50,966 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:45:50,966 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:45:50,967 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:45:50,967 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:45:50,967 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:45:50,968 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:45:50,968 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:45:50,968 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:45:50,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:45:50,969 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:45:50,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:45:50,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:45:50,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:45:50,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:45:50,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:45:50,971 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-21 00:45:50,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:45:50,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:45:50,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:45:50,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:45:50,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:45:50,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:45:50,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:45:50,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:45:50,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:45:50,973 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:45:50,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:45:50,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:45:50,974 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:45:50,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:45:50,975 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_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb8f212b8045dc9be8518316cbae752ce6111a4a93244dc89f86b0ea27a978ef [2021-11-21 00:45:51,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:45:51,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:45:51,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:45:51,312 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:45:51,313 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:45:51,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/termination-crafted/Collatz_bounded.c [2021-11-21 00:45:51,406 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/data/5f2417ded/28b3a8986ccf4fda8bed3e6b11be7def/FLAG14752f0ce [2021-11-21 00:45:51,928 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:45:51,929 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/sv-benchmarks/c/termination-crafted/Collatz_bounded.c [2021-11-21 00:45:51,936 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/data/5f2417ded/28b3a8986ccf4fda8bed3e6b11be7def/FLAG14752f0ce [2021-11-21 00:45:52,294 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/data/5f2417ded/28b3a8986ccf4fda8bed3e6b11be7def [2021-11-21 00:45:52,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:45:52,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:45:52,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:45:52,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:45:52,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:45:52,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:45:52" (1/1) ... [2021-11-21 00:45:52,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@611f5630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52, skipping insertion in model container [2021-11-21 00:45:52,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:45:52" (1/1) ... [2021-11-21 00:45:52,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:45:52,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:45:52,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:45:52,550 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:45:52,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:45:52,583 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:45:52,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52 WrapperNode [2021-11-21 00:45:52,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:45:52,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:45:52,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:45:52,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:45:52,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52" (1/1) ... [2021-11-21 00:45:52,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52" (1/1) ... [2021-11-21 00:45:52,622 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2021-11-21 00:45:52,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:45:52,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:45:52,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:45:52,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:45:52,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52" (1/1) ... [2021-11-21 00:45:52,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52" (1/1) ... [2021-11-21 00:45:52,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52" (1/1) ... [2021-11-21 00:45:52,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52" (1/1) ... [2021-11-21 00:45:52,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52" (1/1) ... [2021-11-21 00:45:52,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52" (1/1) ... [2021-11-21 00:45:52,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52" (1/1) ... [2021-11-21 00:45:52,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:45:52,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:45:52,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:45:52,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:45:52,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52" (1/1) ... [2021-11-21 00:45:52,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:45:52,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:45:52,685 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:45:52,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:45:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:45:52,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:45:52,834 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:45:52,838 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:45:52,968 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:45:52,986 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:45:52,986 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:45:52,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:45:52 BoogieIcfgContainer [2021-11-21 00:45:52,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:45:52,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:45:52,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:45:52,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:45:52,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:45:52" (1/3) ... [2021-11-21 00:45:52,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6962fcb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:45:52, skipping insertion in model container [2021-11-21 00:45:52,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:45:52" (2/3) ... [2021-11-21 00:45:52,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6962fcb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:45:52, skipping insertion in model container [2021-11-21 00:45:52,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:45:52" (3/3) ... [2021-11-21 00:45:53,001 INFO L111 eAbstractionObserver]: Analyzing ICFG Collatz_bounded.c [2021-11-21 00:45:53,008 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:45:53,008 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-21 00:45:53,070 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:45:53,080 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 [2021-11-21 00:45:53,080 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-21 00:45:53,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-11-21 00:45:53,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:45:53,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:53,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:45:53,107 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:45:53,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:53,114 INFO L85 PathProgramCache]: Analyzing trace with hash 67641555, now seen corresponding path program 1 times [2021-11-21 00:45:53,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:53,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429340907] [2021-11-21 00:45:53,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:53,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:53,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:53,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429340907] [2021-11-21 00:45:53,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429340907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:53,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:45:53,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:45:53,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307603159] [2021-11-21 00:45:53,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:53,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:45:53,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:53,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:45:53,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:45:53,486 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 17 states have internal predecessors, (20), 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 5 states, 4 states have (on average 1.25) internal successors, (5), 5 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) [2021-11-21 00:45:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:53,683 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-11-21 00:45:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:45:53,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 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 [2021-11-21 00:45:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:53,696 INFO L225 Difference]: With dead ends: 34 [2021-11-21 00:45:53,696 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 00:45:53,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:45:53,705 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:53,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:45:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 00:45:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-21 00:45:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 23 states have internal predecessors, (26), 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) [2021-11-21 00:45:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-21 00:45:53,746 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 5 [2021-11-21 00:45:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:53,747 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-21 00:45:53,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 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) [2021-11-21 00:45:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-21 00:45:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:45:53,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:53,749 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:53,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:45:53,749 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:45:53,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:53,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1409696742, now seen corresponding path program 1 times [2021-11-21 00:45:53,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:53,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693213939] [2021-11-21 00:45:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:53,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:53,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:53,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693213939] [2021-11-21 00:45:53,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693213939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:45:53,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491457878] [2021-11-21 00:45:53,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:53,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:45:53,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:45:53,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:45:53,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:45:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:54,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:45:54,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:54,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:54,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491457878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:45:54,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782225519] [2021-11-21 00:45:54,422 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 00:45:54,423 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:45:54,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:45:54,435 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:45:54,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:45:54,932 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:45:55,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1782225519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:55,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:45:55,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4, 3] total 11 [2021-11-21 00:45:55,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677760317] [2021-11-21 00:45:55,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:55,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:45:55,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:55,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:45:55,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:45:55,082 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-11-21 00:45:55,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:55,281 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-11-21 00:45:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:45:55,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) Word has length 11 [2021-11-21 00:45:55,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:55,285 INFO L225 Difference]: With dead ends: 62 [2021-11-21 00:45:55,285 INFO L226 Difference]: Without dead ends: 48 [2021-11-21 00:45:55,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:45:55,288 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:55,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 6 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:45:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-21 00:45:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2021-11-21 00:45:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 35 states have internal predecessors, (40), 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) [2021-11-21 00:45:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-21 00:45:55,300 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 11 [2021-11-21 00:45:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:55,300 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-21 00:45:55,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-11-21 00:45:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-21 00:45:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:45:55,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:55,302 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:55,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:45:55,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:45:55,507 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:45:55,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1591049055, now seen corresponding path program 1 times [2021-11-21 00:45:55,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:55,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172541383] [2021-11-21 00:45:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:55,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:45:55,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:55,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172541383] [2021-11-21 00:45:55,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172541383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:55,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:45:55,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:45:55,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511292725] [2021-11-21 00:45:55,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:55,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:45:55,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:55,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:45:55,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:45:55,607 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-21 00:45:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:45:55,675 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-11-21 00:45:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:45:55,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 15 [2021-11-21 00:45:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:45:55,677 INFO L225 Difference]: With dead ends: 37 [2021-11-21 00:45:55,678 INFO L226 Difference]: Without dead ends: 32 [2021-11-21 00:45:55,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:45:55,680 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:45:55,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:45:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-21 00:45:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-11-21 00:45:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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) [2021-11-21 00:45:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-21 00:45:55,688 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-11-21 00:45:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:45:55,688 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-21 00:45:55,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-21 00:45:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-21 00:45:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:45:55,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:45:55,690 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:45:55,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:45:55,690 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:45:55,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:45:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1591048863, now seen corresponding path program 1 times [2021-11-21 00:45:55,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:45:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020526957] [2021-11-21 00:45:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:55,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:45:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:55,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:45:55,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020526957] [2021-11-21 00:45:55,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020526957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:45:55,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206840897] [2021-11-21 00:45:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:45:55,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:45:55,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:45:55,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:45:55,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:45:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:45:55,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:45:55,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:55,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:45:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:45:56,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206840897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:45:56,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1342857008] [2021-11-21 00:45:56,164 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 00:45:56,164 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:45:56,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:45:56,165 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:45:56,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:46:02,160 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:46:02,312 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:46:02,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:46:02,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 9 [2021-11-21 00:46:02,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70056564] [2021-11-21 00:46:02,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:46:02,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:46:02,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:46:02,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:46:02,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:46:02,316 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 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) [2021-11-21 00:46:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:02,492 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2021-11-21 00:46:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:46:02,492 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 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 15 [2021-11-21 00:46:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:02,494 INFO L225 Difference]: With dead ends: 72 [2021-11-21 00:46:02,494 INFO L226 Difference]: Without dead ends: 71 [2021-11-21 00:46:02,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:46:02,495 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:02,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 2 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:46:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-21 00:46:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2021-11-21 00:46:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 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) [2021-11-21 00:46:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-11-21 00:46:02,505 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 15 [2021-11-21 00:46:02,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:02,505 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-11-21 00:46:02,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 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) [2021-11-21 00:46:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-11-21 00:46:02,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 00:46:02,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:02,512 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:02,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:02,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-21 00:46:02,713 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:46:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:02,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1942598407, now seen corresponding path program 2 times [2021-11-21 00:46:02,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:02,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823661907] [2021-11-21 00:46:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:02,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:02,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:46:02,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823661907] [2021-11-21 00:46:02,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823661907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:46:02,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058889544] [2021-11-21 00:46:02,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:46:02,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:02,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:02,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:46:02,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:46:02,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:46:02,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:46:02,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:46:02,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:46:02,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:46:02,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058889544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:02,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:46:02,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-11-21 00:46:02,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118607159] [2021-11-21 00:46:02,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:02,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:46:02,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:46:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:46:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:46:03,000 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-11-21 00:46:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:03,056 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2021-11-21 00:46:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:46:03,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 27 [2021-11-21 00:46:03,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:03,058 INFO L225 Difference]: With dead ends: 88 [2021-11-21 00:46:03,058 INFO L226 Difference]: Without dead ends: 60 [2021-11-21 00:46:03,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:46:03,060 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:03,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:46:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-21 00:46:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2021-11-21 00:46:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 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) [2021-11-21 00:46:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-11-21 00:46:03,069 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2021-11-21 00:46:03,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:03,070 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-11-21 00:46:03,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-11-21 00:46:03,070 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-11-21 00:46:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 00:46:03,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:03,072 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-11-21 00:46:03,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:03,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:03,287 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:46:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:03,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1952344899, now seen corresponding path program 3 times [2021-11-21 00:46:03,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:03,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718063] [2021-11-21 00:46:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:03,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:03,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:46:03,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718063] [2021-11-21 00:46:03,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:46:03,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730101610] [2021-11-21 00:46:03,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:46:03,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:03,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:03,543 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:46:03,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:46:03,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:46:03,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:46:03,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 00:46:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:04,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:07,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730101610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:46:07,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841124703] [2021-11-21 00:46:07,527 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 00:46:07,528 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:46:07,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:46:07,528 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:46:07,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:46:14,667 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:46:14,851 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:46:14,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:46:14,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 26 [2021-11-21 00:46:14,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267657198] [2021-11-21 00:46:14,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:46:14,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-21 00:46:14,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:46:14,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-21 00:46:14,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 00:46:14,855 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 27 states, 26 states have (on average 3.269230769230769) internal successors, (85), 27 states have internal predecessors, (85), 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) [2021-11-21 00:46:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:15,341 INFO L93 Difference]: Finished difference Result 172 states and 195 transitions. [2021-11-21 00:46:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:46:15,344 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.269230769230769) internal successors, (85), 27 states have internal predecessors, (85), 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 [2021-11-21 00:46:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:15,346 INFO L225 Difference]: With dead ends: 172 [2021-11-21 00:46:15,346 INFO L226 Difference]: Without dead ends: 171 [2021-11-21 00:46:15,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=554, Invalid=1168, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 00:46:15,349 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 136 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:15,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 2 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 131 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2021-11-21 00:46:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-21 00:46:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 78. [2021-11-21 00:46:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 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) [2021-11-21 00:46:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-11-21 00:46:15,377 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 35 [2021-11-21 00:46:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:15,377 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-11-21 00:46:15,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.269230769230769) internal successors, (85), 27 states have internal predecessors, (85), 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) [2021-11-21 00:46:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-11-21 00:46:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 00:46:15,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:15,381 INFO L514 BasicCegarLoop]: trace histogram [15, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1] [2021-11-21 00:46:15,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 00:46:15,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:15,582 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:46:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:15,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1538575371, now seen corresponding path program 4 times [2021-11-21 00:46:15,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:15,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477090758] [2021-11-21 00:46:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:15,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 13 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:16,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:46:16,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477090758] [2021-11-21 00:46:16,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477090758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:46:16,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497239427] [2021-11-21 00:46:16,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:46:16,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:46:16,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:16,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:46:16,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:46:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:16,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 00:46:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:27,293 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_89_41_127| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_93_41_127| Int) (|aux_div_v_ULTIMATE.start_main_~y~0#1_87_61| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_91_41_127| Int)) (let ((.cse0 (div (+ 1 (* |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_93_41_127| 3)) 2))) (and (<= |aux_div_v_ULTIMATE.start_main_~y~0#1_87_61| 255110) (<= |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_91_41_127| (div (+ (* |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_89_41_127| 3) 1) 2)) (<= |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_89_41_127| (div (+ (* |aux_div_v_ULTIMATE.start_main_~y~0#1_87_61| 3) 1) 2)) (< 0 .cse0) (<= |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_93_41_127| (div (+ (* |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_91_41_127| 3) 1) 2)) (<= |c_ULTIMATE.start_main_~y~0#1| .cse0)))) is different from true [2021-11-21 00:46:42,378 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_89_41_127| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_93_41_127| Int) (|aux_div_v_ULTIMATE.start_main_~y~0#1_87_61| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_91_41_127| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_95_41_127| Int)) (let ((.cse0 (div (+ (* |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_95_41_127| 3) 1) 2))) (and (<= |aux_div_v_ULTIMATE.start_main_~y~0#1_87_61| 255110) (<= |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_91_41_127| (div (+ (* |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_89_41_127| 3) 1) 2)) (<= |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_89_41_127| (div (+ (* |aux_div_v_ULTIMATE.start_main_~y~0#1_87_61| 3) 1) 2)) (< 0 .cse0) (<= |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_95_41_127| (div (+ 1 (* |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_93_41_127| 3)) 2)) (<= |c_ULTIMATE.start_main_~y~0#1| .cse0) (<= |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_93_41_127| (div (+ (* |aux_div_aux_mod_v_ULTIMATE.start_main_~y~0#1_91_41_127| 3) 1) 2))))) is different from true [2021-11-21 00:46:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 9 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 85 not checked. [2021-11-21 00:46:42,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 26 proven. 311 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:47,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497239427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:47,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292959806] [2021-11-21 00:47:47,990 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 00:47:47,990 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:47:47,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:47:47,991 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:47:47,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:47:53,260 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:47:53,540 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:47:53,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:47:53,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 23, 16] total 62 [2021-11-21 00:47:53,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101843761] [2021-11-21 00:47:53,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:47:53,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 00:47:53,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:47:53,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 00:47:53,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1565, Invalid=2985, Unknown=14, NotChecked=266, Total=4830 [2021-11-21 00:47:53,546 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 63 states, 62 states have (on average 3.306451612903226) internal successors, (205), 63 states have internal predecessors, (205), 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) [2021-11-21 00:50:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:10,533 INFO L93 Difference]: Finished difference Result 419 states and 482 transitions. [2021-11-21 00:50:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-21 00:50:10,534 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.306451612903226) internal successors, (205), 63 states have internal predecessors, (205), 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 75 [2021-11-21 00:50:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:10,538 INFO L225 Difference]: With dead ends: 419 [2021-11-21 00:50:10,538 INFO L226 Difference]: Without dead ends: 418 [2021-11-21 00:50:10,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 174 SyntacticMatches, 48 SemanticMatches, 93 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 6148 ImplicationChecksByTransitivity, 215.9s TimeCoverageRelationStatistics Valid=2980, Invalid=5550, Unknown=34, NotChecked=366, Total=8930 [2021-11-21 00:50:10,543 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 390 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1747 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:10,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 2 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 290 Invalid, 0 Unknown, 1747 Unchecked, 0.4s Time] [2021-11-21 00:50:10,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-21 00:50:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 184. [2021-11-21 00:50:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.1202185792349726) internal successors, (205), 183 states have internal predecessors, (205), 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) [2021-11-21 00:50:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 205 transitions. [2021-11-21 00:50:10,574 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 205 transitions. Word has length 75 [2021-11-21 00:50:10,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:10,575 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 205 transitions. [2021-11-21 00:50:10,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.306451612903226) internal successors, (205), 63 states have internal predecessors, (205), 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) [2021-11-21 00:50:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 205 transitions. [2021-11-21 00:50:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-21 00:50:10,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:10,584 INFO L514 BasicCegarLoop]: trace histogram [31, 16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1] [2021-11-21 00:50:10,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 00:50:10,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:10,811 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-21 00:50:10,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:10,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1286493595, now seen corresponding path program 5 times [2021-11-21 00:50:10,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:10,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867903607] [2021-11-21 00:50:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:10,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 29 proven. 1546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:12,881 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:12,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867903607] [2021-11-21 00:50:12,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867903607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:50:12,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865136553] [2021-11-21 00:50:12,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:50:12,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:12,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:12,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:12,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de563d38-dfd7-4879-b1ce-ad4637b4199c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process