./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V --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 172ac4fa0310d14c59d9149bc1b8ec1548860e0b827250d611bfd9d710019753 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:16:11,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:16:11,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:16:11,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:16:11,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:16:11,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:16:11,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:16:11,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:16:11,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:16:11,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:16:11,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:16:11,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:16:11,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:16:11,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:16:11,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:16:11,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:16:11,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:16:11,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:16:11,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:16:11,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:16:11,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:16:11,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:16:11,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:16:11,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:16:11,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:16:11,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:16:11,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:16:11,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:16:11,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:16:11,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:16:11,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:16:11,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:16:11,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:16:11,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:16:11,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:16:11,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:16:11,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:16:11,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:16:11,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:16:11,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:16:11,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:16:11,997 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-23 02:16:12,046 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:16:12,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:16:12,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:16:12,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:16:12,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:16:12,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:16:12,058 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:16:12,058 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:16:12,059 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:16:12,059 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:16:12,060 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:16:12,060 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:16:12,061 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:16:12,061 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:16:12,061 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:16:12,061 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:16:12,062 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:16:12,062 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:16:12,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:16:12,063 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:16:12,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:16:12,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:16:12,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:16:12,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:16:12,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:16:12,065 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-23 02:16:12,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:16:12,067 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:16:12,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:16:12,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:16:12,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:16:12,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:16:12,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:16:12,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:16:12,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:16:12,070 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:16:12,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:16:12,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:16:12,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:16:12,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:16:12,071 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_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 172ac4fa0310d14c59d9149bc1b8ec1548860e0b827250d611bfd9d710019753 [2021-11-23 02:16:12,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:16:12,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:16:12,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:16:12,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:16:12,405 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:16:12,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c [2021-11-23 02:16:12,492 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/data/aafda6643/e3164fe938af40a6b525092882e6bbc8/FLAG851c12461 [2021-11-23 02:16:12,944 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:16:12,944 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c [2021-11-23 02:16:12,950 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/data/aafda6643/e3164fe938af40a6b525092882e6bbc8/FLAG851c12461 [2021-11-23 02:16:13,350 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/data/aafda6643/e3164fe938af40a6b525092882e6bbc8 [2021-11-23 02:16:13,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:16:13,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:16:13,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:16:13,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:16:13,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:16:13,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:16:13" (1/1) ... [2021-11-23 02:16:13,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@675c6b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13, skipping insertion in model container [2021-11-23 02:16:13,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:16:13" (1/1) ... [2021-11-23 02:16:13,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:16:13,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:16:13,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:16:13,584 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:16:13,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:16:13,617 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:16:13,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13 WrapperNode [2021-11-23 02:16:13,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:16:13,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:16:13,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:16:13,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:16:13,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13" (1/1) ... [2021-11-23 02:16:13,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13" (1/1) ... [2021-11-23 02:16:13,664 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2021-11-23 02:16:13,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:16:13,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:16:13,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:16:13,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:16:13,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13" (1/1) ... [2021-11-23 02:16:13,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13" (1/1) ... [2021-11-23 02:16:13,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13" (1/1) ... [2021-11-23 02:16:13,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13" (1/1) ... [2021-11-23 02:16:13,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13" (1/1) ... [2021-11-23 02:16:13,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13" (1/1) ... [2021-11-23 02:16:13,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13" (1/1) ... [2021-11-23 02:16:13,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:16:13,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:16:13,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:16:13,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:16:13,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13" (1/1) ... [2021-11-23 02:16:13,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:16:13,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:13,753 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:16:13,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:16:13,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:16:13,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:16:13,882 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:16:13,884 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:16:13,988 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:16:14,009 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:16:14,010 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:16:14,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:16:14 BoogieIcfgContainer [2021-11-23 02:16:14,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:16:14,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:16:14,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:16:14,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:16:14,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:16:13" (1/3) ... [2021-11-23 02:16:14,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea15d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:16:14, skipping insertion in model container [2021-11-23 02:16:14,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:13" (2/3) ... [2021-11-23 02:16:14,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea15d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:16:14, skipping insertion in model container [2021-11-23 02:16:14,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:16:14" (3/3) ... [2021-11-23 02:16:14,031 INFO L111 eAbstractionObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Fig9a.c [2021-11-23 02:16:14,037 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:16:14,037 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-23 02:16:14,088 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:16:14,097 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 [2021-11-23 02:16:14,097 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-23 02:16:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-11-23 02:16:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:16:14,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:14,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:16:14,122 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:14,129 INFO L85 PathProgramCache]: Analyzing trace with hash 71275045, now seen corresponding path program 1 times [2021-11-23 02:16:14,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:14,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729000748] [2021-11-23 02:16:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:14,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:14,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:14,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729000748] [2021-11-23 02:16:14,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729000748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:14,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:14,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:16:14,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886038190] [2021-11-23 02:16:14,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:14,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:16:14,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:14,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:16:14,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:16:14,365 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 13 states have internal predecessors, (16), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2021-11-23 02:16:14,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:14,456 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-23 02:16:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:16:14,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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 [2021-11-23 02:16:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:14,468 INFO L225 Difference]: With dead ends: 28 [2021-11-23 02:16:14,468 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 02:16:14,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:16:14,478 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:14,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 4 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:16:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 02:16:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 02:16:14,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-11-23 02:16:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-23 02:16:14,508 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2021-11-23 02:16:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:14,509 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-23 02:16:14,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2021-11-23 02:16:14,510 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-23 02:16:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:16:14,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:14,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:16:14,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:16:14,511 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:14,512 INFO L85 PathProgramCache]: Analyzing trace with hash 71274263, now seen corresponding path program 1 times [2021-11-23 02:16:14,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:14,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114123701] [2021-11-23 02:16:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:14,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:14,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:14,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114123701] [2021-11-23 02:16:14,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114123701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:14,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:14,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:16:14,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695918227] [2021-11-23 02:16:14,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:14,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:16:14,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:14,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:16:14,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:16:14,563 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:14,597 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-23 02:16:14,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:16:14,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 02:16:14,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:14,598 INFO L225 Difference]: With dead ends: 14 [2021-11-23 02:16:14,599 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 02:16:14,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:16:14,601 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:14,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:16:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 02:16:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-23 02:16:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 10 states have (on average 1.4) internal successors, (14), 12 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) [2021-11-23 02:16:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-23 02:16:14,608 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2021-11-23 02:16:14,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:14,609 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-23 02:16:14,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-23 02:16:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:16:14,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:14,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:16:14,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:16:14,611 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2085465086, now seen corresponding path program 1 times [2021-11-23 02:16:14,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:14,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778876379] [2021-11-23 02:16:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:14,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:14,675 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:14,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778876379] [2021-11-23 02:16:14,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778876379] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:14,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:14,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:16:14,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713332392] [2021-11-23 02:16:14,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:14,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:16:14,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:16:14,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:16:14,679 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:14,720 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-23 02:16:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:16:14,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 02:16:14,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:14,725 INFO L225 Difference]: With dead ends: 14 [2021-11-23 02:16:14,726 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 02:16:14,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:16:14,732 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:14,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:16:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 02:16:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-23 02:16:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-11-23 02:16:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-23 02:16:14,739 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6 [2021-11-23 02:16:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:14,739 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-23 02:16:14,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-23 02:16:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:16:14,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:14,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:14,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:16:14,741 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:14,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1617782066, now seen corresponding path program 1 times [2021-11-23 02:16:14,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:14,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309514355] [2021-11-23 02:16:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:14,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:14,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:14,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309514355] [2021-11-23 02:16:14,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309514355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:14,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:14,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:16:14,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769440244] [2021-11-23 02:16:14,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:14,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:14,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:14,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:14,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:14,793 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-23 02:16:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:14,816 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-23 02:16:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:14,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 02:16:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:14,818 INFO L225 Difference]: With dead ends: 22 [2021-11-23 02:16:14,818 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 02:16:14,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:14,820 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:14,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:16:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 02:16:14,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-23 02:16:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 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) [2021-11-23 02:16:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-23 02:16:14,828 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2021-11-23 02:16:14,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:14,829 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-23 02:16:14,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-23 02:16:14,829 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-23 02:16:14,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:16:14,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:14,830 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:14,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:16:14,831 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:14,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1617781284, now seen corresponding path program 1 times [2021-11-23 02:16:14,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:14,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653178261] [2021-11-23 02:16:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:14,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:14,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:14,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653178261] [2021-11-23 02:16:14,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653178261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:14,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503246055] [2021-11-23 02:16:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:14,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:14,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:14,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:14,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:16:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:14,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:16:14,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:15,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:15,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503246055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:15,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1982659071] [2021-11-23 02:16:15,210 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 02:16:15,210 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:15,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:15,221 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:15,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:15,329 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:15,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1982659071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:15,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:15,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5] total 12 [2021-11-23 02:16:15,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567280782] [2021-11-23 02:16:15,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:15,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:16:15,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:15,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:16:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:16:15,556 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-11-23 02:16:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:15,647 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-11-23 02:16:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:16:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 02:16:15,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:15,656 INFO L225 Difference]: With dead ends: 25 [2021-11-23 02:16:15,656 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 02:16:15,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:16:15,660 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:15,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 2 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 02:16:15,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2021-11-23 02:16:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.25) 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) [2021-11-23 02:16:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-23 02:16:15,678 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2021-11-23 02:16:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:15,679 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-23 02:16:15,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-11-23 02:16:15,680 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-23 02:16:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:16:15,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:15,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 02:16:15,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:15,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:15,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1665828841, now seen corresponding path program 1 times [2021-11-23 02:16:15,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:15,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217520576] [2021-11-23 02:16:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:15,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:16:15,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:15,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217520576] [2021-11-23 02:16:15,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217520576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:15,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229611489] [2021-11-23 02:16:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:15,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:15,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:15,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:15,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:16:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:16,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:16:16,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:16:16,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:16:16,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229611489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1385790392] [2021-11-23 02:16:16,110 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:16:16,111 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:16,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:16,111 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:16,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:16,853 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:17,062 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '409#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~j~0#1|) (< 2147483646 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2021-11-23 02:16:17,062 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:17,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:17,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-23 02:16:17,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559930897] [2021-11-23 02:16:17,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:17,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:16:17,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:17,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:16:17,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:16:17,067 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 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) [2021-11-23 02:16:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:17,114 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-23 02:16:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:16:17,115 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 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 [2021-11-23 02:16:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:17,117 INFO L225 Difference]: With dead ends: 46 [2021-11-23 02:16:17,117 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 02:16:17,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:16:17,123 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:17,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 17 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:16:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 02:16:17,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-11-23 02:16:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 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) [2021-11-23 02:16:17,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-11-23 02:16:17,153 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 15 [2021-11-23 02:16:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:17,155 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-11-23 02:16:17,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 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) [2021-11-23 02:16:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-11-23 02:16:17,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:16:17,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:17,156 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:17,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:17,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:16:17,371 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:17,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:17,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1665828059, now seen corresponding path program 1 times [2021-11-23 02:16:17,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:17,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627409419] [2021-11-23 02:16:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:17,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:17,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:17,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627409419] [2021-11-23 02:16:17,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627409419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:17,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935313847] [2021-11-23 02:16:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:17,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:17,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:17,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:17,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:16:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:17,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:16:17,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:17,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:17,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935313847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:17,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598785286] [2021-11-23 02:16:17,672 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:16:17,672 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:17,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:17,673 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:17,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:18,206 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:18,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '633#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2021-11-23 02:16:18,449 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:18,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:18,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-11-23 02:16:18,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610673167] [2021-11-23 02:16:18,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:18,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:16:18,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:18,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:16:18,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:16:18,451 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 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) [2021-11-23 02:16:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:19,076 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2021-11-23 02:16:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 02:16:19,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 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 [2021-11-23 02:16:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:19,078 INFO L225 Difference]: With dead ends: 78 [2021-11-23 02:16:19,078 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 02:16:19,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=468, Invalid=1884, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 02:16:19,080 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 105 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:19,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 7 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:16:19,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 02:16:19,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-11-23 02:16:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 53 states have internal predecessors, (66), 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) [2021-11-23 02:16:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-23 02:16:19,090 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 15 [2021-11-23 02:16:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:19,090 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-23 02:16:19,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 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) [2021-11-23 02:16:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-23 02:16:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:16:19,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:19,092 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:19,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:19,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:16:19,319 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:19,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:19,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1617614149, now seen corresponding path program 2 times [2021-11-23 02:16:19,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:19,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879597681] [2021-11-23 02:16:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:19,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:16:19,384 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:19,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879597681] [2021-11-23 02:16:19,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879597681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:19,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694909680] [2021-11-23 02:16:19,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:16:19,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:19,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:19,386 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:19,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:16:19,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 02:16:19,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:16:19,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:16:19,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:19,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:19,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694909680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:19,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60685550] [2021-11-23 02:16:19,724 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:16:19,724 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:19,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:19,725 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:19,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:20,200 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:20,432 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1006#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2021-11-23 02:16:20,432 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:20,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:20,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2021-11-23 02:16:20,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165932332] [2021-11-23 02:16:20,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:20,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:16:20,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:20,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:16:20,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:16:20,434 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 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) [2021-11-23 02:16:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:20,733 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2021-11-23 02:16:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:16:20,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 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 21 [2021-11-23 02:16:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:20,734 INFO L225 Difference]: With dead ends: 105 [2021-11-23 02:16:20,734 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 02:16:20,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:16:20,736 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:20,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 02:16:20,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-11-23 02:16:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.2) 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) [2021-11-23 02:16:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-11-23 02:16:20,752 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 21 [2021-11-23 02:16:20,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:20,752 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-11-23 02:16:20,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 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) [2021-11-23 02:16:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-11-23 02:16:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:16:20,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:20,754 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1] [2021-11-23 02:16:20,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:20,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:20,979 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:20,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1051840471, now seen corresponding path program 3 times [2021-11-23 02:16:20,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:20,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763170957] [2021-11-23 02:16:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:20,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:21,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:21,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763170957] [2021-11-23 02:16:21,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763170957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:21,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453011801] [2021-11-23 02:16:21,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:16:21,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:21,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:21,093 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:21,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:16:21,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:16:21,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:16:21,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:16:21,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:21,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:21,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453011801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:21,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1811776011] [2021-11-23 02:16:21,564 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:16:21,564 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:21,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:21,565 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:21,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:21,962 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:22,250 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1412#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2021-11-23 02:16:22,250 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:22,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:22,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2021-11-23 02:16:22,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590179797] [2021-11-23 02:16:22,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:22,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:16:22,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:22,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:16:22,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:16:22,253 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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) [2021-11-23 02:16:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:22,923 INFO L93 Difference]: Finished difference Result 152 states and 176 transitions. [2021-11-23 02:16:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:16:22,923 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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 25 [2021-11-23 02:16:22,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:22,924 INFO L225 Difference]: With dead ends: 152 [2021-11-23 02:16:22,925 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 02:16:22,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=471, Invalid=2079, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 02:16:22,927 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 148 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:22,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:16:22,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 02:16:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2021-11-23 02:16:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 105 states have internal predecessors, (124), 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) [2021-11-23 02:16:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-11-23 02:16:22,943 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 25 [2021-11-23 02:16:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:22,943 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-11-23 02:16:22,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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) [2021-11-23 02:16:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-11-23 02:16:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:16:22,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:22,945 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1] [2021-11-23 02:16:22,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 02:16:23,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:23,159 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1378554212, now seen corresponding path program 4 times [2021-11-23 02:16:23,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:23,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376888701] [2021-11-23 02:16:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:23,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:23,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:23,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376888701] [2021-11-23 02:16:23,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376888701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:23,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265812217] [2021-11-23 02:16:23,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:16:23,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:23,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:23,268 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:23,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:16:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:23,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:16:23,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:23,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:23,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265812217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:23,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1435576375] [2021-11-23 02:16:23,633 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:16:23,633 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:23,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:23,634 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:23,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:23,985 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:24,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1991#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2021-11-23 02:16:24,248 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:24,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:24,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-11-23 02:16:24,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027796843] [2021-11-23 02:16:24,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:24,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 02:16:24,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:24,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 02:16:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:16:24,251 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:26,291 INFO L93 Difference]: Finished difference Result 289 states and 365 transitions. [2021-11-23 02:16:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-23 02:16:26,292 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-23 02:16:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:26,294 INFO L225 Difference]: With dead ends: 289 [2021-11-23 02:16:26,295 INFO L226 Difference]: Without dead ends: 287 [2021-11-23 02:16:26,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3808 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1969, Invalid=9161, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 02:16:26,301 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 143 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:26,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 7 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:16:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-23 02:16:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 200. [2021-11-23 02:16:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 198 states have (on average 1.207070707070707) internal successors, (239), 199 states have internal predecessors, (239), 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) [2021-11-23 02:16:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 239 transitions. [2021-11-23 02:16:26,327 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 239 transitions. Word has length 28 [2021-11-23 02:16:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:26,327 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 239 transitions. [2021-11-23 02:16:26,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 239 transitions. [2021-11-23 02:16:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:16:26,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:26,330 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2021-11-23 02:16:26,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:26,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:16:26,551 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash -378448526, now seen corresponding path program 2 times [2021-11-23 02:16:26,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:26,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563197438] [2021-11-23 02:16:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:26,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 02:16:26,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:26,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563197438] [2021-11-23 02:16:26,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563197438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:26,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368556143] [2021-11-23 02:16:26,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:16:26,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:26,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:26,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:26,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:16:26,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 02:16:26,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:16:26,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:16:26,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 02:16:26,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 02:16:26,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368556143] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:26,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126535525] [2021-11-23 02:16:26,805 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:16:26,805 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:26,805 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:26,806 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:26,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:27,112 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:27,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3027#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~j~0#1|) (< 2147483646 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_main_~k~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2021-11-23 02:16:27,264 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:27,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:27,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2021-11-23 02:16:27,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676225812] [2021-11-23 02:16:27,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:27,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:16:27,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:27,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:16:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:16:27,266 INFO L87 Difference]: Start difference. First operand 200 states and 239 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:27,294 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2021-11-23 02:16:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:16:27,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 02:16:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:27,299 INFO L225 Difference]: With dead ends: 200 [2021-11-23 02:16:27,299 INFO L226 Difference]: Without dead ends: 199 [2021-11-23 02:16:27,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:16:27,300 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:27,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:16:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-23 02:16:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-11-23 02:16:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1864406779661016) internal successors, (210), 177 states have internal predecessors, (210), 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) [2021-11-23 02:16:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 210 transitions. [2021-11-23 02:16:27,322 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 210 transitions. Word has length 36 [2021-11-23 02:16:27,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:27,323 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 210 transitions. [2021-11-23 02:16:27,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:27,323 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 210 transitions. [2021-11-23 02:16:27,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:16:27,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:27,325 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2021-11-23 02:16:27,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 02:16:27,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:27,539 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:27,539 INFO L85 PathProgramCache]: Analyzing trace with hash -378449308, now seen corresponding path program 5 times [2021-11-23 02:16:27,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:27,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410838710] [2021-11-23 02:16:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:27,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:16:27,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:27,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410838710] [2021-11-23 02:16:27,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410838710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:27,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210921615] [2021-11-23 02:16:27,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:16:27,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:27,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:27,643 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:27,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:16:27,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 02:16:27,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:16:27,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:16:27,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:16:27,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:16:27,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210921615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:27,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1008845228] [2021-11-23 02:16:27,955 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:16:27,956 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:27,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:27,956 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:27,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:28,272 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:28,455 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3789#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2021-11-23 02:16:28,455 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:28,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:28,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-11-23 02:16:28,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170708868] [2021-11-23 02:16:28,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:28,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 02:16:28,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:28,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 02:16:28,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:16:28,457 INFO L87 Difference]: Start difference. First operand 178 states and 210 transitions. Second operand has 21 states, 20 states have (on average 3.85) internal successors, (77), 21 states have internal predecessors, (77), 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) [2021-11-23 02:16:29,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:29,895 INFO L93 Difference]: Finished difference Result 1038 states and 1235 transitions. [2021-11-23 02:16:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-23 02:16:29,898 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.85) internal successors, (77), 21 states have internal predecessors, (77), 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 36 [2021-11-23 02:16:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:29,905 INFO L225 Difference]: With dead ends: 1038 [2021-11-23 02:16:29,905 INFO L226 Difference]: Without dead ends: 1037 [2021-11-23 02:16:29,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3109 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1912, Invalid=7018, Unknown=0, NotChecked=0, Total=8930 [2021-11-23 02:16:29,910 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 262 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:29,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 13 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:16:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-11-23 02:16:29,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 325. [2021-11-23 02:16:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.1666666666666667) internal successors, (378), 324 states have internal predecessors, (378), 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) [2021-11-23 02:16:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 378 transitions. [2021-11-23 02:16:29,949 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 378 transitions. Word has length 36 [2021-11-23 02:16:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:29,950 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 378 transitions. [2021-11-23 02:16:29,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.85) internal successors, (77), 21 states have internal predecessors, (77), 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) [2021-11-23 02:16:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 378 transitions. [2021-11-23 02:16:29,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:16:29,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:29,953 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 1, 1, 1] [2021-11-23 02:16:29,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:30,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:16:30,168 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:30,168 INFO L85 PathProgramCache]: Analyzing trace with hash 843837804, now seen corresponding path program 6 times [2021-11-23 02:16:30,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:30,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946796830] [2021-11-23 02:16:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:30,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 47 proven. 140 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:16:30,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:30,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946796830] [2021-11-23 02:16:30,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946796830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:30,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107221194] [2021-11-23 02:16:30,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:16:30,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:30,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:30,323 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:30,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:16:30,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:16:30,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:16:30,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:16:30,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 156 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:16:30,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 10 proven. 173 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:16:31,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107221194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:31,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [762234219] [2021-11-23 02:16:31,029 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:16:31,029 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:31,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:31,029 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:31,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:31,328 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:31,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6118#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~i~0#1|))' at error location [2021-11-23 02:16:31,823 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:31,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:31,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33 [2021-11-23 02:16:31,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991336561] [2021-11-23 02:16:31,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:31,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 02:16:31,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 02:16:31,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 02:16:31,826 INFO L87 Difference]: Start difference. First operand 325 states and 378 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 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) [2021-11-23 02:16:34,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:34,494 INFO L93 Difference]: Finished difference Result 843 states and 989 transitions. [2021-11-23 02:16:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-23 02:16:34,495 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 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 48 [2021-11-23 02:16:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:34,499 INFO L225 Difference]: With dead ends: 843 [2021-11-23 02:16:34,499 INFO L226 Difference]: Without dead ends: 650 [2021-11-23 02:16:34,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3495 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2145, Invalid=10065, Unknown=0, NotChecked=0, Total=12210 [2021-11-23 02:16:34,505 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 250 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:34,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 1 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:16:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-23 02:16:34,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 545. [2021-11-23 02:16:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.1672794117647058) internal successors, (635), 544 states have internal predecessors, (635), 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) [2021-11-23 02:16:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 635 transitions. [2021-11-23 02:16:34,563 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 635 transitions. Word has length 48 [2021-11-23 02:16:34,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:34,564 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 635 transitions. [2021-11-23 02:16:34,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 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) [2021-11-23 02:16:34,564 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 635 transitions. [2021-11-23 02:16:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 02:16:34,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:34,568 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 5, 4, 4, 4, 1, 1, 1] [2021-11-23 02:16:34,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:34,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:16:34,781 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:34,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1389636412, now seen corresponding path program 7 times [2021-11-23 02:16:34,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:34,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864649057] [2021-11-23 02:16:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:34,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 231 proven. 136 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 02:16:34,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:34,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864649057] [2021-11-23 02:16:34,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864649057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:34,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638772520] [2021-11-23 02:16:34,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:16:34,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:34,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:34,949 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:34,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:16:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:34,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:16:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 249 proven. 118 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 02:16:35,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 236 proven. 131 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 02:16:35,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638772520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:35,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1205353546] [2021-11-23 02:16:35,519 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:16:35,519 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:35,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:35,520 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:35,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:35,832 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:36,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8593#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~i~0#1|))' at error location [2021-11-23 02:16:36,323 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:36,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:36,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2021-11-23 02:16:36,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046688548] [2021-11-23 02:16:36,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:36,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 02:16:36,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:36,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 02:16:36,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:16:36,324 INFO L87 Difference]: Start difference. First operand 545 states and 635 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 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) [2021-11-23 02:16:36,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:36,774 INFO L93 Difference]: Finished difference Result 588 states and 687 transitions. [2021-11-23 02:16:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 02:16:36,774 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 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 66 [2021-11-23 02:16:36,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:36,778 INFO L225 Difference]: With dead ends: 588 [2021-11-23 02:16:36,778 INFO L226 Difference]: Without dead ends: 469 [2021-11-23 02:16:36,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=1791, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 02:16:36,780 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:36,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:16:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-23 02:16:36,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 466. [2021-11-23 02:16:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.1548387096774193) internal successors, (537), 465 states have internal predecessors, (537), 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) [2021-11-23 02:16:36,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 537 transitions. [2021-11-23 02:16:36,822 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 537 transitions. Word has length 66 [2021-11-23 02:16:36,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:36,822 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 537 transitions. [2021-11-23 02:16:36,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 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) [2021-11-23 02:16:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 537 transitions. [2021-11-23 02:16:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:16:36,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:36,824 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 7, 7, 7, 1, 1, 1] [2021-11-23 02:16:36,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:37,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:16:37,028 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:37,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1280857771, now seen corresponding path program 8 times [2021-11-23 02:16:37,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:37,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065868910] [2021-11-23 02:16:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:37,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 390 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:16:37,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:37,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065868910] [2021-11-23 02:16:37,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065868910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:37,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421301352] [2021-11-23 02:16:37,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:16:37,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:37,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:37,170 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:37,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:16:37,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-23 02:16:37,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:16:37,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:16:37,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 181 proven. 175 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-23 02:16:37,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 181 proven. 175 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-23 02:16:37,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421301352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:37,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [907169762] [2021-11-23 02:16:37,980 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:16:37,981 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:37,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:37,981 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:37,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:38,262 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:38,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10537#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~i~0#1|))' at error location [2021-11-23 02:16:38,823 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:38,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:38,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 36 [2021-11-23 02:16:38,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949555987] [2021-11-23 02:16:38,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:38,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 02:16:38,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:38,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 02:16:38,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 02:16:38,826 INFO L87 Difference]: Start difference. First operand 466 states and 537 transitions. Second operand has 37 states, 36 states have (on average 4.027777777777778) internal successors, (145), 37 states have internal predecessors, (145), 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) [2021-11-23 02:16:53,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:53,954 INFO L93 Difference]: Finished difference Result 1449 states and 1739 transitions. [2021-11-23 02:16:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2021-11-23 02:16:53,954 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.027777777777778) internal successors, (145), 37 states have internal predecessors, (145), 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 69 [2021-11-23 02:16:53,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:53,962 INFO L225 Difference]: With dead ends: 1449 [2021-11-23 02:16:53,962 INFO L226 Difference]: Without dead ends: 1448 [2021-11-23 02:16:53,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52015 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=19982, Invalid=93924, Unknown=0, NotChecked=0, Total=113906 [2021-11-23 02:16:53,977 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 2175 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 1437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2175 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1437 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:53,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2175 Valid, 2 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1437 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 02:16:53,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-11-23 02:16:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 763. [2021-11-23 02:16:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 1.1797900262467191) internal successors, (899), 762 states have internal predecessors, (899), 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) [2021-11-23 02:16:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 899 transitions. [2021-11-23 02:16:54,057 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 899 transitions. Word has length 69 [2021-11-23 02:16:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:54,058 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 899 transitions. [2021-11-23 02:16:54,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.027777777777778) internal successors, (145), 37 states have internal predecessors, (145), 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) [2021-11-23 02:16:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 899 transitions. [2021-11-23 02:16:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 02:16:54,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:54,060 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 1, 1, 1] [2021-11-23 02:16:54,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:54,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:54,273 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:16:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:54,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2003326660, now seen corresponding path program 9 times [2021-11-23 02:16:54,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:54,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392435261] [2021-11-23 02:16:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:54,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:16:54,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:54,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392435261] [2021-11-23 02:16:54,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392435261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:54,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622450387] [2021-11-23 02:16:54,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:16:54,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:54,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:54,421 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:54,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:16:54,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:16:54,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:16:54,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:16:54,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:16:54,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:16:55,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622450387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:55,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [180527012] [2021-11-23 02:16:55,023 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:16:55,023 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:55,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:55,024 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:55,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:55,311 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:55,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14668#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~i~0#1|))' at error location [2021-11-23 02:16:55,765 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:55,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:55,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-11-23 02:16:55,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108651155] [2021-11-23 02:16:55,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:55,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 02:16:55,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:55,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 02:16:55,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 02:16:55,768 INFO L87 Difference]: Start difference. First operand 763 states and 899 transitions. Second operand has 33 states, 32 states have (on average 5.03125) internal successors, (161), 33 states have internal predecessors, (161), 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) [2021-11-23 02:17:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:00,320 INFO L93 Difference]: Finished difference Result 6637 states and 7942 transitions. [2021-11-23 02:17:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-23 02:17:00,330 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.03125) internal successors, (161), 33 states have internal predecessors, (161), 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 78 [2021-11-23 02:17:00,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:00,363 INFO L225 Difference]: With dead ends: 6637 [2021-11-23 02:17:00,363 INFO L226 Difference]: Without dead ends: 6636 [2021-11-23 02:17:00,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17255 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9154, Invalid=32258, Unknown=0, NotChecked=0, Total=41412 [2021-11-23 02:17:00,368 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 603 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:00,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 22 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:17:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6636 states. [2021-11-23 02:17:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6636 to 2719. [2021-11-23 02:17:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2718 states have (on average 1.1707137601177335) internal successors, (3182), 2718 states have internal predecessors, (3182), 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) [2021-11-23 02:17:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 3182 transitions. [2021-11-23 02:17:00,641 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 3182 transitions. Word has length 78 [2021-11-23 02:17:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:00,641 INFO L470 AbstractCegarLoop]: Abstraction has 2719 states and 3182 transitions. [2021-11-23 02:17:00,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.03125) internal successors, (161), 33 states have internal predecessors, (161), 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) [2021-11-23 02:17:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 3182 transitions. [2021-11-23 02:17:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 02:17:00,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:00,647 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 17, 16, 16, 16, 1, 1, 1] [2021-11-23 02:17:00,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:00,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:17:00,863 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:17:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:00,863 INFO L85 PathProgramCache]: Analyzing trace with hash -958690084, now seen corresponding path program 10 times [2021-11-23 02:17:00,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:00,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272287711] [2021-11-23 02:17:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:00,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2051 backedges. 0 proven. 1364 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2021-11-23 02:17:01,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:01,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272287711] [2021-11-23 02:17:01,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272287711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:01,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391661351] [2021-11-23 02:17:01,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:17:01,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:01,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:01,120 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:01,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:17:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:01,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:17:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2051 backedges. 911 proven. 1069 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 02:17:01,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2051 backedges. 900 proven. 1080 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 02:17:02,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391661351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:02,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259636903] [2021-11-23 02:17:02,450 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:17:02,450 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:17:02,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:17:02,451 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:17:02,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:17:02,795 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:17:03,069 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28823#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2021-11-23 02:17:03,070 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:17:03,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:17:03,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 23] total 42 [2021-11-23 02:17:03,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540997050] [2021-11-23 02:17:03,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:17:03,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 02:17:03,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:03,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 02:17:03,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2057, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 02:17:03,073 INFO L87 Difference]: Start difference. First operand 2719 states and 3182 transitions. Second operand has 42 states, 42 states have (on average 4.761904761904762) internal successors, (200), 42 states have internal predecessors, (200), 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) [2021-11-23 02:17:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:13,408 INFO L93 Difference]: Finished difference Result 5393 states and 6338 transitions. [2021-11-23 02:17:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 318 states. [2021-11-23 02:17:13,409 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.761904761904762) internal successors, (200), 42 states have internal predecessors, (200), 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 150 [2021-11-23 02:17:13,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:13,424 INFO L225 Difference]: With dead ends: 5393 [2021-11-23 02:17:13,425 INFO L226 Difference]: Without dead ends: 3358 [2021-11-23 02:17:13,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 415 SyntacticMatches, 1 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50585 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=13919, Invalid=111043, Unknown=0, NotChecked=0, Total=124962 [2021-11-23 02:17:13,435 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 420 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:13,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 1 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:17:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-11-23 02:17:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 3036. [2021-11-23 02:17:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3036 states, 3035 states have (on average 1.1499176276771006) internal successors, (3490), 3035 states have internal predecessors, (3490), 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) [2021-11-23 02:17:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 3490 transitions. [2021-11-23 02:17:13,775 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 3490 transitions. Word has length 150 [2021-11-23 02:17:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:13,776 INFO L470 AbstractCegarLoop]: Abstraction has 3036 states and 3490 transitions. [2021-11-23 02:17:13,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.761904761904762) internal successors, (200), 42 states have internal predecessors, (200), 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) [2021-11-23 02:17:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 3490 transitions. [2021-11-23 02:17:13,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-23 02:17:13,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:13,785 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 18, 17, 17, 17, 1, 1, 1] [2021-11-23 02:17:13,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:14,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 02:17:14,011 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:17:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:14,011 INFO L85 PathProgramCache]: Analyzing trace with hash 22000467, now seen corresponding path program 11 times [2021-11-23 02:17:14,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:14,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812880437] [2021-11-23 02:17:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:14,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1556 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-23 02:17:14,208 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:14,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812880437] [2021-11-23 02:17:14,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812880437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:14,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355648905] [2021-11-23 02:17:14,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:17:14,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:14,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:14,210 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:14,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:17:14,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-11-23 02:17:14,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:17:14,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:17:14,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 969 proven. 1027 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-23 02:17:14,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 969 proven. 1027 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-23 02:17:15,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355648905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:15,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815739535] [2021-11-23 02:17:15,775 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:17:15,776 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:17:15,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:17:15,776 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:17:15,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:17:16,111 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:17:16,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42083#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2021-11-23 02:17:16,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:17:16,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:17:16,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 50 [2021-11-23 02:17:16,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582369219] [2021-11-23 02:17:16,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:17:16,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 02:17:16,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:16,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 02:17:16,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=2759, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 02:17:16,479 INFO L87 Difference]: Start difference. First operand 3036 states and 3490 transitions. Second operand has 51 states, 50 states have (on average 4.9) internal successors, (245), 51 states have internal predecessors, (245), 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) [2021-11-23 02:17:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:57,392 INFO L93 Difference]: Finished difference Result 8111 states and 9603 transitions. [2021-11-23 02:17:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 581 states. [2021-11-23 02:17:57,392 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.9) internal successors, (245), 51 states have internal predecessors, (245), 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 157 [2021-11-23 02:17:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:57,422 INFO L225 Difference]: With dead ends: 8111 [2021-11-23 02:17:57,422 INFO L226 Difference]: Without dead ends: 8110 [2021-11-23 02:17:57,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 630 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196790 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=73674, Invalid=325118, Unknown=0, NotChecked=0, Total=398792 [2021-11-23 02:17:57,443 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 3889 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 2615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3889 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 3795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2615 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:57,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3889 Valid, 1 Invalid, 3795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2615 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 02:17:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8110 states. [2021-11-23 02:17:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8110 to 3187. [2021-11-23 02:17:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3187 states, 3186 states have (on average 1.155367231638418) internal successors, (3681), 3186 states have internal predecessors, (3681), 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) [2021-11-23 02:17:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3187 states to 3187 states and 3681 transitions. [2021-11-23 02:17:58,150 INFO L78 Accepts]: Start accepts. Automaton has 3187 states and 3681 transitions. Word has length 157 [2021-11-23 02:17:58,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:58,150 INFO L470 AbstractCegarLoop]: Abstraction has 3187 states and 3681 transitions. [2021-11-23 02:17:58,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.9) internal successors, (245), 51 states have internal predecessors, (245), 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) [2021-11-23 02:17:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3187 states and 3681 transitions. [2021-11-23 02:17:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-23 02:17:58,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:58,156 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 22, 1, 1, 1] [2021-11-23 02:17:58,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:58,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 02:17:58,371 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:17:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:58,371 INFO L85 PathProgramCache]: Analyzing trace with hash -38144124, now seen corresponding path program 12 times [2021-11-23 02:17:58,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:58,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346802368] [2021-11-23 02:17:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:58,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 0 proven. 2257 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:17:58,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:58,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346802368] [2021-11-23 02:17:58,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346802368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:58,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78293138] [2021-11-23 02:17:58,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:17:58,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:58,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:58,752 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:58,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:17:58,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:17:58,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:17:58,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 02:17:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 0 proven. 2257 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:17:59,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 0 proven. 2257 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:18:00,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78293138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:00,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949868956] [2021-11-23 02:18:00,174 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:18:00,174 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:18:00,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:18:00,175 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:18:00,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:18:00,498 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:18:00,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59837#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2021-11-23 02:18:00,783 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:18:00,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:18:00,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 56 [2021-11-23 02:18:00,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133359699] [2021-11-23 02:18:00,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:00,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-23 02:18:00,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:00,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-23 02:18:00,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=2800, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 02:18:00,786 INFO L87 Difference]: Start difference. First operand 3187 states and 3681 transitions. Second operand has 57 states, 56 states have (on average 5.875) internal successors, (329), 57 states have internal predecessors, (329), 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) [2021-11-23 02:18:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:19,329 INFO L93 Difference]: Finished difference Result 40994 states and 48938 transitions. [2021-11-23 02:18:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 406 states. [2021-11-23 02:18:19,329 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 5.875) internal successors, (329), 57 states have internal predecessors, (329), 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 162 [2021-11-23 02:18:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:19,449 INFO L225 Difference]: With dead ends: 40994 [2021-11-23 02:18:19,450 INFO L226 Difference]: Without dead ends: 40993 [2021-11-23 02:18:19,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76679 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=39703, Invalid=135439, Unknown=0, NotChecked=0, Total=175142 [2021-11-23 02:18:19,467 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1149 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:19,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 39 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:18:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40993 states. [2021-11-23 02:18:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40993 to 14980. [2021-11-23 02:18:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14980 states, 14979 states have (on average 1.1738433807330262) internal successors, (17583), 14979 states have internal predecessors, (17583), 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) [2021-11-23 02:18:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14980 states to 14980 states and 17583 transitions. [2021-11-23 02:18:20,968 INFO L78 Accepts]: Start accepts. Automaton has 14980 states and 17583 transitions. Word has length 162 [2021-11-23 02:18:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:20,968 INFO L470 AbstractCegarLoop]: Abstraction has 14980 states and 17583 transitions. [2021-11-23 02:18:20,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 5.875) internal successors, (329), 57 states have internal predecessors, (329), 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) [2021-11-23 02:18:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 14980 states and 17583 transitions. [2021-11-23 02:18:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-23 02:18:20,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:20,992 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 31, 30, 30, 30, 1, 1, 1] [2021-11-23 02:18:21,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:21,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:21,207 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:18:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:21,207 INFO L85 PathProgramCache]: Analyzing trace with hash -57870388, now seen corresponding path program 13 times [2021-11-23 02:18:21,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:21,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7126299] [2021-11-23 02:18:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:21,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7630 backedges. 0 proven. 3521 refuted. 0 times theorem prover too weak. 4109 trivial. 0 not checked. [2021-11-23 02:18:21,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:21,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7126299] [2021-11-23 02:18:21,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7126299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:18:21,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643915504] [2021-11-23 02:18:21,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:18:21,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:21,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:21,495 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:21,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 02:18:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:21,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:18:21,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7630 backedges. 4489 proven. 1688 refuted. 0 times theorem prover too weak. 1453 trivial. 0 not checked. [2021-11-23 02:18:22,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7630 backedges. 4474 proven. 1703 refuted. 0 times theorem prover too weak. 1453 trivial. 0 not checked. [2021-11-23 02:18:23,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643915504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:23,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278744343] [2021-11-23 02:18:23,520 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:18:23,520 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:18:23,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:18:23,521 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:18:23,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:18:23,772 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:18:24,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '139440#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~i~0#1|))' at error location [2021-11-23 02:18:24,334 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:18:24,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:18:24,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27, 27] total 48 [2021-11-23 02:18:24,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119829470] [2021-11-23 02:18:24,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:24,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 02:18:24,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:24,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 02:18:24,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2677, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:18:24,337 INFO L87 Difference]: Start difference. First operand 14980 states and 17583 transitions. Second operand has 48 states, 48 states have (on average 5.041666666666667) internal successors, (242), 48 states have internal predecessors, (242), 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) [2021-11-23 02:18:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:42,815 INFO L93 Difference]: Finished difference Result 28870 states and 34023 transitions. [2021-11-23 02:18:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 513 states. [2021-11-23 02:18:42,816 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.041666666666667) internal successors, (242), 48 states have internal predecessors, (242), 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 284 [2021-11-23 02:18:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:42,852 INFO L225 Difference]: With dead ends: 28870 [2021-11-23 02:18:42,853 INFO L226 Difference]: Without dead ends: 15715 [2021-11-23 02:18:42,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1365 GetRequests, 812 SyntacticMatches, 1 SemanticMatches, 552 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134841 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=32057, Invalid=274305, Unknown=0, NotChecked=0, Total=306362 [2021-11-23 02:18:42,888 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 528 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2758 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 3137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 2758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:42,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 1 Invalid, 3137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 2758 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 02:18:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15715 states. [2021-11-23 02:18:44,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15715 to 15006. [2021-11-23 02:18:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15006 states, 15005 states have (on average 1.16974341886038) internal successors, (17552), 15005 states have internal predecessors, (17552), 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) [2021-11-23 02:18:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15006 states to 15006 states and 17552 transitions. [2021-11-23 02:18:44,230 INFO L78 Accepts]: Start accepts. Automaton has 15006 states and 17552 transitions. Word has length 284 [2021-11-23 02:18:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:44,231 INFO L470 AbstractCegarLoop]: Abstraction has 15006 states and 17552 transitions. [2021-11-23 02:18:44,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.041666666666667) internal successors, (242), 48 states have internal predecessors, (242), 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) [2021-11-23 02:18:44,231 INFO L276 IsEmpty]: Start isEmpty. Operand 15006 states and 17552 transitions. [2021-11-23 02:18:44,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-23 02:18:44,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:44,257 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 54, 32, 31, 31, 31, 1, 1, 1] [2021-11-23 02:18:44,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-23 02:18:44,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:44,471 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:18:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2110241027, now seen corresponding path program 14 times [2021-11-23 02:18:44,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:44,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563935439] [2021-11-23 02:18:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:44,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 0 proven. 3887 refuted. 0 times theorem prover too weak. 4110 trivial. 0 not checked. [2021-11-23 02:18:44,753 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:44,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563935439] [2021-11-23 02:18:44,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563935439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:18:44,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882198827] [2021-11-23 02:18:44,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:18:44,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:44,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:44,755 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:44,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 02:18:44,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2021-11-23 02:18:44,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:18:44,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 02:18:44,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 2659 proven. 4891 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-23 02:18:46,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 2659 proven. 4891 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-23 02:18:48,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882198827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:48,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1845055976] [2021-11-23 02:18:48,301 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:18:48,301 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:18:48,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:18:48,302 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:18:48,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:18:48,647 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:18:49,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '203052#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~i~0#1|))' at error location [2021-11-23 02:18:49,242 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:18:49,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:18:49,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30, 30] total 76 [2021-11-23 02:18:49,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086872073] [2021-11-23 02:18:49,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:49,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-23 02:18:49,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:49,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-23 02:18:49,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1625, Invalid=5515, Unknown=0, NotChecked=0, Total=7140 [2021-11-23 02:18:49,245 INFO L87 Difference]: Start difference. First operand 15006 states and 17552 transitions. Second operand has 77 states, 76 states have (on average 5.618421052631579) internal successors, (427), 77 states have internal predecessors, (427), 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) [2021-11-23 02:21:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:09,441 INFO L93 Difference]: Finished difference Result 49419 states and 59062 transitions. [2021-11-23 02:21:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1186 states. [2021-11-23 02:21:09,442 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 5.618421052631579) internal successors, (427), 77 states have internal predecessors, (427), 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 291 [2021-11-23 02:21:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:09,524 INFO L225 Difference]: With dead ends: 49419 [2021-11-23 02:21:09,524 INFO L226 Difference]: Without dead ends: 49418 [2021-11-23 02:21:09,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2092 GetRequests, 830 SyntacticMatches, 0 SemanticMatches, 1262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843229 ImplicationChecksByTransitivity, 130.7s TimeCoverageRelationStatistics Valid=308078, Invalid=1288354, Unknown=0, NotChecked=0, Total=1596432 [2021-11-23 02:21:09,641 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 7283 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 5473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7283 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 7453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5473 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:09,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7283 Valid, 1 Invalid, 7453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5473 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-23 02:21:09,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49418 states. [2021-11-23 02:21:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49418 to 18674. [2021-11-23 02:21:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18674 states, 18673 states have (on average 1.1712097681143898) internal successors, (21870), 18673 states have internal predecessors, (21870), 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) [2021-11-23 02:21:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18674 states to 18674 states and 21870 transitions. [2021-11-23 02:21:12,718 INFO L78 Accepts]: Start accepts. Automaton has 18674 states and 21870 transitions. Word has length 291 [2021-11-23 02:21:12,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:12,719 INFO L470 AbstractCegarLoop]: Abstraction has 18674 states and 21870 transitions. [2021-11-23 02:21:12,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 5.618421052631579) internal successors, (427), 77 states have internal predecessors, (427), 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) [2021-11-23 02:21:12,719 INFO L276 IsEmpty]: Start isEmpty. Operand 18674 states and 21870 transitions. [2021-11-23 02:21:12,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-23 02:21:12,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:12,744 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 46, 46, 46, 1, 1, 1] [2021-11-23 02:21:12,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:21:12,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:21:12,972 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 02:21:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1691588868, now seen corresponding path program 15 times [2021-11-23 02:21:12,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:12,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571245201] [2021-11-23 02:21:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:12,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9731 backedges. 0 proven. 9685 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:21:14,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:14,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571245201] [2021-11-23 02:21:14,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571245201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:21:14,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426993663] [2021-11-23 02:21:14,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:21:14,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:21:14,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:21:14,074 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:21:14,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b88f69-9989-47fa-ae4f-0315e63a4eed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 02:21:14,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:21:14,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:21:14,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-23 02:21:14,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:21:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9731 backedges. 0 proven. 9685 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:21:14,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:21:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9731 backedges. 0 proven. 9685 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:21:17,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426993663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:21:17,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1229871051] [2021-11-23 02:21:17,574 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:21:17,574 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:21:17,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:21:17,575 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:21:17,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:21:17,844 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:21:18,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '301378#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 2147483647 (+ |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~i~0#1|))' at error location [2021-11-23 02:21:18,433 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:21:18,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:21:18,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 104 [2021-11-23 02:21:18,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947924902] [2021-11-23 02:21:18,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:21:18,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-23 02:21:18,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:18,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-23 02:21:18,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4721, Invalid=7935, Unknown=0, NotChecked=0, Total=12656 [2021-11-23 02:21:18,437 INFO L87 Difference]: Start difference. First operand 18674 states and 21870 transitions. Second operand has 105 states, 104 states have (on average 6.394230769230769) internal successors, (665), 105 states have internal predecessors, (665), 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) [2021-11-23 02:23:08,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:08,253 INFO L93 Difference]: Finished difference Result 214405 states and 256946 transitions. [2021-11-23 02:23:08,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 838 states. [2021-11-23 02:23:08,256 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 6.394230769230769) internal successors, (665), 105 states have internal predecessors, (665), 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 330 [2021-11-23 02:23:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:08,586 INFO L225 Difference]: With dead ends: 214405 [2021-11-23 02:23:08,586 INFO L226 Difference]: Without dead ends: 214404 [2021-11-23 02:23:08,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1778 GetRequests, 928 SyntacticMatches, 0 SemanticMatches, 850 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329861 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=165196, Invalid=559856, Unknown=0, NotChecked=0, Total=725052 [2021-11-23 02:23:08,669 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2505 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 1564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2505 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1564 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:08,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2505 Valid, 65 Invalid, 2793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1564 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 02:23:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214404 states.