./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/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_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7 --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 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:03:25,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:03:25,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:03:25,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:03:25,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:03:25,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:03:25,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:03:25,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:03:25,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:03:25,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:03:25,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:03:25,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:03:25,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:03:25,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:03:25,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:03:25,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:03:25,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:03:25,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:03:25,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:03:25,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:03:25,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:03:25,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:03:25,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:03:25,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:03:25,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:03:25,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:03:25,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:03:25,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:03:25,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:03:25,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:03:25,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:03:25,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:03:25,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:03:25,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:03:25,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:03:25,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:03:25,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:03:25,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:03:25,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:03:25,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:03:25,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:03:25,690 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-25 18:03:25,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:03:25,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:03:25,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:03:25,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:03:25,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:03:25,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:03:25,717 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:03:25,718 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:03:25,718 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:03:25,718 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:03:25,718 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:03:25,718 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:03:25,718 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:03:25,719 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:03:25,719 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:03:25,719 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:03:25,719 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:03:25,719 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:03:25,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:03:25,720 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:03:25,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:03:25,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:03:25,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:03:25,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:03:25,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:03:25,721 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-25 18:03:25,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:03:25,722 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:03:25,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:03:25,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:03:25,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:03:25,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:03:25,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:03:25,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:03:25,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:03:25,723 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:03:25,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:03:25,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:03:25,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:03:25,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:03:25,724 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_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 172ac4fa0310d14c59d9149bc1b8ec1548860e0b827250d611bfd9d710019753 [2021-11-25 18:03:25,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:03:26,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:03:26,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:03:26,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:03:26,009 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:03:26,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c [2021-11-25 18:03:26,092 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/data/eca29e0d0/524ed2288c9740f487eb5b51b0caf73b/FLAG9ce851788 [2021-11-25 18:03:26,518 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:03:26,519 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c [2021-11-25 18:03:26,529 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/data/eca29e0d0/524ed2288c9740f487eb5b51b0caf73b/FLAG9ce851788 [2021-11-25 18:03:26,900 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/data/eca29e0d0/524ed2288c9740f487eb5b51b0caf73b [2021-11-25 18:03:26,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:03:26,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:03:26,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:03:26,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:03:26,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:03:26,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:26" (1/1) ... [2021-11-25 18:03:26,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2759e557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:26, skipping insertion in model container [2021-11-25 18:03:26,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:26" (1/1) ... [2021-11-25 18:03:26,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:03:26,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:03:27,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:03:27,102 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:03:27,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:03:27,127 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:03:27,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27 WrapperNode [2021-11-25 18:03:27,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:03:27,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:03:27,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:03:27,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:03:27,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27" (1/1) ... [2021-11-25 18:03:27,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27" (1/1) ... [2021-11-25 18:03:27,159 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2021-11-25 18:03:27,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:03:27,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:03:27,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:03:27,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:03:27,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27" (1/1) ... [2021-11-25 18:03:27,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27" (1/1) ... [2021-11-25 18:03:27,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27" (1/1) ... [2021-11-25 18:03:27,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27" (1/1) ... [2021-11-25 18:03:27,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27" (1/1) ... [2021-11-25 18:03:27,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27" (1/1) ... [2021-11-25 18:03:27,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27" (1/1) ... [2021-11-25 18:03:27,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:03:27,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:03:27,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:03:27,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:03:27,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27" (1/1) ... [2021-11-25 18:03:27,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:03:27,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:27,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:03:27,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:03:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:03:27,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:03:27,341 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:03:27,344 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:03:27,459 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:03:27,494 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:03:27,494 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:03:27,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:03:27 BoogieIcfgContainer [2021-11-25 18:03:27,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:03:27,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:03:27,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:03:27,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:03:27,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:03:26" (1/3) ... [2021-11-25 18:03:27,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c8a087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:03:27, skipping insertion in model container [2021-11-25 18:03:27,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27" (2/3) ... [2021-11-25 18:03:27,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c8a087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:03:27, skipping insertion in model container [2021-11-25 18:03:27,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:03:27" (3/3) ... [2021-11-25 18:03:27,516 INFO L111 eAbstractionObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Fig9a.c [2021-11-25 18:03:27,530 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:03:27,530 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-25 18:03:27,576 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:03:27,583 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 [2021-11-25 18:03:27,583 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-25 18:03:27,627 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) [2021-11-25 18:03:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:03:27,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:27,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:03:27,634 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)] === [2021-11-25 18:03:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:27,640 INFO L85 PathProgramCache]: Analyzing trace with hash 71275045, now seen corresponding path program 1 times [2021-11-25 18:03:27,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:27,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123165492] [2021-11-25 18:03:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:27,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:27,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:27,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123165492] [2021-11-25 18:03:27,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123165492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:27,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:27,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:03:27,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566245896] [2021-11-25 18:03:27,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:27,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:03:27,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:27,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:03:27,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:03:27,873 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) [2021-11-25 18:03:27,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:27,970 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-25 18:03:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:03:27,973 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 [2021-11-25 18:03:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:27,981 INFO L225 Difference]: With dead ends: 28 [2021-11-25 18:03:27,981 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 18:03:27,986 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 [2021-11-25 18:03:27,996 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:27,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 4 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:03:28,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 18:03:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-25 18:03:28,036 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) [2021-11-25 18:03:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-25 18:03:28,038 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2021-11-25 18:03:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:28,039 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-25 18:03:28,039 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) [2021-11-25 18:03:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-25 18:03:28,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:03:28,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:28,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:03:28,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:03:28,041 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)] === [2021-11-25 18:03:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:28,045 INFO L85 PathProgramCache]: Analyzing trace with hash 71274263, now seen corresponding path program 1 times [2021-11-25 18:03:28,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:28,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829973081] [2021-11-25 18:03:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:28,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:28,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:28,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829973081] [2021-11-25 18:03:28,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829973081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:28,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:28,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:03:28,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223509161] [2021-11-25 18:03:28,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:28,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:03:28,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:28,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:03:28,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:03:28,122 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) [2021-11-25 18:03:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:28,159 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-25 18:03:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:03:28,159 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 [2021-11-25 18:03:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:28,160 INFO L225 Difference]: With dead ends: 14 [2021-11-25 18:03:28,160 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 18:03:28,161 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 [2021-11-25 18:03:28,167 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 [2021-11-25 18:03:28,168 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] [2021-11-25 18:03:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 18:03:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 18:03:28,176 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) [2021-11-25 18:03:28,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 18:03:28,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2021-11-25 18:03:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:28,178 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 18:03:28,178 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) [2021-11-25 18:03:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 18:03:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:03:28,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:28,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:03:28,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:03:28,184 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)] === [2021-11-25 18:03:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:28,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2085465086, now seen corresponding path program 1 times [2021-11-25 18:03:28,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:28,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249783129] [2021-11-25 18:03:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:28,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:28,253 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:28,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249783129] [2021-11-25 18:03:28,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249783129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:28,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:28,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:03:28,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374479507] [2021-11-25 18:03:28,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:28,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:03:28,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:28,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:03:28,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:03:28,256 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) [2021-11-25 18:03:28,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:28,287 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-25 18:03:28,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:03:28,288 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 [2021-11-25 18:03:28,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:28,289 INFO L225 Difference]: With dead ends: 14 [2021-11-25 18:03:28,289 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 18:03:28,289 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 [2021-11-25 18:03:28,297 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 [2021-11-25 18:03:28,298 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] [2021-11-25 18:03:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 18:03:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-25 18:03:28,306 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) [2021-11-25 18:03:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-25 18:03:28,306 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6 [2021-11-25 18:03:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:28,307 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-25 18:03:28,307 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) [2021-11-25 18:03:28,307 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-25 18:03:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:03:28,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:28,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:28,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:03:28,311 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)] === [2021-11-25 18:03:28,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:28,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1617782066, now seen corresponding path program 1 times [2021-11-25 18:03:28,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:28,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720753466] [2021-11-25 18:03:28,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:28,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:28,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:28,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720753466] [2021-11-25 18:03:28,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720753466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:28,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:28,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:03:28,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255193147] [2021-11-25 18:03:28,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:28,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:03:28,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:28,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:03:28,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:28,370 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) [2021-11-25 18:03:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:28,399 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-25 18:03:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:03:28,400 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 [2021-11-25 18:03:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:28,403 INFO L225 Difference]: With dead ends: 22 [2021-11-25 18:03:28,403 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 18:03:28,403 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 [2021-11-25 18:03:28,410 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 [2021-11-25 18:03:28,413 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] [2021-11-25 18:03:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 18:03:28,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-25 18:03:28,422 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) [2021-11-25 18:03:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-25 18:03:28,423 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2021-11-25 18:03:28,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:28,423 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-25 18:03:28,423 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) [2021-11-25 18:03:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-25 18:03:28,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:03:28,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:28,424 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:28,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:03:28,425 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)] === [2021-11-25 18:03:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:28,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1617781284, now seen corresponding path program 1 times [2021-11-25 18:03:28,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:28,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132746527] [2021-11-25 18:03:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:28,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:28,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132746527] [2021-11-25 18:03:28,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132746527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778543977] [2021-11-25 18:03:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:28,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:28,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:28,504 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:28,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:03:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:03:28,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:28,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:28,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778543977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:28,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336912971] [2021-11-25 18:03:28,721 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:03:28,721 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:28,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:28,731 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:28,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:28,848 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:29,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1336912971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:29,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:29,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5] total 12 [2021-11-25 18:03:29,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970927780] [2021-11-25 18:03:29,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:29,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:03:29,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:29,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:03:29,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:03:29,056 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) [2021-11-25 18:03:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:29,153 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-11-25 18:03:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:03:29,154 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 [2021-11-25 18:03:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:29,155 INFO L225 Difference]: With dead ends: 25 [2021-11-25 18:03:29,155 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 18:03:29,156 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 [2021-11-25 18:03:29,157 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 [2021-11-25 18:03:29,157 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] [2021-11-25 18:03:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 18:03:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2021-11-25 18:03:29,161 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) [2021-11-25 18:03:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-25 18:03:29,162 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2021-11-25 18:03:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:29,163 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-25 18:03:29,163 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) [2021-11-25 18:03:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-25 18:03:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:03:29,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:29,164 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 18:03:29,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:29,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:29,381 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)] === [2021-11-25 18:03:29,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:29,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1665828841, now seen corresponding path program 1 times [2021-11-25 18:03:29,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:29,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161567326] [2021-11-25 18:03:29,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:29,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:03:29,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:29,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161567326] [2021-11-25 18:03:29,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161567326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:29,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411365369] [2021-11-25 18:03:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:29,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:29,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:29,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:29,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:03:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:29,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:03:29,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:03:29,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:03:29,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411365369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:29,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1185527715] [2021-11-25 18:03:29,564 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:03:29,564 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:29,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:29,565 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:29,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:30,235 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:30,424 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 [2021-11-25 18:03:30,424 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:30,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:30,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-25 18:03:30,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891673572] [2021-11-25 18:03:30,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:30,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:03:30,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:03:30,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:03:30,427 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) [2021-11-25 18:03:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:30,474 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-25 18:03:30,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:03:30,474 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 [2021-11-25 18:03:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:30,475 INFO L225 Difference]: With dead ends: 46 [2021-11-25 18:03:30,475 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 18:03:30,476 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 [2021-11-25 18:03:30,477 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 [2021-11-25 18:03:30,477 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] [2021-11-25 18:03:30,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 18:03:30,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-11-25 18:03:30,485 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) [2021-11-25 18:03:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-11-25 18:03:30,486 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 15 [2021-11-25 18:03:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:30,486 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-11-25 18:03:30,486 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) [2021-11-25 18:03:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-11-25 18:03:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:03:30,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:30,487 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:30,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:30,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:30,703 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)] === [2021-11-25 18:03:30,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:30,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1665828059, now seen corresponding path program 1 times [2021-11-25 18:03:30,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:30,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587437468] [2021-11-25 18:03:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:30,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:30,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:30,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587437468] [2021-11-25 18:03:30,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587437468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:30,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136782722] [2021-11-25 18:03:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:30,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:30,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:30,768 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:30,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:03:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:30,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:03:30,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:30,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:30,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136782722] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:30,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1634871808] [2021-11-25 18:03:30,973 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:03:30,973 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:30,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:30,974 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:30,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:31,454 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:31,701 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 [2021-11-25 18:03:31,701 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:31,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:31,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-11-25 18:03:31,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342621158] [2021-11-25 18:03:31,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:31,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:03:31,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:03:31,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:03:31,703 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) [2021-11-25 18:03:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:32,327 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2021-11-25 18:03:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-25 18:03:32,328 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 [2021-11-25 18:03:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:32,331 INFO L225 Difference]: With dead ends: 78 [2021-11-25 18:03:32,331 INFO L226 Difference]: Without dead ends: 77 [2021-11-25 18:03:32,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=468, Invalid=1884, Unknown=0, NotChecked=0, Total=2352 [2021-11-25 18:03:32,335 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 [2021-11-25 18:03:32,335 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] [2021-11-25 18:03:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-25 18:03:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-11-25 18:03:32,344 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) [2021-11-25 18:03:32,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-11-25 18:03:32,345 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 15 [2021-11-25 18:03:32,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:32,345 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-11-25 18:03:32,346 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) [2021-11-25 18:03:32,346 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-11-25 18:03:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 18:03:32,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:32,347 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:32,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:32,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:32,574 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)] === [2021-11-25 18:03:32,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:32,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1617614149, now seen corresponding path program 2 times [2021-11-25 18:03:32,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:32,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866104361] [2021-11-25 18:03:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:32,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:03:32,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:32,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866104361] [2021-11-25 18:03:32,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866104361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:32,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773856783] [2021-11-25 18:03:32,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:03:32,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:32,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:32,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:32,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:03:32,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 18:03:32,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:03:32,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:32,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:32,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773856783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:32,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503556801] [2021-11-25 18:03:32,964 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:03:32,964 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:32,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:32,965 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:32,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:33,392 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:33,609 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 [2021-11-25 18:03:33,610 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:33,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:33,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2021-11-25 18:03:33,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073577618] [2021-11-25 18:03:33,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:33,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 18:03:33,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:33,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 18:03:33,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:03:33,612 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) [2021-11-25 18:03:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:33,937 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2021-11-25 18:03:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:03:33,937 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 [2021-11-25 18:03:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:33,938 INFO L225 Difference]: With dead ends: 105 [2021-11-25 18:03:33,938 INFO L226 Difference]: Without dead ends: 55 [2021-11-25 18:03:33,939 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 [2021-11-25 18:03:33,940 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 [2021-11-25 18:03:33,940 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] [2021-11-25 18:03:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-25 18:03:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-11-25 18:03:33,948 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) [2021-11-25 18:03:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-11-25 18:03:33,949 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 21 [2021-11-25 18:03:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:33,949 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-11-25 18:03:33,950 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) [2021-11-25 18:03:33,950 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-11-25 18:03:33,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:03:33,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:33,951 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1] [2021-11-25 18:03:33,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:34,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:34,178 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)] === [2021-11-25 18:03:34,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:34,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1051840471, now seen corresponding path program 3 times [2021-11-25 18:03:34,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:34,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269210252] [2021-11-25 18:03:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:34,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:34,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:34,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269210252] [2021-11-25 18:03:34,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269210252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:34,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707501490] [2021-11-25 18:03:34,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:03:34,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:34,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:34,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:34,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:03:34,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:03:34,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:34,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:03:34,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:34,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:34,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707501490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:34,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763518522] [2021-11-25 18:03:34,766 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:03:34,766 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:34,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:34,767 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:34,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:35,192 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:35,456 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 [2021-11-25 18:03:35,456 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:35,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:35,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2021-11-25 18:03:35,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906854217] [2021-11-25 18:03:35,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:35,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 18:03:35,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 18:03:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:03:35,458 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) [2021-11-25 18:03:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:36,112 INFO L93 Difference]: Finished difference Result 152 states and 176 transitions. [2021-11-25 18:03:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:03:36,113 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 [2021-11-25 18:03:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:36,114 INFO L225 Difference]: With dead ends: 152 [2021-11-25 18:03:36,114 INFO L226 Difference]: Without dead ends: 127 [2021-11-25 18:03:36,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=471, Invalid=2079, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 18:03:36,117 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 [2021-11-25 18:03:36,117 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] [2021-11-25 18:03:36,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-25 18:03:36,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2021-11-25 18:03:36,131 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) [2021-11-25 18:03:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-11-25 18:03:36,132 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 25 [2021-11-25 18:03:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:36,133 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-11-25 18:03:36,133 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) [2021-11-25 18:03:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-11-25 18:03:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:03:36,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:36,135 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1] [2021-11-25 18:03:36,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:36,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:36,350 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)] === [2021-11-25 18:03:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:36,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1378554212, now seen corresponding path program 4 times [2021-11-25 18:03:36,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:36,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257647785] [2021-11-25 18:03:36,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:36,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:36,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:36,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257647785] [2021-11-25 18:03:36,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257647785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:36,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063343336] [2021-11-25 18:03:36,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:03:36,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:36,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:36,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:36,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:03:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:36,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:03:36,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:36,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:36,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063343336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:36,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1018333366] [2021-11-25 18:03:36,778 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:03:36,779 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:36,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:36,779 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:36,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:37,123 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:37,367 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 [2021-11-25 18:03:37,367 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:37,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:37,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-11-25 18:03:37,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024456987] [2021-11-25 18:03:37,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:37,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:03:37,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:37,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:03:37,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-11-25 18:03:37,369 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) [2021-11-25 18:03:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:39,346 INFO L93 Difference]: Finished difference Result 289 states and 365 transitions. [2021-11-25 18:03:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-25 18:03:39,347 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 [2021-11-25 18:03:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:39,350 INFO L225 Difference]: With dead ends: 289 [2021-11-25 18:03:39,350 INFO L226 Difference]: Without dead ends: 287 [2021-11-25 18:03:39,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3808 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1969, Invalid=9161, Unknown=0, NotChecked=0, Total=11130 [2021-11-25 18:03:39,356 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 [2021-11-25 18:03:39,357 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] [2021-11-25 18:03:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-25 18:03:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 200. [2021-11-25 18:03:39,403 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) [2021-11-25 18:03:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 239 transitions. [2021-11-25 18:03:39,408 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 239 transitions. Word has length 28 [2021-11-25 18:03:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:39,410 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 239 transitions. [2021-11-25 18:03:39,410 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) [2021-11-25 18:03:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 239 transitions. [2021-11-25 18:03:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 18:03:39,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:39,412 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2021-11-25 18:03:39,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-25 18:03:39,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:03:39,615 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)] === [2021-11-25 18:03:39,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:39,615 INFO L85 PathProgramCache]: Analyzing trace with hash -378448526, now seen corresponding path program 2 times [2021-11-25 18:03:39,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:39,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123057103] [2021-11-25 18:03:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:39,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-25 18:03:39,668 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:39,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123057103] [2021-11-25 18:03:39,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123057103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:39,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348347365] [2021-11-25 18:03:39,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:03:39,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:39,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:39,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:39,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:03:39,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 18:03:39,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:39,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:03:39,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-25 18:03:39,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-25 18:03:39,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348347365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:39,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885182445] [2021-11-25 18:03:39,833 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:03:39,833 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:39,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:39,834 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:39,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:40,178 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:40,323 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 [2021-11-25 18:03:40,323 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:40,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:40,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2021-11-25 18:03:40,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330267903] [2021-11-25 18:03:40,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:40,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:03:40,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:40,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:03:40,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:03:40,324 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) [2021-11-25 18:03:40,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:40,352 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2021-11-25 18:03:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:03:40,353 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 [2021-11-25 18:03:40,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:40,355 INFO L225 Difference]: With dead ends: 200 [2021-11-25 18:03:40,355 INFO L226 Difference]: Without dead ends: 199 [2021-11-25 18:03:40,355 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 [2021-11-25 18:03:40,356 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 [2021-11-25 18:03:40,357 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] [2021-11-25 18:03:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-25 18:03:40,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-11-25 18:03:40,375 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) [2021-11-25 18:03:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 210 transitions. [2021-11-25 18:03:40,376 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 210 transitions. Word has length 36 [2021-11-25 18:03:40,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:40,376 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 210 transitions. [2021-11-25 18:03:40,377 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) [2021-11-25 18:03:40,377 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 210 transitions. [2021-11-25 18:03:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 18:03:40,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:40,379 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2021-11-25 18:03:40,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:40,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 18:03:40,594 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)] === [2021-11-25 18:03:40,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash -378449308, now seen corresponding path program 5 times [2021-11-25 18:03:40,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:40,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730936285] [2021-11-25 18:03:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:40,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:03:40,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:40,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730936285] [2021-11-25 18:03:40,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730936285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:40,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761779255] [2021-11-25 18:03:40,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:03:40,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:40,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:40,682 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:40,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:03:40,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 18:03:40,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:40,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:03:40,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:03:40,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:03:41,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761779255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:41,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079480659] [2021-11-25 18:03:41,036 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:03:41,037 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:41,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:41,037 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:41,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:41,358 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:41,560 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 [2021-11-25 18:03:41,560 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:41,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:41,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-11-25 18:03:41,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833841153] [2021-11-25 18:03:41,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:41,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 18:03:41,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:41,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 18:03:41,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-11-25 18:03:41,562 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) [2021-11-25 18:03:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:43,112 INFO L93 Difference]: Finished difference Result 1038 states and 1235 transitions. [2021-11-25 18:03:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-25 18:03:43,113 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 [2021-11-25 18:03:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:43,119 INFO L225 Difference]: With dead ends: 1038 [2021-11-25 18:03:43,120 INFO L226 Difference]: Without dead ends: 1037 [2021-11-25 18:03:43,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3109 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1912, Invalid=7018, Unknown=0, NotChecked=0, Total=8930 [2021-11-25 18:03:43,124 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 [2021-11-25 18:03:43,124 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] [2021-11-25 18:03:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-11-25 18:03:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 325. [2021-11-25 18:03:43,159 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) [2021-11-25 18:03:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 378 transitions. [2021-11-25 18:03:43,161 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 378 transitions. Word has length 36 [2021-11-25 18:03:43,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:43,161 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 378 transitions. [2021-11-25 18:03:43,161 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) [2021-11-25 18:03:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 378 transitions. [2021-11-25 18:03:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 18:03:43,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:43,163 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 1, 1, 1] [2021-11-25 18:03:43,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:43,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:43,378 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)] === [2021-11-25 18:03:43,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:43,379 INFO L85 PathProgramCache]: Analyzing trace with hash 843837804, now seen corresponding path program 6 times [2021-11-25 18:03:43,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:43,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666750029] [2021-11-25 18:03:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:43,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 47 proven. 140 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:03:43,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:43,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666750029] [2021-11-25 18:03:43,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666750029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:43,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891289564] [2021-11-25 18:03:43,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:03:43,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:43,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:43,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:43,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:03:43,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:03:43,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:43,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 18:03:43,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 156 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:03:43,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 10 proven. 173 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:03:44,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891289564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:44,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1934419149] [2021-11-25 18:03:44,231 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:03:44,231 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:44,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:44,231 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:44,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:44,505 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:45,039 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 [2021-11-25 18:03:45,039 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:45,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:45,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33 [2021-11-25 18:03:45,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440319904] [2021-11-25 18:03:45,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:45,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 18:03:45,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:45,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 18:03:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 18:03:45,041 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) [2021-11-25 18:03:47,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:47,760 INFO L93 Difference]: Finished difference Result 843 states and 989 transitions. [2021-11-25 18:03:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-25 18:03:47,760 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 [2021-11-25 18:03:47,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:47,764 INFO L225 Difference]: With dead ends: 843 [2021-11-25 18:03:47,764 INFO L226 Difference]: Without dead ends: 650 [2021-11-25 18:03:47,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3495 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2145, Invalid=10065, Unknown=0, NotChecked=0, Total=12210 [2021-11-25 18:03:47,769 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 250 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2021-11-25 18:03:47,769 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] [2021-11-25 18:03:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-25 18:03:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 545. [2021-11-25 18:03:47,833 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) [2021-11-25 18:03:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 635 transitions. [2021-11-25 18:03:47,836 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 635 transitions. Word has length 48 [2021-11-25 18:03:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:47,837 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 635 transitions. [2021-11-25 18:03:47,837 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) [2021-11-25 18:03:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 635 transitions. [2021-11-25 18:03:47,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 18:03:47,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:47,839 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 5, 4, 4, 4, 1, 1, 1] [2021-11-25 18:03:47,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:48,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:48,066 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)] === [2021-11-25 18:03:48,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1389636412, now seen corresponding path program 7 times [2021-11-25 18:03:48,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:48,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205899951] [2021-11-25 18:03:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:48,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 231 proven. 136 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:03:48,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:48,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205899951] [2021-11-25 18:03:48,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205899951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:48,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621624041] [2021-11-25 18:03:48,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:03:48,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:48,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:48,194 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:48,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:03:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:03:48,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 249 proven. 118 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:03:48,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 236 proven. 131 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:03:48,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621624041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:48,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1410740667] [2021-11-25 18:03:48,744 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:03:48,744 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:48,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:48,745 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:48,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:49,002 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:49,424 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 [2021-11-25 18:03:49,424 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:49,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:49,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2021-11-25 18:03:49,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921324846] [2021-11-25 18:03:49,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:49,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:03:49,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:49,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:03:49,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:03:49,425 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) [2021-11-25 18:03:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:49,806 INFO L93 Difference]: Finished difference Result 588 states and 687 transitions. [2021-11-25 18:03:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 18:03:49,806 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 [2021-11-25 18:03:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:49,812 INFO L225 Difference]: With dead ends: 588 [2021-11-25 18:03:49,812 INFO L226 Difference]: Without dead ends: 469 [2021-11-25 18:03:49,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1791, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 18:03:49,814 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 [2021-11-25 18:03:49,814 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] [2021-11-25 18:03:49,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-25 18:03:49,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 466. [2021-11-25 18:03:49,858 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) [2021-11-25 18:03:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 537 transitions. [2021-11-25 18:03:49,859 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 537 transitions. Word has length 66 [2021-11-25 18:03:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:49,860 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 537 transitions. [2021-11-25 18:03:49,860 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) [2021-11-25 18:03:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 537 transitions. [2021-11-25 18:03:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 18:03:49,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:49,861 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 7, 7, 7, 1, 1, 1] [2021-11-25 18:03:49,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:50,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:03:50,066 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)] === [2021-11-25 18:03:50,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:50,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1280857771, now seen corresponding path program 8 times [2021-11-25 18:03:50,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:50,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348555581] [2021-11-25 18:03:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:50,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 390 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:03:50,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:50,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348555581] [2021-11-25 18:03:50,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348555581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:50,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532027437] [2021-11-25 18:03:50,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:03:50,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:50,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:50,206 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:50,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:03:50,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-25 18:03:50,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:03:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 181 proven. 175 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-25 18:03:50,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 181 proven. 175 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-25 18:03:50,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532027437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:50,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883173314] [2021-11-25 18:03:50,963 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:03:50,964 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:50,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:50,966 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:50,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:51,233 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:51,723 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 [2021-11-25 18:03:51,723 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:51,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:51,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 36 [2021-11-25 18:03:51,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421547701] [2021-11-25 18:03:51,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:51,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 18:03:51,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:51,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 18:03:51,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 18:03:51,725 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) [2021-11-25 18:04:06,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:06,399 INFO L93 Difference]: Finished difference Result 1449 states and 1739 transitions. [2021-11-25 18:04:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2021-11-25 18:04:06,399 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 [2021-11-25 18:04:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:06,407 INFO L225 Difference]: With dead ends: 1449 [2021-11-25 18:04:06,407 INFO L226 Difference]: Without dead ends: 1448 [2021-11-25 18:04:06,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52015 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=19982, Invalid=93924, Unknown=0, NotChecked=0, Total=113906 [2021-11-25 18:04:06,423 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 [2021-11-25 18:04:06,424 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] [2021-11-25 18:04:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-11-25 18:04:06,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 763. [2021-11-25 18:04:06,506 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) [2021-11-25 18:04:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 899 transitions. [2021-11-25 18:04:06,509 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 899 transitions. Word has length 69 [2021-11-25 18:04:06,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:06,509 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 899 transitions. [2021-11-25 18:04:06,510 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) [2021-11-25 18:04:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 899 transitions. [2021-11-25 18:04:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 18:04:06,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:06,511 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 1, 1, 1] [2021-11-25 18:04:06,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:06,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:04:06,738 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)] === [2021-11-25 18:04:06,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:06,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2003326660, now seen corresponding path program 9 times [2021-11-25 18:04:06,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:06,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932754001] [2021-11-25 18:04:06,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:06,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:04:06,925 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:06,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932754001] [2021-11-25 18:04:06,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932754001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:06,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554828050] [2021-11-25 18:04:06,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:04:06,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:06,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:06,951 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:06,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:04:06,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:04:06,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:04:06,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:04:06,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:04:07,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:04:07,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554828050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:07,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1643211033] [2021-11-25 18:04:07,470 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:04:07,471 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:04:07,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:04:07,471 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:04:07,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:04:07,717 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:04:08,103 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 [2021-11-25 18:04:08,103 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:04:08,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:04:08,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-11-25 18:04:08,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453195294] [2021-11-25 18:04:08,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:04:08,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 18:04:08,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:08,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 18:04:08,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 18:04:08,105 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) [2021-11-25 18:04:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:12,415 INFO L93 Difference]: Finished difference Result 6637 states and 7942 transitions. [2021-11-25 18:04:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-25 18:04:12,415 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 [2021-11-25 18:04:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:12,445 INFO L225 Difference]: With dead ends: 6637 [2021-11-25 18:04:12,445 INFO L226 Difference]: Without dead ends: 6636 [2021-11-25 18:04:12,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17255 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9154, Invalid=32258, Unknown=0, NotChecked=0, Total=41412 [2021-11-25 18:04:12,451 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 603 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:12,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 22 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:04:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6636 states. [2021-11-25 18:04:12,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6636 to 2719. [2021-11-25 18:04:12,760 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) [2021-11-25 18:04:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 3182 transitions. [2021-11-25 18:04:12,768 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 3182 transitions. Word has length 78 [2021-11-25 18:04:12,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:12,769 INFO L470 AbstractCegarLoop]: Abstraction has 2719 states and 3182 transitions. [2021-11-25 18:04:12,769 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) [2021-11-25 18:04:12,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 3182 transitions. [2021-11-25 18:04:12,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-25 18:04:12,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:12,775 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 17, 16, 16, 16, 1, 1, 1] [2021-11-25 18:04:12,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:12,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:12,998 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)] === [2021-11-25 18:04:12,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash -958690084, now seen corresponding path program 10 times [2021-11-25 18:04:12,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:12,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565023228] [2021-11-25 18:04:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:12,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2051 backedges. 0 proven. 1364 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2021-11-25 18:04:13,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:13,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565023228] [2021-11-25 18:04:13,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565023228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:13,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923705339] [2021-11-25 18:04:13,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:04:13,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:13,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:13,250 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:13,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:04:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:13,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 18:04:13,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2051 backedges. 911 proven. 1069 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-25 18:04:13,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2051 backedges. 900 proven. 1080 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-25 18:04:14,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923705339] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:14,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1902843237] [2021-11-25 18:04:14,468 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:04:14,468 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:04:14,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:04:14,469 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:04:14,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:04:14,806 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:04:15,078 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 [2021-11-25 18:04:15,078 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:04:15,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:04:15,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 23] total 42 [2021-11-25 18:04:15,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527878953] [2021-11-25 18:04:15,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:04:15,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-25 18:04:15,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:15,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-25 18:04:15,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2057, Unknown=0, NotChecked=0, Total=2352 [2021-11-25 18:04:15,081 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) [2021-11-25 18:04:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:25,038 INFO L93 Difference]: Finished difference Result 5393 states and 6338 transitions. [2021-11-25 18:04:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 318 states. [2021-11-25 18:04:25,039 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 [2021-11-25 18:04:25,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:25,051 INFO L225 Difference]: With dead ends: 5393 [2021-11-25 18:04:25,051 INFO L226 Difference]: Without dead ends: 3358 [2021-11-25 18:04:25,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 415 SyntacticMatches, 1 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50585 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=13919, Invalid=111043, Unknown=0, NotChecked=0, Total=124962 [2021-11-25 18:04:25,061 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 420 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2021-11-25 18:04:25,062 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] [2021-11-25 18:04:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-11-25 18:04:25,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 3036. [2021-11-25 18:04:25,446 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) [2021-11-25 18:04:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 3490 transitions. [2021-11-25 18:04:25,454 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 3490 transitions. Word has length 150 [2021-11-25 18:04:25,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:25,454 INFO L470 AbstractCegarLoop]: Abstraction has 3036 states and 3490 transitions. [2021-11-25 18:04:25,455 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) [2021-11-25 18:04:25,455 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 3490 transitions. [2021-11-25 18:04:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-25 18:04:25,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:25,461 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 18, 17, 17, 17, 1, 1, 1] [2021-11-25 18:04:25,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:25,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:04:25,674 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)] === [2021-11-25 18:04:25,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:25,675 INFO L85 PathProgramCache]: Analyzing trace with hash 22000467, now seen corresponding path program 11 times [2021-11-25 18:04:25,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:25,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237336862] [2021-11-25 18:04:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:25,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1556 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-25 18:04:25,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:25,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237336862] [2021-11-25 18:04:25,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237336862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:25,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367000522] [2021-11-25 18:04:25,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:04:25,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:25,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:25,864 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:25,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:04:25,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-11-25 18:04:25,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:04:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:04:25,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 969 proven. 1027 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-25 18:04:26,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 969 proven. 1027 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-25 18:04:27,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367000522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:27,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [617435632] [2021-11-25 18:04:27,369 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:04:27,369 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:04:27,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:04:27,370 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:04:27,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:04:27,726 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:04:28,072 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 [2021-11-25 18:04:28,073 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:04:28,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:04:28,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 50 [2021-11-25 18:04:28,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169238167] [2021-11-25 18:04:28,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:04:28,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-25 18:04:28,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:28,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-25 18:04:28,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=2759, Unknown=0, NotChecked=0, Total=3306 [2021-11-25 18:04:28,075 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) [2021-11-25 18:05:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:07,719 INFO L93 Difference]: Finished difference Result 8111 states and 9603 transitions. [2021-11-25 18:05:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 581 states. [2021-11-25 18:05:07,719 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 [2021-11-25 18:05:07,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:07,750 INFO L225 Difference]: With dead ends: 8111 [2021-11-25 18:05:07,750 INFO L226 Difference]: Without dead ends: 8110 [2021-11-25 18:05:07,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 630 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196790 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=73674, Invalid=325118, Unknown=0, NotChecked=0, Total=398792 [2021-11-25 18:05:07,767 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 3889 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 2615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:07,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3889 Valid, 1 Invalid, 3795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2615 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-25 18:05:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8110 states. [2021-11-25 18:05:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8110 to 3187. [2021-11-25 18:05:08,377 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) [2021-11-25 18:05:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3187 states to 3187 states and 3681 transitions. [2021-11-25 18:05:08,386 INFO L78 Accepts]: Start accepts. Automaton has 3187 states and 3681 transitions. Word has length 157 [2021-11-25 18:05:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:08,386 INFO L470 AbstractCegarLoop]: Abstraction has 3187 states and 3681 transitions. [2021-11-25 18:05:08,387 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) [2021-11-25 18:05:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3187 states and 3681 transitions. [2021-11-25 18:05:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-25 18:05:08,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:08,392 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 22, 1, 1, 1] [2021-11-25 18:05:08,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:08,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:05:08,606 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)] === [2021-11-25 18:05:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:08,607 INFO L85 PathProgramCache]: Analyzing trace with hash -38144124, now seen corresponding path program 12 times [2021-11-25 18:05:08,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:08,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427062289] [2021-11-25 18:05:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:08,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 0 proven. 2257 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:05:08,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:08,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427062289] [2021-11-25 18:05:08,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427062289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:08,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025096881] [2021-11-25 18:05:08,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:05:08,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:08,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:08,990 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:09,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:05:09,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:05:09,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:09,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 18:05:09,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 0 proven. 2257 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:05:09,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 0 proven. 2257 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:05:10,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025096881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:10,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1022603390] [2021-11-25 18:05:10,345 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:05:10,345 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:05:10,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:05:10,346 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:05:10,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:05:10,658 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:05:10,917 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 [2021-11-25 18:05:10,917 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:05:10,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:05:10,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 56 [2021-11-25 18:05:10,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518828549] [2021-11-25 18:05:10,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:10,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-25 18:05:10,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:10,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-25 18:05:10,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=2800, Unknown=0, NotChecked=0, Total=4032 [2021-11-25 18:05:10,919 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) [2021-11-25 18:05:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:29,099 INFO L93 Difference]: Finished difference Result 40994 states and 48938 transitions. [2021-11-25 18:05:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 406 states. [2021-11-25 18:05:29,100 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 [2021-11-25 18:05:29,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:29,215 INFO L225 Difference]: With dead ends: 40994 [2021-11-25 18:05:29,215 INFO L226 Difference]: Without dead ends: 40993 [2021-11-25 18:05:29,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76679 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=39703, Invalid=135439, Unknown=0, NotChecked=0, Total=175142 [2021-11-25 18:05:29,234 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1149 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:29,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 39 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:05:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40993 states. [2021-11-25 18:05:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40993 to 14980. [2021-11-25 18:05:30,791 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) [2021-11-25 18:05:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14980 states to 14980 states and 17583 transitions. [2021-11-25 18:05:30,812 INFO L78 Accepts]: Start accepts. Automaton has 14980 states and 17583 transitions. Word has length 162 [2021-11-25 18:05:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:30,812 INFO L470 AbstractCegarLoop]: Abstraction has 14980 states and 17583 transitions. [2021-11-25 18:05:30,812 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) [2021-11-25 18:05:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 14980 states and 17583 transitions. [2021-11-25 18:05:30,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-25 18:05:30,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:30,838 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 31, 30, 30, 30, 1, 1, 1] [2021-11-25 18:05:30,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:31,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:31,066 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)] === [2021-11-25 18:05:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash -57870388, now seen corresponding path program 13 times [2021-11-25 18:05:31,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:31,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682113974] [2021-11-25 18:05:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:31,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7630 backedges. 0 proven. 3521 refuted. 0 times theorem prover too weak. 4109 trivial. 0 not checked. [2021-11-25 18:05:31,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:31,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682113974] [2021-11-25 18:05:31,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682113974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:31,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780370481] [2021-11-25 18:05:31,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:05:31,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:31,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:31,371 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:31,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:05:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:31,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 18:05:31,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7630 backedges. 4489 proven. 1688 refuted. 0 times theorem prover too weak. 1453 trivial. 0 not checked. [2021-11-25 18:05:32,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7630 backedges. 4474 proven. 1703 refuted. 0 times theorem prover too weak. 1453 trivial. 0 not checked. [2021-11-25 18:05:33,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780370481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:33,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203729327] [2021-11-25 18:05:33,435 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:05:33,435 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:05:33,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:05:33,436 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:05:33,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:05:33,709 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:05:34,295 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 [2021-11-25 18:05:34,295 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:05:34,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:05:34,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27, 27] total 48 [2021-11-25 18:05:34,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071004358] [2021-11-25 18:05:34,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:34,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:05:34,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:34,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:05:34,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=2677, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 18:05:34,297 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) [2021-11-25 18:05:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:52,994 INFO L93 Difference]: Finished difference Result 28870 states and 34023 transitions. [2021-11-25 18:05:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 513 states. [2021-11-25 18:05:52,995 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 [2021-11-25 18:05:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:53,034 INFO L225 Difference]: With dead ends: 28870 [2021-11-25 18:05:53,035 INFO L226 Difference]: Without dead ends: 15715 [2021-11-25 18:05:53,075 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 [2021-11-25 18:05:53,076 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 [2021-11-25 18:05:53,077 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] [2021-11-25 18:05:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15715 states. [2021-11-25 18:05:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15715 to 15006. [2021-11-25 18:05:54,658 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) [2021-11-25 18:05:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15006 states to 15006 states and 17552 transitions. [2021-11-25 18:05:54,678 INFO L78 Accepts]: Start accepts. Automaton has 15006 states and 17552 transitions. Word has length 284 [2021-11-25 18:05:54,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:54,679 INFO L470 AbstractCegarLoop]: Abstraction has 15006 states and 17552 transitions. [2021-11-25 18:05:54,679 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) [2021-11-25 18:05:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 15006 states and 17552 transitions. [2021-11-25 18:05:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-25 18:05:54,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:54,705 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 54, 32, 31, 31, 31, 1, 1, 1] [2021-11-25 18:05:54,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:54,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:54,934 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)] === [2021-11-25 18:05:54,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:54,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2110241027, now seen corresponding path program 14 times [2021-11-25 18:05:54,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:54,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405853047] [2021-11-25 18:05:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:54,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 0 proven. 3887 refuted. 0 times theorem prover too weak. 4110 trivial. 0 not checked. [2021-11-25 18:05:55,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:55,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405853047] [2021-11-25 18:05:55,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405853047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:55,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512147926] [2021-11-25 18:05:55,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:05:55,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:55,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:55,249 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:55,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:05:55,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2021-11-25 18:05:55,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 18:05:55,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 2659 proven. 4891 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-25 18:05:56,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 2659 proven. 4891 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-25 18:05:59,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512147926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:59,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119944472] [2021-11-25 18:05:59,101 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:05:59,101 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:05:59,102 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:05:59,102 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:05:59,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:05:59,344 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:05:59,933 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 [2021-11-25 18:05:59,933 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:05:59,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:05:59,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30, 30] total 76 [2021-11-25 18:05:59,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526125748] [2021-11-25 18:05:59,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:59,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-25 18:05:59,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:59,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-25 18:05:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1625, Invalid=5515, Unknown=0, NotChecked=0, Total=7140 [2021-11-25 18:05:59,947 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) [2021-11-25 18:08:30,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:30,636 INFO L93 Difference]: Finished difference Result 49419 states and 59062 transitions. [2021-11-25 18:08:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1186 states. [2021-11-25 18:08:30,637 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 [2021-11-25 18:08:30,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:30,703 INFO L225 Difference]: With dead ends: 49419 [2021-11-25 18:08:30,703 INFO L226 Difference]: Without dead ends: 49418 [2021-11-25 18:08:30,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2092 GetRequests, 830 SyntacticMatches, 0 SemanticMatches, 1262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843229 ImplicationChecksByTransitivity, 140.3s TimeCoverageRelationStatistics Valid=308078, Invalid=1288354, Unknown=0, NotChecked=0, Total=1596432 [2021-11-25 18:08:30,792 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 7283 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 5473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s 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, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:30,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7283 Valid, 1 Invalid, 7453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5473 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 18:08:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49418 states. [2021-11-25 18:08:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49418 to 18674. [2021-11-25 18:08:34,052 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) [2021-11-25 18:08:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18674 states to 18674 states and 21870 transitions. [2021-11-25 18:08:34,085 INFO L78 Accepts]: Start accepts. Automaton has 18674 states and 21870 transitions. Word has length 291 [2021-11-25 18:08:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:34,086 INFO L470 AbstractCegarLoop]: Abstraction has 18674 states and 21870 transitions. [2021-11-25 18:08:34,086 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) [2021-11-25 18:08:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand 18674 states and 21870 transitions. [2021-11-25 18:08:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-25 18:08:34,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:34,111 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 46, 46, 46, 1, 1, 1] [2021-11-25 18:08:34,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:34,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 18:08:34,335 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)] === [2021-11-25 18:08:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:34,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1691588868, now seen corresponding path program 15 times [2021-11-25 18:08:34,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:34,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111164075] [2021-11-25 18:08:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:34,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9731 backedges. 0 proven. 9685 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 18:08:35,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:35,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111164075] [2021-11-25 18:08:35,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111164075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:08:35,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910030829] [2021-11-25 18:08:35,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:08:35,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:35,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:35,561 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:35,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8089b122-ef4c-4802-88a8-cf0a323aeeda/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 18:08:35,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:08:35,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:08:35,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-25 18:08:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9731 backedges. 0 proven. 9685 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 18:08:36,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9731 backedges. 0 proven. 9685 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 18:08:39,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910030829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:39,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1627306776] [2021-11-25 18:08:39,304 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:08:39,304 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:39,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:39,305 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:39,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:39,544 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:40,253 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 [2021-11-25 18:08:40,253 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:40,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:08:40,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 104 [2021-11-25 18:08:40,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18365223] [2021-11-25 18:08:40,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:40,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-25 18:08:40,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:40,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-25 18:08:40,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4721, Invalid=7935, Unknown=0, NotChecked=0, Total=12656 [2021-11-25 18:08:40,258 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)