./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aa1583b531c18e8d25726690525e5ca2db800c1fca35b7cfde3a7fa11382718a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:03:53,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:03:53,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:03:53,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:03:53,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:03:53,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:03:53,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:03:53,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:03:53,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:03:53,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:03:53,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:03:53,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:03:53,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:03:53,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:03:53,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:03:53,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:03:53,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:03:53,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:03:53,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:03:53,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:03:53,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:03:53,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:03:53,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:03:53,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:03:53,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:03:53,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:03:53,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:03:53,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:03:53,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:03:53,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:03:53,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:03:53,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:03:53,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:03:53,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:03:53,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:03:53,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:03:53,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:03:53,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:03:53,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:03:53,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:03:53,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:03:53,682 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-19 07:03:53,724 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:03:53,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:03:53,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:03:53,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:03:53,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:03:53,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:03:53,728 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:03:53,728 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:03:53,728 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:03:53,728 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:03:53,729 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:03:53,730 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:03:53,730 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:03:53,730 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:03:53,730 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:03:53,730 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:03:53,730 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:03:53,731 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:03:53,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:03:53,731 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:03:53,732 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:03:53,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:03:53,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:03:53,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:03:53,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:03:53,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:03:53,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:03:53,734 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-19 07:03:53,734 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:03:53,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:03:53,735 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:03:53,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:03:53,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:03:53,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:03:53,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:03:53,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:03:53,736 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:03:53,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:03:53,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:03:53,737 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:03:53,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:03:53,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:03:53,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:03:53,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa1583b531c18e8d25726690525e5ca2db800c1fca35b7cfde3a7fa11382718a [2022-11-19 07:03:54,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:03:54,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:03:54,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:03:54,072 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:03:54,073 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:03:54,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i [2022-11-19 07:03:54,152 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/data/fd62c53eb/91d716905baa4b8ab6bffc9e56238b82/FLAGb6bf1a226 [2022-11-19 07:03:54,612 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:03:54,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i [2022-11-19 07:03:54,618 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/data/fd62c53eb/91d716905baa4b8ab6bffc9e56238b82/FLAGb6bf1a226 [2022-11-19 07:03:55,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/data/fd62c53eb/91d716905baa4b8ab6bffc9e56238b82 [2022-11-19 07:03:55,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:03:55,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:03:55,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:03:55,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:03:55,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:03:55,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f07f288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55, skipping insertion in model container [2022-11-19 07:03:55,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:03:55,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:03:55,280 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i[873,886] [2022-11-19 07:03:55,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:03:55,298 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:03:55,311 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i[873,886] [2022-11-19 07:03:55,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:03:55,333 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:03:55,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55 WrapperNode [2022-11-19 07:03:55,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:03:55,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:03:55,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:03:55,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:03:55,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,367 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2022-11-19 07:03:55,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:03:55,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:03:55,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:03:55,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:03:55,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,401 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:03:55,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:03:55,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:03:55,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:03:55,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55" (1/1) ... [2022-11-19 07:03:55,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:03:55,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:55,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:03:55,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:03:55,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:03:55,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:03:55,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:03:55,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:03:55,562 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:03:55,564 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:03:55,675 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:03:55,704 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:03:55,705 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:03:55,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:03:55 BoogieIcfgContainer [2022-11-19 07:03:55,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:03:55,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:03:55,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:03:55,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:03:55,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:03:55" (1/3) ... [2022-11-19 07:03:55,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c89663f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:03:55, skipping insertion in model container [2022-11-19 07:03:55,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:55" (2/3) ... [2022-11-19 07:03:55,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c89663f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:03:55, skipping insertion in model container [2022-11-19 07:03:55,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:03:55" (3/3) ... [2022-11-19 07:03:55,720 INFO L112 eAbstractionObserver]: Analyzing ICFG benchmark36_conjunctive.i [2022-11-19 07:03:55,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:03:55,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-19 07:03:55,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:03:55,790 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c9ad75c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:03:55,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-19 07:03:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.75) 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) [2022-11-19 07:03:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:03:55,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:55,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:03:55,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:03:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2092610, now seen corresponding path program 1 times [2022-11-19 07:03:55,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:55,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804811111] [2022-11-19 07:03:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:55,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:56,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:56,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804811111] [2022-11-19 07:03:56,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804811111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:56,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:56,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:56,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384375884] [2022-11-19 07:03:56,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:56,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:03:56,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:56,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:03:56,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:03:56,085 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.75) 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) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:03:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:56,148 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-19 07:03:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:03:56,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 07:03:56,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:56,159 INFO L225 Difference]: With dead ends: 20 [2022-11-19 07:03:56,159 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 07:03:56,162 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:03:56,166 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:56,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:03:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 07:03:56,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2022-11-19 07:03:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 12 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) [2022-11-19 07:03:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-11-19 07:03:56,200 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2022-11-19 07:03:56,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:56,201 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-11-19 07:03:56,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:03:56,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-11-19 07:03:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:03:56,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:56,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:03:56,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:03:56,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:03:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:56,204 INFO L85 PathProgramCache]: Analyzing trace with hash 64870960, now seen corresponding path program 1 times [2022-11-19 07:03:56,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:56,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516798072] [2022-11-19 07:03:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:56,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:56,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:56,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516798072] [2022-11-19 07:03:56,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516798072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:56,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:56,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:03:56,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073584837] [2022-11-19 07:03:56,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:56,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:03:56,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:03:56,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:03:56,306 INFO L87 Difference]: Start difference. First operand 13 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) [2022-11-19 07:03:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:56,353 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2022-11-19 07:03:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:03:56,353 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 [2022-11-19 07:03:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:56,354 INFO L225 Difference]: With dead ends: 13 [2022-11-19 07:03:56,354 INFO L226 Difference]: Without dead ends: 12 [2022-11-19 07:03:56,355 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:03:56,357 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:56,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 8 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:03:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-19 07:03:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-19 07:03:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-11-19 07:03:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-19 07:03:56,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 5 [2022-11-19 07:03:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:56,376 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-19 07:03:56,376 INFO L496 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) [2022-11-19 07:03:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-19 07:03:56,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:03:56,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:56,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:03:56,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:03:56,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:03:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:56,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2010999812, now seen corresponding path program 1 times [2022-11-19 07:03:56,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:56,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058871530] [2022-11-19 07:03:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:56,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:56,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:56,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058871530] [2022-11-19 07:03:56,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058871530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:56,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:56,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:56,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851604138] [2022-11-19 07:03:56,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:56,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:03:56,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:56,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:03:56,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:03:56,497 INFO L87 Difference]: Start difference. First operand 12 states and 12 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) [2022-11-19 07:03:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:56,539 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-19 07:03:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:03:56,540 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 [2022-11-19 07:03:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:56,541 INFO L225 Difference]: With dead ends: 17 [2022-11-19 07:03:56,541 INFO L226 Difference]: Without dead ends: 16 [2022-11-19 07:03:56,541 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:03:56,543 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:56,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:03:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-19 07:03:56,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-11-19 07:03:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 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) [2022-11-19 07:03:56,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-11-19 07:03:56,549 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 6 [2022-11-19 07:03:56,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:56,549 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-11-19 07:03:56,550 INFO L496 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) [2022-11-19 07:03:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-11-19 07:03:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:03:56,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:56,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:56,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:03:56,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:03:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2083515214, now seen corresponding path program 1 times [2022-11-19 07:03:56,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:56,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467541159] [2022-11-19 07:03:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:56,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:56,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:56,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467541159] [2022-11-19 07:03:56,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467541159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:56,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:56,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:56,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075919298] [2022-11-19 07:03:56,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:56,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:03:56,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:03:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:03:56,636 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2022-11-19 07:03:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:56,669 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-11-19 07:03:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:03:56,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 7 [2022-11-19 07:03:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:56,670 INFO L225 Difference]: With dead ends: 14 [2022-11-19 07:03:56,670 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 07:03:56,671 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:03:56,672 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 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 [2022-11-19 07:03:56,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:03:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 07:03:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-19 07:03:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 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) [2022-11-19 07:03:56,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-11-19 07:03:56,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2022-11-19 07:03:56,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:56,684 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-11-19 07:03:56,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2022-11-19 07:03:56,685 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-11-19 07:03:56,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:03:56,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:56,686 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:56,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:03:56,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:03:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash -803359244, now seen corresponding path program 1 times [2022-11-19 07:03:56,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:56,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215228581] [2022-11-19 07:03:56,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:56,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:56,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215228581] [2022-11-19 07:03:56,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215228581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501799253] [2022-11-19 07:03:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:56,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:56,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:56,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:56,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:03:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:03:56,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:56,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:57,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501799253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:57,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140414228] [2022-11-19 07:03:57,071 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:03:57,071 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:03:57,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:03:57,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:03:57,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:03:57,391 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:03:57,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '232#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:03:57,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:03:57,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:03:57,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-19 07:03:57,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161477862] [2022-11-19 07:03:57,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:03:57,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:03:57,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:57,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:03:57,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:03:57,868 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 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) [2022-11-19 07:03:57,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:57,990 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-19 07:03:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:03:57,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 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 9 [2022-11-19 07:03:57,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:57,994 INFO L225 Difference]: With dead ends: 30 [2022-11-19 07:03:57,994 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 07:03:57,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:03:58,002 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:58,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:03:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 07:03:58,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-11-19 07:03:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 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) [2022-11-19 07:03:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-11-19 07:03:58,018 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 9 [2022-11-19 07:03:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:58,018 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-11-19 07:03:58,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 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) [2022-11-19 07:03:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-11-19 07:03:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:03:58,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:58,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 07:03:58,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:03:58,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:58,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:03:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:58,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1065881398, now seen corresponding path program 1 times [2022-11-19 07:03:58,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:58,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249797647] [2022-11-19 07:03:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:58,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:58,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:58,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249797647] [2022-11-19 07:03:58,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249797647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:58,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478546219] [2022-11-19 07:03:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:58,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:58,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:58,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:58,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:03:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:58,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:03:58,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:58,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:58,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478546219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:58,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18050757] [2022-11-19 07:03:58,482 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:03:58,482 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:03:58,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:03:58,483 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:03:58,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:03:58,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:03:59,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '383#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:03:59,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:03:59,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:03:59,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-19 07:03:59,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682941360] [2022-11-19 07:03:59,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:03:59,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:03:59,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:59,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:03:59,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:03:59,079 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 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) [2022-11-19 07:03:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:59,182 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-19 07:03:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:03:59,182 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:03:59,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:59,183 INFO L225 Difference]: With dead ends: 30 [2022-11-19 07:03:59,183 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 07:03:59,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:03:59,184 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:59,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:03:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 07:03:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-11-19 07:03:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 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) [2022-11-19 07:03:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-11-19 07:03:59,189 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 11 [2022-11-19 07:03:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:59,189 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-11-19 07:03:59,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 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) [2022-11-19 07:03:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-11-19 07:03:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:03:59,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:59,191 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1] [2022-11-19 07:03:59,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:59,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:59,392 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:03:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:59,392 INFO L85 PathProgramCache]: Analyzing trace with hash 291495106, now seen corresponding path program 2 times [2022-11-19 07:03:59,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:59,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531822093] [2022-11-19 07:03:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:59,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:59,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:59,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531822093] [2022-11-19 07:03:59,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531822093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:59,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292809917] [2022-11-19 07:03:59,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:03:59,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:59,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:59,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:59,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:03:59,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:03:59,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:03:59,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:03:59,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:59,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:59,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292809917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:59,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138087066] [2022-11-19 07:03:59,865 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:03:59,865 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:03:59,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:03:59,866 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:03:59,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:00,043 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:00,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '626#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:00,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:00,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:04:00,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-19 07:04:00,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372383722] [2022-11-19 07:04:00,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:00,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:04:00,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:04:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:04:00,414 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 states have internal predecessors, (47), 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) [2022-11-19 07:04:00,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:00,661 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-11-19 07:04:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:04:00,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 states have internal predecessors, (47), 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 24 [2022-11-19 07:04:00,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:00,662 INFO L225 Difference]: With dead ends: 63 [2022-11-19 07:04:00,662 INFO L226 Difference]: Without dead ends: 62 [2022-11-19 07:04:00,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1158, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:04:00,664 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:00,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 45 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:00,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-19 07:04:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-11-19 07:04:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 55 states have internal predecessors, (61), 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) [2022-11-19 07:04:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-11-19 07:04:00,672 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 24 [2022-11-19 07:04:00,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:00,672 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-11-19 07:04:00,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 states have internal predecessors, (47), 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) [2022-11-19 07:04:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-11-19 07:04:00,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:04:00,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:00,674 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1] [2022-11-19 07:04:00,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:00,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:00,885 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:04:00,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:00,886 INFO L85 PathProgramCache]: Analyzing trace with hash 953924228, now seen corresponding path program 2 times [2022-11-19 07:04:00,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:00,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981113950] [2022-11-19 07:04:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:00,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:01,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:01,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981113950] [2022-11-19 07:04:01,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981113950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:01,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854179016] [2022-11-19 07:04:01,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:04:01,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:01,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:01,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:01,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:04:01,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:04:01,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:04:01,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:04:01,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:01,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:01,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854179016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:01,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909870836] [2022-11-19 07:04:01,415 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:04:01,416 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:01,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:01,416 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:01,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:01,555 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:01,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '966#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:01,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:01,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:04:01,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-19 07:04:01,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225533847] [2022-11-19 07:04:01,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:01,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:04:01,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:04:01,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:04:01,962 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 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) [2022-11-19 07:04:02,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:02,240 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-11-19 07:04:02,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:04:02,240 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 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 26 [2022-11-19 07:04:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:02,243 INFO L225 Difference]: With dead ends: 60 [2022-11-19 07:04:02,243 INFO L226 Difference]: Without dead ends: 59 [2022-11-19 07:04:02,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=326, Invalid=1156, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:04:02,245 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:02,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 36 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:02,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-19 07:04:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-11-19 07:04:02,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 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) [2022-11-19 07:04:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-11-19 07:04:02,252 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 26 [2022-11-19 07:04:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:02,253 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-11-19 07:04:02,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 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) [2022-11-19 07:04:02,253 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-11-19 07:04:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 07:04:02,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:02,255 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1] [2022-11-19 07:04:02,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 07:04:02,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:02,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:04:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:02,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1862645118, now seen corresponding path program 3 times [2022-11-19 07:04:02,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:02,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496973096] [2022-11-19 07:04:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:02,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:02,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496973096] [2022-11-19 07:04:02,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496973096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:02,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18814731] [2022-11-19 07:04:02,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:04:02,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:02,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:02,955 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:02,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:04:03,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:04:03,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:04:03,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:04:03,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:03,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:03,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18814731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:03,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087791865] [2022-11-19 07:04:03,769 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:04:03,770 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:03,770 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:03,770 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:03,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:03,895 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:04,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1497#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:04,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:04,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:04:04,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-19 07:04:04,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386712935] [2022-11-19 07:04:04,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:04,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-19 07:04:04,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:04,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-19 07:04:04,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=2187, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 07:04:04,299 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 46 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) [2022-11-19 07:04:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:04,992 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2022-11-19 07:04:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-19 07:04:04,993 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 46 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 54 [2022-11-19 07:04:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:04,994 INFO L225 Difference]: With dead ends: 129 [2022-11-19 07:04:04,994 INFO L226 Difference]: Without dead ends: 128 [2022-11-19 07:04:04,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1350, Invalid=4200, Unknown=0, NotChecked=0, Total=5550 [2022-11-19 07:04:04,997 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 213 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:04,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 88 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:04,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-19 07:04:05,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-11-19 07:04:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 115 states have internal predecessors, (127), 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) [2022-11-19 07:04:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2022-11-19 07:04:05,008 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 54 [2022-11-19 07:04:05,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:05,009 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2022-11-19 07:04:05,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 46 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) [2022-11-19 07:04:05,010 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2022-11-19 07:04:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 07:04:05,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:05,011 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1] [2022-11-19 07:04:05,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:05,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 07:04:05,218 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:04:05,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:05,218 INFO L85 PathProgramCache]: Analyzing trace with hash 999405636, now seen corresponding path program 3 times [2022-11-19 07:04:05,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:05,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650860568] [2022-11-19 07:04:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:05,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:05,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:05,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650860568] [2022-11-19 07:04:05,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650860568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:05,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448385065] [2022-11-19 07:04:05,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:04:05,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:05,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:05,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:05,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:04:05,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:04:05,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:04:05,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:04:05,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:05,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:06,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448385065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1027234456] [2022-11-19 07:04:06,459 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:04:06,459 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:06,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:06,459 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:06,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:06,584 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:07,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2215#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:07,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:07,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:04:07,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-19 07:04:07,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995617611] [2022-11-19 07:04:07,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:07,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-19 07:04:07,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:07,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-19 07:04:07,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=2186, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 07:04:07,009 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 46 states have internal predecessors, (111), 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) [2022-11-19 07:04:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:07,668 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2022-11-19 07:04:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-19 07:04:07,669 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 46 states have internal predecessors, (111), 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 56 [2022-11-19 07:04:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:07,670 INFO L225 Difference]: With dead ends: 120 [2022-11-19 07:04:07,670 INFO L226 Difference]: Without dead ends: 119 [2022-11-19 07:04:07,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1352, Invalid=4198, Unknown=0, NotChecked=0, Total=5550 [2022-11-19 07:04:07,672 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 116 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:07,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 88 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-19 07:04:07,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-11-19 07:04:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 117 states have internal predecessors, (118), 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) [2022-11-19 07:04:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2022-11-19 07:04:07,682 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 56 [2022-11-19 07:04:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:07,683 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2022-11-19 07:04:07,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 46 states have internal predecessors, (111), 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) [2022-11-19 07:04:07,683 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2022-11-19 07:04:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:04:07,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:07,686 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1] [2022-11-19 07:04:07,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 07:04:07,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:04:07,892 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:04:07,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:07,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1927842302, now seen corresponding path program 4 times [2022-11-19 07:04:07,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:07,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252247085] [2022-11-19 07:04:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:07,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:09,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:09,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252247085] [2022-11-19 07:04:09,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252247085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:09,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918037242] [2022-11-19 07:04:09,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:04:09,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:09,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:09,493 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:09,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:04:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:09,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 07:04:09,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:09,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:11,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918037242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:11,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218899835] [2022-11-19 07:04:11,865 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:04:11,866 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:11,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:11,866 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:11,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:12,037 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:12,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3322#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:12,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:12,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:04:12,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-11-19 07:04:12,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034991368] [2022-11-19 07:04:12,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:12,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-19 07:04:12,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:12,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-19 07:04:12,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2273, Invalid=7827, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 07:04:12,580 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 94 states, 93 states have (on average 2.4408602150537635) internal successors, (227), 94 states have internal predecessors, (227), 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) [2022-11-19 07:04:14,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:14,506 INFO L93 Difference]: Finished difference Result 261 states and 284 transitions. [2022-11-19 07:04:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-19 07:04:14,507 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.4408602150537635) internal successors, (227), 94 states have internal predecessors, (227), 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 114 [2022-11-19 07:04:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:14,508 INFO L225 Difference]: With dead ends: 261 [2022-11-19 07:04:14,508 INFO L226 Difference]: Without dead ends: 260 [2022-11-19 07:04:14,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5040 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5562, Invalid=15900, Unknown=0, NotChecked=0, Total=21462 [2022-11-19 07:04:14,514 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 494 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:14,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 135 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:04:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-19 07:04:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2022-11-19 07:04:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 234 states have (on average 1.106837606837607) internal successors, (259), 235 states have internal predecessors, (259), 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) [2022-11-19 07:04:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 259 transitions. [2022-11-19 07:04:14,531 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 259 transitions. Word has length 114 [2022-11-19 07:04:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:14,531 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 259 transitions. [2022-11-19 07:04:14,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.4408602150537635) internal successors, (227), 94 states have internal predecessors, (227), 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) [2022-11-19 07:04:14,532 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 259 transitions. [2022-11-19 07:04:14,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:04:14,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:14,533 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1] [2022-11-19 07:04:14,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:14,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:14,739 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:04:14,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1525546044, now seen corresponding path program 4 times [2022-11-19 07:04:14,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:14,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263914209] [2022-11-19 07:04:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:16,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:16,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263914209] [2022-11-19 07:04:16,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263914209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:16,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86245242] [2022-11-19 07:04:16,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:04:16,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:16,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:16,528 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:16,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:04:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:16,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-19 07:04:16,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:16,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:18,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86245242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:18,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393431453] [2022-11-19 07:04:18,786 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:04:18,786 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:18,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:18,787 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:18,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:18,914 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:19,408 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4796#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:19,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:19,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:04:19,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-11-19 07:04:19,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198742873] [2022-11-19 07:04:19,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:19,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-19 07:04:19,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:19,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-19 07:04:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2274, Invalid=7826, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 07:04:19,414 INFO L87 Difference]: Start difference. First operand 236 states and 259 transitions. Second operand has 94 states, 93 states have (on average 2.4838709677419355) internal successors, (231), 94 states have internal predecessors, (231), 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) [2022-11-19 07:04:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:21,260 INFO L93 Difference]: Finished difference Result 240 states and 263 transitions. [2022-11-19 07:04:21,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-19 07:04:21,261 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.4838709677419355) internal successors, (231), 94 states have internal predecessors, (231), 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 116 [2022-11-19 07:04:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:21,262 INFO L225 Difference]: With dead ends: 240 [2022-11-19 07:04:21,262 INFO L226 Difference]: Without dead ends: 239 [2022-11-19 07:04:21,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5037 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5564, Invalid=15898, Unknown=0, NotChecked=0, Total=21462 [2022-11-19 07:04:21,265 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 326 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:21,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 130 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:04:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-19 07:04:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-11-19 07:04:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 237 states have internal predecessors, (238), 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) [2022-11-19 07:04:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2022-11-19 07:04:21,282 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 116 [2022-11-19 07:04:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:21,283 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2022-11-19 07:04:21,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.4838709677419355) internal successors, (231), 94 states have internal predecessors, (231), 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) [2022-11-19 07:04:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2022-11-19 07:04:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-19 07:04:21,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:21,287 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1] [2022-11-19 07:04:21,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:21,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:04:21,493 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:04:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash 33754370, now seen corresponding path program 5 times [2022-11-19 07:04:21,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:21,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953830895] [2022-11-19 07:04:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:21,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:26,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:26,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953830895] [2022-11-19 07:04:26,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953830895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:26,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125564884] [2022-11-19 07:04:26,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:04:26,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:26,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:26,896 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:26,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:04:27,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-19 07:04:27,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:04:27,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-19 07:04:27,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:27,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:35,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125564884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:35,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421908346] [2022-11-19 07:04:35,320 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:04:35,320 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:35,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:35,321 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:35,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:35,433 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:36,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7055#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:36,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:36,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:04:36,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2022-11-19 07:04:36,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898132266] [2022-11-19 07:04:36,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:36,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-11-19 07:04:36,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:36,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-11-19 07:04:36,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9137, Invalid=29475, Unknown=0, NotChecked=0, Total=38612 [2022-11-19 07:04:36,173 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand has 190 states, 189 states have (on average 2.4708994708994707) internal successors, (467), 190 states have internal predecessors, (467), 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) [2022-11-19 07:04:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:43,098 INFO L93 Difference]: Finished difference Result 525 states and 572 transitions. [2022-11-19 07:04:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-11-19 07:04:43,098 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.4708994708994707) internal successors, (467), 190 states have internal predecessors, (467), 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 234 [2022-11-19 07:04:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:43,101 INFO L225 Difference]: With dead ends: 525 [2022-11-19 07:04:43,101 INFO L226 Difference]: Without dead ends: 524 [2022-11-19 07:04:43,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19344 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=22626, Invalid=61764, Unknown=0, NotChecked=0, Total=84390 [2022-11-19 07:04:43,108 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1028 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:43,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 275 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:04:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-11-19 07:04:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 476. [2022-11-19 07:04:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 474 states have (on average 1.1033755274261603) internal successors, (523), 475 states have internal predecessors, (523), 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) [2022-11-19 07:04:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 523 transitions. [2022-11-19 07:04:43,130 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 523 transitions. Word has length 234 [2022-11-19 07:04:43,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:43,130 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 523 transitions. [2022-11-19 07:04:43,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.4708994708994707) internal successors, (467), 190 states have internal predecessors, (467), 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) [2022-11-19 07:04:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 523 transitions. [2022-11-19 07:04:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-19 07:04:43,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:43,135 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1] [2022-11-19 07:04:43,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:43,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:04:43,343 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:04:43,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:43,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1921787196, now seen corresponding path program 5 times [2022-11-19 07:04:43,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:43,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859717426] [2022-11-19 07:04:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:43,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:48,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:48,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859717426] [2022-11-19 07:04:48,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859717426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:48,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560754740] [2022-11-19 07:04:48,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:04:48,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:48,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:48,489 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:48,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:04:48,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-19 07:04:48,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:04:48,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-19 07:04:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:49,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:56,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560754740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:56,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020224622] [2022-11-19 07:04:56,604 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:04:56,604 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:56,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:56,604 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:56,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:56,727 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:57,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10041#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:57,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:57,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:04:57,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2022-11-19 07:04:57,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006409240] [2022-11-19 07:04:57,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:57,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-11-19 07:04:57,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:57,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-11-19 07:04:57,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9138, Invalid=29474, Unknown=0, NotChecked=0, Total=38612 [2022-11-19 07:04:57,483 INFO L87 Difference]: Start difference. First operand 476 states and 523 transitions. Second operand has 190 states, 189 states have (on average 2.492063492063492) internal successors, (471), 190 states have internal predecessors, (471), 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) [2022-11-19 07:05:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:04,323 INFO L93 Difference]: Finished difference Result 480 states and 527 transitions. [2022-11-19 07:05:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-11-19 07:05:04,323 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.492063492063492) internal successors, (471), 190 states have internal predecessors, (471), 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 236 [2022-11-19 07:05:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:04,326 INFO L225 Difference]: With dead ends: 480 [2022-11-19 07:05:04,326 INFO L226 Difference]: Without dead ends: 479 [2022-11-19 07:05:04,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19341 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=22628, Invalid=61762, Unknown=0, NotChecked=0, Total=84390 [2022-11-19 07:05:04,333 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 893 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:04,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 218 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:05:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-19 07:05:04,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 478. [2022-11-19 07:05:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 476 states have (on average 1.004201680672269) internal successors, (478), 477 states have internal predecessors, (478), 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) [2022-11-19 07:05:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 478 transitions. [2022-11-19 07:05:04,351 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 478 transitions. Word has length 236 [2022-11-19 07:05:04,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:04,351 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 478 transitions. [2022-11-19 07:05:04,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.492063492063492) internal successors, (471), 190 states have internal predecessors, (471), 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) [2022-11-19 07:05:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 478 transitions. [2022-11-19 07:05:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-11-19 07:05:04,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:04,362 INFO L195 NwaCegarLoop]: trace histogram [95, 94, 94, 94, 94, 1, 1, 1] [2022-11-19 07:05:04,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:04,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:05:04,569 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:05:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1625343230, now seen corresponding path program 6 times [2022-11-19 07:05:04,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:04,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660150693] [2022-11-19 07:05:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:04,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:24,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:24,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660150693] [2022-11-19 07:05:24,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660150693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:24,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721466605] [2022-11-19 07:05:24,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:05:24,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:24,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:24,862 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:24,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:05:25,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:05:25,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:05:25,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-19 07:05:25,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:25,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:54,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721466605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:54,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [828127200] [2022-11-19 07:05:54,890 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:05:54,890 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:05:54,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:05:54,890 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:05:54,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:05:55,008 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:05:56,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14604#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:05:56,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:05:56,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:05:56,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2022-11-19 07:05:56,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546097171] [2022-11-19 07:05:56,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:05:56,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2022-11-19 07:05:56,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:56,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2022-11-19 07:05:56,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36689, Invalid=114243, Unknown=0, NotChecked=0, Total=150932 [2022-11-19 07:05:56,242 INFO L87 Difference]: Start difference. First operand 478 states and 478 transitions. Second operand has 382 states, 381 states have (on average 2.4855643044619424) internal successors, (947), 382 states have internal predecessors, (947), 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) [2022-11-19 07:06:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:28,075 INFO L93 Difference]: Finished difference Result 1053 states and 1148 transitions. [2022-11-19 07:06:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2022-11-19 07:06:28,076 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 2.4855643044619424) internal successors, (947), 382 states have internal predecessors, (947), 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 474 [2022-11-19 07:06:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:28,080 INFO L225 Difference]: With dead ends: 1053 [2022-11-19 07:06:28,080 INFO L226 Difference]: Without dead ends: 1052 [2022-11-19 07:06:28,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1801 GetRequests, 1224 SyntacticMatches, 0 SemanticMatches, 577 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75600 ImplicationChecksByTransitivity, 61.1s TimeCoverageRelationStatistics Valid=91314, Invalid=243348, Unknown=0, NotChecked=0, Total=334662 [2022-11-19 07:06:28,096 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2452 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:28,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 519 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:06:28,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-11-19 07:06:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 956. [2022-11-19 07:06:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 954 states have (on average 1.10167714884696) internal successors, (1051), 955 states have internal predecessors, (1051), 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) [2022-11-19 07:06:28,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1051 transitions. [2022-11-19 07:06:28,128 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1051 transitions. Word has length 474 [2022-11-19 07:06:28,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:28,129 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 1051 transitions. [2022-11-19 07:06:28,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 2.4855643044619424) internal successors, (947), 382 states have internal predecessors, (947), 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) [2022-11-19 07:06:28,130 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1051 transitions. [2022-11-19 07:06:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-11-19 07:06:28,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:28,140 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1] [2022-11-19 07:06:28,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:28,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:28,347 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:06:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1413253316, now seen corresponding path program 6 times [2022-11-19 07:06:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:28,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352596351] [2022-11-19 07:06:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:28,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:06:47,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:47,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352596351] [2022-11-19 07:06:47,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352596351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:47,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313415544] [2022-11-19 07:06:47,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:06:47,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:47,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:47,355 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:47,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:06:47,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:06:47,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:06:47,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 191 conjunts are in the unsatisfiable core [2022-11-19 07:06:47,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:06:48,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:07:17,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313415544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:17,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [548511750] [2022-11-19 07:07:17,823 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:07:17,823 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:07:17,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:07:17,824 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:07:17,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:07:17,937 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:07:19,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20614#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:07:19,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:07:19,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:07:19,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2022-11-19 07:07:19,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003581113] [2022-11-19 07:07:19,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:07:19,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2022-11-19 07:07:19,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:07:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2022-11-19 07:07:19,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36690, Invalid=114242, Unknown=0, NotChecked=0, Total=150932 [2022-11-19 07:07:19,180 INFO L87 Difference]: Start difference. First operand 956 states and 1051 transitions. Second operand has 382 states, 381 states have (on average 2.4960629921259843) internal successors, (951), 382 states have internal predecessors, (951), 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) [2022-11-19 07:07:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:51,230 INFO L93 Difference]: Finished difference Result 960 states and 1055 transitions. [2022-11-19 07:07:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2022-11-19 07:07:51,231 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 2.4960629921259843) internal successors, (951), 382 states have internal predecessors, (951), 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 476 [2022-11-19 07:07:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:51,235 INFO L225 Difference]: With dead ends: 960 [2022-11-19 07:07:51,235 INFO L226 Difference]: Without dead ends: 959 [2022-11-19 07:07:51,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1807 GetRequests, 1230 SyntacticMatches, 0 SemanticMatches, 577 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75597 ImplicationChecksByTransitivity, 61.7s TimeCoverageRelationStatistics Valid=91316, Invalid=243346, Unknown=0, NotChecked=0, Total=334662 [2022-11-19 07:07:51,258 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1822 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1822 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:51,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1822 Valid, 442 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:07:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-11-19 07:07:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 958. [2022-11-19 07:07:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 956 states have (on average 1.002092050209205) internal successors, (958), 957 states have internal predecessors, (958), 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) [2022-11-19 07:07:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 958 transitions. [2022-11-19 07:07:51,290 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 958 transitions. Word has length 476 [2022-11-19 07:07:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:51,291 INFO L495 AbstractCegarLoop]: Abstraction has 958 states and 958 transitions. [2022-11-19 07:07:51,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 2.4960629921259843) internal successors, (951), 382 states have internal predecessors, (951), 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) [2022-11-19 07:07:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 958 transitions. [2022-11-19 07:07:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2022-11-19 07:07:51,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:51,300 INFO L195 NwaCegarLoop]: trace histogram [191, 190, 190, 190, 190, 1, 1, 1] [2022-11-19 07:07:51,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:51,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:07:51,512 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:07:51,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:51,513 INFO L85 PathProgramCache]: Analyzing trace with hash 711694082, now seen corresponding path program 7 times [2022-11-19 07:07:51,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:07:51,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512305071] [2022-11-19 07:07:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:51,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:07:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:09:28,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:09:28,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512305071] [2022-11-19 07:09:28,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512305071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:09:28,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783118825] [2022-11-19 07:09:28,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:09:28,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:09:28,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:09:28,569 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:09:28,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:09:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:29,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 2503 conjuncts, 384 conjunts are in the unsatisfiable core [2022-11-19 07:09:29,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:09:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:09:30,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:11:27,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783118825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:11:27,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [693059895] [2022-11-19 07:11:27,913 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:11:27,913 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:11:27,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:11:27,913 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:11:27,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:11:28,024 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:11:30,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29785#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:11:30,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:11:30,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:11:30,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2022-11-19 07:11:30,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918295761] [2022-11-19 07:11:30,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:11:30,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2022-11-19 07:11:30,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:11:30,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2022-11-19 07:11:30,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147089, Invalid=449667, Unknown=0, NotChecked=0, Total=596756 [2022-11-19 07:11:30,256 INFO L87 Difference]: Start difference. First operand 958 states and 958 transitions. Second operand has 766 states, 765 states have (on average 2.49281045751634) internal successors, (1907), 766 states have internal predecessors, (1907), 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) [2022-11-19 07:15:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:15:11,164 INFO L93 Difference]: Finished difference Result 2109 states and 2300 transitions. [2022-11-19 07:15:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 767 states. [2022-11-19 07:15:11,166 INFO L78 Accepts]: Start accepts. Automaton has has 766 states, 765 states have (on average 2.49281045751634) internal successors, (1907), 766 states have internal predecessors, (1907), 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 954 [2022-11-19 07:15:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:15:11,173 INFO L225 Difference]: With dead ends: 2109 [2022-11-19 07:15:11,173 INFO L226 Difference]: Without dead ends: 2108 [2022-11-19 07:15:11,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3625 GetRequests, 2472 SyntacticMatches, 0 SemanticMatches, 1153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298704 ImplicationChecksByTransitivity, 244.2s TimeCoverageRelationStatistics Valid=366930, Invalid=965940, Unknown=0, NotChecked=0, Total=1332870 [2022-11-19 07:15:11,242 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7165 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7165 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:15:11,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7165 Valid, 1017 Invalid, 2150 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [200 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-19 07:15:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2022-11-19 07:15:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1916. [2022-11-19 07:15:11,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1914 states have (on average 1.100835945663532) internal successors, (2107), 1915 states have internal predecessors, (2107), 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) [2022-11-19 07:15:11,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2107 transitions. [2022-11-19 07:15:11,301 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2107 transitions. Word has length 954 [2022-11-19 07:15:11,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:15:11,302 INFO L495 AbstractCegarLoop]: Abstraction has 1916 states and 2107 transitions. [2022-11-19 07:15:11,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 766 states, 765 states have (on average 2.49281045751634) internal successors, (1907), 766 states have internal predecessors, (1907), 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) [2022-11-19 07:15:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2107 transitions. [2022-11-19 07:15:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2022-11-19 07:15:11,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:15:11,312 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 190, 190, 1, 1, 1] [2022-11-19 07:15:11,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:15:11,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:15:11,523 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-19 07:15:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:15:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1038214340, now seen corresponding path program 7 times [2022-11-19 07:15:11,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:15:11,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394052104] [2022-11-19 07:15:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:11,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:15:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:45,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:45,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394052104] [2022-11-19 07:16:45,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394052104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:45,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287602910] [2022-11-19 07:16:45,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:16:45,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:45,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:45,816 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:45,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc16b632-fb60-42c9-acb8-b40106eeaf59/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:16:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:46,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 383 conjunts are in the unsatisfiable core [2022-11-19 07:16:46,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:47,671 INFO L328 TraceCheckSpWp]: Computing backward predicates...