./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_2-1-simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_2-1-simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef2ac183abfa5be888591001d2f7376a659c701d3e7fb64cad1cba56a829d8b3 --- 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-2329fc7 [2022-12-14 13:47:49,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:47:49,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:47:49,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:47:49,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:47:49,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:47:49,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:47:49,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:47:49,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:47:49,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:47:49,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:47:49,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:47:49,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:47:49,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:47:49,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:47:49,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:47:49,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:47:49,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:47:49,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:47:49,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:47:49,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:47:49,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:47:49,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:47:49,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:47:49,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:47:49,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:47:49,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:47:49,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:47:49,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:47:49,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:47:49,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:47:49,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:47:49,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:47:49,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:47:49,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:47:49,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:47:49,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:47:49,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:47:49,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:47:49,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:47:49,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:47:49,500 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:47:49,514 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:47:49,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:47:49,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:47:49,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:47:49,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:47:49,515 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:47:49,515 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:47:49,515 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:47:49,515 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:47:49,515 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:47:49,515 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:47:49,515 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:47:49,515 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:47:49,516 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:47:49,516 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:47:49,516 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:47:49,516 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:47:49,516 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:47:49,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:47:49,517 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:47:49,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:47:49,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:47:49,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:47:49,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:47:49,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:47:49,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:47:49,517 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:47:49,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:47:49,517 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:47:49,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:47:49,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:47:49,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:47:49,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:47:49,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:47:49,518 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:47:49,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:47:49,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:47:49,518 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:47:49,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:47:49,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:47:49,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:47:49,519 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_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef2ac183abfa5be888591001d2f7376a659c701d3e7fb64cad1cba56a829d8b3 [2022-12-14 13:47:49,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:47:49,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:47:49,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:47:49,723 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:47:49,724 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:47:49,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loop-acceleration/array_2-1-simple.i [2022-12-14 13:47:52,394 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:47:52,559 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:47:52,560 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i [2022-12-14 13:47:52,565 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/data/2f3d30c2b/a213808daf5f441182ccb3f64b977430/FLAGc0eeaa2af [2022-12-14 13:47:52,575 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/data/2f3d30c2b/a213808daf5f441182ccb3f64b977430 [2022-12-14 13:47:52,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:47:52,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:47:52,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:47:52,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:47:52,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:47:52,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aa9254c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52, skipping insertion in model container [2022-12-14 13:47:52,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:47:52,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:47:52,706 WARN L237 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_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i[809,822] [2022-12-14 13:47:52,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:47:52,725 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:47:52,733 WARN L237 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_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i[809,822] [2022-12-14 13:47:52,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:47:52,747 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:47:52,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52 WrapperNode [2022-12-14 13:47:52,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:47:52,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:47:52,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:47:52,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:47:52,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,778 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2022-12-14 13:47:52,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:47:52,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:47:52,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:47:52,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:47:52,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,798 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:47:52,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:47:52,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:47:52,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:47:52,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52" (1/1) ... [2022-12-14 13:47:52,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:47:52,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:47:52,829 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:47:52,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:47:52,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:47:52,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:47:52,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-12-14 13:47:52,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:47:52,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:47:52,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:47:52,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:47:52,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:47:52,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:47:52,926 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:47:52,928 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:47:53,004 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:47:53,025 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:47:53,025 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 13:47:53,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:47:53 BoogieIcfgContainer [2022-12-14 13:47:53,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:47:53,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:47:53,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:47:53,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:47:53,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:47:52" (1/3) ... [2022-12-14 13:47:53,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea3c21d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:47:53, skipping insertion in model container [2022-12-14 13:47:53,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:47:52" (2/3) ... [2022-12-14 13:47:53,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea3c21d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:47:53, skipping insertion in model container [2022-12-14 13:47:53,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:47:53" (3/3) ... [2022-12-14 13:47:53,036 INFO L112 eAbstractionObserver]: Analyzing ICFG array_2-1-simple.i [2022-12-14 13:47:53,051 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:47:53,051 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:47:53,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:47:53,094 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;@6c650aa2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:47:53,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:47:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:53,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:47:53,103 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:47:53,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:47:53,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:47:53,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:47:53,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1941830, now seen corresponding path program 1 times [2022-12-14 13:47:53,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:47:53,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186007709] [2022-12-14 13:47:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:47:53,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:47:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:47:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:53,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:47:53,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186007709] [2022-12-14 13:47:53,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186007709] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:47:53,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:47:53,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:47:53,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210903294] [2022-12-14 13:47:53,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:47:53,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:47:53,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:47:53,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:47:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:47:53,341 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:47:53,367 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-12-14 13:47:53,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:47:53,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 13:47:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:47:53,376 INFO L225 Difference]: With dead ends: 13 [2022-12-14 13:47:53,376 INFO L226 Difference]: Without dead ends: 6 [2022-12-14 13:47:53,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:47:53,382 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:47:53,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:47:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-12-14 13:47:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-12-14 13:47:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-12-14 13:47:53,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-12-14 13:47:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:47:53,408 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-12-14 13:47:53,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-12-14 13:47:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:47:53,409 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:47:53,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 13:47:53,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:47:53,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:47:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:47:53,410 INFO L85 PathProgramCache]: Analyzing trace with hash 60064071, now seen corresponding path program 1 times [2022-12-14 13:47:53,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:47:53,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739310296] [2022-12-14 13:47:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:47:53,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:47:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:47:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:53,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:47:53,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739310296] [2022-12-14 13:47:53,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739310296] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:47:53,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021664078] [2022-12-14 13:47:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:47:53,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:47:53,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:47:53,488 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:47:53,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:47:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:47:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:47:53,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:47:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:53,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:47:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:53,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021664078] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:47:53,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [844142968] [2022-12-14 13:47:53,616 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 13:47:53,616 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:47:53,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:47:53,622 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:47:53,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:47:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:53,731 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:47:53,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 13:47:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:53,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:53,784 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:47:53,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 13:47:53,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:53,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:53,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:47:53,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 13:47:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:53,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2022-12-14 13:47:53,966 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 13:47:53,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 277 treesize of output 266 [2022-12-14 13:47:54,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:47:54,079 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:47:54,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 13:47:54,104 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:47:54,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:47:54,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:47:54,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:47:54,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 13:47:54,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037857415] [2022-12-14 13:47:54,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:47:54,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:47:54,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:47:54,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:47:54,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:47:54,209 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:54,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:47:54,225 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2022-12-14 13:47:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:47:54,225 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 13:47:54,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:47:54,226 INFO L225 Difference]: With dead ends: 12 [2022-12-14 13:47:54,226 INFO L226 Difference]: Without dead ends: 9 [2022-12-14 13:47:54,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:47:54,227 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:47:54,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:47:54,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-12-14 13:47:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-12-14 13:47:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-12-14 13:47:54,231 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-12-14 13:47:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:47:54,231 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-12-14 13:47:54,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-12-14 13:47:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:47:54,231 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:47:54,232 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-12-14 13:47:54,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:47:54,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:47:54,433 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:47:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:47:54,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1764353658, now seen corresponding path program 2 times [2022-12-14 13:47:54,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:47:54,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661831826] [2022-12-14 13:47:54,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:47:54,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:47:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:47:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:54,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:47:54,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661831826] [2022-12-14 13:47:54,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661831826] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:47:54,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968776265] [2022-12-14 13:47:54,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:47:54,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:47:54,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:47:54,573 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:47:54,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:47:54,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:47:54,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:47:54,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:47:54,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:47:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:54,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:47:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:54,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968776265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:47:54,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [381636216] [2022-12-14 13:47:54,685 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 13:47:54,685 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:47:54,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:47:54,686 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:47:54,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:47:54,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:54,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:47:54,710 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 13:47:54,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 13:47:54,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:54,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:54,744 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:47:54,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 13:47:54,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:54,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:54,785 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:47:54,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 13:47:54,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:54,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:54,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2022-12-14 13:47:54,876 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 13:47:54,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 277 treesize of output 266 [2022-12-14 13:47:54,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:47:54,956 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:47:54,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 13:47:54,967 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:47:55,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:47:55,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:47:55,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:47:55,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 13:47:55,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103808322] [2022-12-14 13:47:55,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:47:55,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 13:47:55,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:47:55,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 13:47:55,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:47:55,062 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:55,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:47:55,087 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-12-14 13:47:55,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:47:55,087 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 13:47:55,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:47:55,088 INFO L225 Difference]: With dead ends: 18 [2022-12-14 13:47:55,088 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 13:47:55,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:47:55,089 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:47:55,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:47:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 13:47:55,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 13:47:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:55,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-12-14 13:47:55,093 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-12-14 13:47:55,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:47:55,094 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-12-14 13:47:55,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:55,094 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-12-14 13:47:55,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:47:55,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:47:55,094 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2022-12-14 13:47:55,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:47:55,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:47:55,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:47:55,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:47:55,296 INFO L85 PathProgramCache]: Analyzing trace with hash 193090022, now seen corresponding path program 3 times [2022-12-14 13:47:55,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:47:55,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425512111] [2022-12-14 13:47:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:47:55,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:47:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:47:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:55,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:47:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425512111] [2022-12-14 13:47:55,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425512111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:47:55,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996980632] [2022-12-14 13:47:55,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:47:55,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:47:55,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:47:55,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:47:55,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:47:55,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:47:55,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:47:55,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:47:55,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:47:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:55,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:47:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:55,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996980632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:47:55,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1712604169] [2022-12-14 13:47:55,713 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 13:47:55,713 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:47:55,713 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:47:55,713 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:47:55,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:47:55,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:55,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:55,747 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:47:55,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 13:47:55,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:55,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:55,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:47:55,766 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 13:47:55,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 13:47:55,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:55,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:55,799 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:47:55,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 13:47:55,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:55,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:55,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2022-12-14 13:47:55,878 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 13:47:55,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 281 treesize of output 268 [2022-12-14 13:47:55,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:47:55,945 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:47:55,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 13:47:55,954 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:47:56,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:47:56,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:47:56,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:47:56,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 13:47:56,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880650118] [2022-12-14 13:47:56,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:47:56,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 13:47:56,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:47:56,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 13:47:56,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-12-14 13:47:56,041 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 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) [2022-12-14 13:47:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:47:56,073 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2022-12-14 13:47:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 13:47:56,073 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 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) Word has length 14 [2022-12-14 13:47:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:47:56,074 INFO L225 Difference]: With dead ends: 30 [2022-12-14 13:47:56,074 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 13:47:56,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-12-14 13:47:56,076 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:47:56,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:47:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 13:47:56,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 13:47:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:56,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-12-14 13:47:56,079 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-12-14 13:47:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:47:56,079 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-12-14 13:47:56,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 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) [2022-12-14 13:47:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-12-14 13:47:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 13:47:56,080 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:47:56,080 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2022-12-14 13:47:56,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:47:56,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:47:56,282 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:47:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:47:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1874160294, now seen corresponding path program 4 times [2022-12-14 13:47:56,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:47:56,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310223508] [2022-12-14 13:47:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:47:56,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:47:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:47:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:56,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:47:56,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310223508] [2022-12-14 13:47:56,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310223508] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:47:56,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131410667] [2022-12-14 13:47:56,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:47:56,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:47:56,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:47:56,827 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:47:56,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:47:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:47:56,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:47:56,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:47:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:56,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:47:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:57,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131410667] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:47:57,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1227988413] [2022-12-14 13:47:57,423 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 13:47:57,423 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:47:57,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:47:57,424 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:47:57,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:47:57,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:57,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:57,454 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:47:57,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 13:47:57,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:57,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:47:57,471 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 13:47:57,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 13:47:57,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:57,504 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:47:57,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 13:47:57,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:57,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:47:57,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2022-12-14 13:47:57,597 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 13:47:57,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 281 treesize of output 268 [2022-12-14 13:47:57,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:47:57,653 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:47:57,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 13:47:57,661 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:47:57,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '624#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:47:57,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:47:57,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:47:57,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-14 13:47:57,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571355393] [2022-12-14 13:47:57,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:47:57,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 13:47:57,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:47:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 13:47:57,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 13:47:57,744 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:57,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:47:57,798 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-12-14 13:47:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 13:47:57,799 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 13:47:57,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:47:57,800 INFO L225 Difference]: With dead ends: 54 [2022-12-14 13:47:57,800 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 13:47:57,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 13:47:57,801 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:47:57,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:47:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 13:47:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-14 13:47:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 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) [2022-12-14 13:47:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-12-14 13:47:57,805 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-12-14 13:47:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:47:57,806 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-12-14 13:47:57,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:47:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-12-14 13:47:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 13:47:57,806 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:47:57,807 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2022-12-14 13:47:57,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 13:47:58,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:47:58,008 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:47:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:47:58,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1326564314, now seen corresponding path program 5 times [2022-12-14 13:47:58,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:47:58,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331625041] [2022-12-14 13:47:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:47:58,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:47:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:47:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:47:59,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:47:59,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331625041] [2022-12-14 13:47:59,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331625041] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:47:59,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853525876] [2022-12-14 13:47:59,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:47:59,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:47:59,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:47:59,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:47:59,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:48:01,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-12-14 13:48:01,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:48:01,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 13:48:01,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:01,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:02,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853525876] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:48:02,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [960059648] [2022-12-14 13:48:02,996 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 13:48:02,996 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:48:02,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:48:02,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:48:02,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:48:03,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:03,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:03,025 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:48:03,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 13:48:03,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:03,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:03,055 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:48:03,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 13:48:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:03,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:48:03,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 13:48:03,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:03,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:03,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2022-12-14 13:48:03,139 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 13:48:03,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 277 treesize of output 266 [2022-12-14 13:48:03,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:48:03,210 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:48:03,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 13:48:03,220 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:48:03,358 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1217#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:48:03,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:48:03,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:48:03,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-12-14 13:48:03,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795917794] [2022-12-14 13:48:03,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:48:03,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 13:48:03,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:03,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 13:48:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 13:48:03,367 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:03,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:03,470 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2022-12-14 13:48:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 13:48:03,470 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 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 50 [2022-12-14 13:48:03,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:03,472 INFO L225 Difference]: With dead ends: 102 [2022-12-14 13:48:03,472 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 13:48:03,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 13:48:03,474 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:03,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 13:48:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-12-14 13:48:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:03,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-12-14 13:48:03,480 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2022-12-14 13:48:03,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:03,480 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-12-14 13:48:03,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:03,481 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-12-14 13:48:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 13:48:03,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:03,482 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2022-12-14 13:48:03,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:48:03,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:03,684 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:03,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:03,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1575640870, now seen corresponding path program 6 times [2022-12-14 13:48:03,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:03,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92678233] [2022-12-14 13:48:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:03,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:07,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:07,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92678233] [2022-12-14 13:48:07,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92678233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:07,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693142171] [2022-12-14 13:48:07,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:48:07,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:07,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:07,270 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:07,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:48:07,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:48:07,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:48:07,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 13:48:07,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:07,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:13,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693142171] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:48:13,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1283946010] [2022-12-14 13:48:13,914 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 13:48:13,914 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:48:13,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:48:13,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:48:13,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:48:13,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:13,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:13,940 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:48:13,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 13:48:13,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:13,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:13,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 13:48:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:13,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:48:13,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 13:48:13,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:13,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:13,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2022-12-14 13:48:14,035 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 13:48:14,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 294 treesize of output 281 [2022-12-14 13:48:14,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:48:14,105 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:48:14,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 13:48:14,112 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:48:14,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2386#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:48:14,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:48:14,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:48:14,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-12-14 13:48:14,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287200349] [2022-12-14 13:48:14,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:48:14,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-14 13:48:14,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:14,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-14 13:48:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2022-12-14 13:48:14,307 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:14,585 INFO L93 Difference]: Finished difference Result 198 states and 293 transitions. [2022-12-14 13:48:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-14 13:48:14,586 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 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 98 [2022-12-14 13:48:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:14,587 INFO L225 Difference]: With dead ends: 198 [2022-12-14 13:48:14,587 INFO L226 Difference]: Without dead ends: 195 [2022-12-14 13:48:14,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2022-12-14 13:48:14,590 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:14,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-12-14 13:48:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-12-14 13:48:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2022-12-14 13:48:14,605 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2022-12-14 13:48:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:14,605 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2022-12-14 13:48:14,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:14,606 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2022-12-14 13:48:14,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-12-14 13:48:14,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:14,607 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1] [2022-12-14 13:48:14,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:48:14,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:14,809 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:14,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:14,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1544332582, now seen corresponding path program 7 times [2022-12-14 13:48:14,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:14,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697274811] [2022-12-14 13:48:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:14,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:28,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:28,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697274811] [2022-12-14 13:48:28,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697274811] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:28,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599914709] [2022-12-14 13:48:28,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:48:28,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:28,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:28,519 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:28,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:48:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:28,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-14 13:48:28,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:28,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:54,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599914709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:48:54,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437226795] [2022-12-14 13:48:54,450 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 13:48:54,450 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:48:54,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:48:54,450 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:48:54,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:48:54,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:54,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:54,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:48:54,466 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 13:48:54,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 13:48:54,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:54,494 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:48:54,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 13:48:54,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:54,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:54,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 13:48:54,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:54,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:54,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2022-12-14 13:48:54,560 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-12-14 13:48:54,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 281 treesize of output 268 [2022-12-14 13:48:54,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:48:54,618 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:48:54,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 13:48:54,625 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:48:54,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4707#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:48:54,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:48:54,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:48:54,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-12-14 13:48:54,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728665886] [2022-12-14 13:48:54,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:48:54,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-14 13:48:54,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:55,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-14 13:48:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2022-12-14 13:48:55,012 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:56,604 INFO L93 Difference]: Finished difference Result 390 states and 581 transitions. [2022-12-14 13:48:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-12-14 13:48:56,605 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 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 194 [2022-12-14 13:48:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:56,606 INFO L225 Difference]: With dead ends: 390 [2022-12-14 13:48:56,606 INFO L226 Difference]: Without dead ends: 387 [2022-12-14 13:48:56,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2022-12-14 13:48:56,613 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:56,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:48:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-12-14 13:48:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-12-14 13:48:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2022-12-14 13:48:56,629 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2022-12-14 13:48:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:56,629 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2022-12-14 13:48:56,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2022-12-14 13:48:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-12-14 13:48:56,633 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:56,634 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1] [2022-12-14 13:48:56,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:48:56,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:56,835 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:56,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:56,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1191628506, now seen corresponding path program 8 times [2022-12-14 13:48:56,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:56,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291843206] [2022-12-14 13:48:56,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:56,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:49:58,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:58,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291843206] [2022-12-14 13:49:58,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291843206] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:49:58,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125286567] [2022-12-14 13:49:58,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:49:58,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:49:58,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:49:58,014 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:49:58,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0aa4f34-3d0f-46ed-b8a1-0ef1d72d3dc6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process