./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/copysome2-2.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_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/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_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/copysome2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/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_0da395ec-866b-4062-b961-688df371abd4/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 498a9d01a4c9c1e07ef15169be61a1aa89cf7662222e03da034e67869e2f7c71 --- 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 14:27:49,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:27:49,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:27:49,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:27:49,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:27:49,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:27:49,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:27:49,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:27:49,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:27:49,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:27:49,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:27:49,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:27:49,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:27:49,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:27:49,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:27:49,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:27:49,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:27:49,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:27:49,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:27:49,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:27:49,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:27:49,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:27:49,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:27:49,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:27:49,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:27:49,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:27:49,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:27:49,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:27:49,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:27:49,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:27:49,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:27:49,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:27:49,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:27:49,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:27:49,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:27:49,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:27:49,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:27:49,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:27:49,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:27:49,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:27:49,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:27:49,781 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:27:49,803 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:27:49,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:27:49,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:27:49,804 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:27:49,804 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:27:49,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:27:49,805 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:27:49,805 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:27:49,805 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:27:49,805 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:27:49,805 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:27:49,806 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:27:49,806 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:27:49,806 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:27:49,806 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:27:49,806 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:27:49,807 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:27:49,807 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:27:49,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:27:49,808 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:27:49,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:27:49,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:27:49,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:27:49,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:27:49,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:27:49,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:27:49,809 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:27:49,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:27:49,809 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:27:49,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:27:49,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:27:49,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:27:49,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:27:49,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:27:49,810 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:27:49,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:27:49,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:27:49,811 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:27:49,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:27:49,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:27:49,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:27:49,811 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_0da395ec-866b-4062-b961-688df371abd4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 498a9d01a4c9c1e07ef15169be61a1aa89cf7662222e03da034e67869e2f7c71 [2022-12-14 14:27:49,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:27:50,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:27:50,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:27:50,021 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:27:50,022 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:27:50,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-programs/copysome2-2.i [2022-12-14 14:27:52,586 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:27:52,704 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:27:52,704 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/sv-benchmarks/c/array-programs/copysome2-2.i [2022-12-14 14:27:52,709 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/data/296253b67/c5ea723a5d0f48b086619589f13e7ee8/FLAG45c6d01be [2022-12-14 14:27:52,719 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/data/296253b67/c5ea723a5d0f48b086619589f13e7ee8 [2022-12-14 14:27:52,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:27:52,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:27:52,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:27:52,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:27:52,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:27:52,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19feeabe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52, skipping insertion in model container [2022-12-14 14:27:52,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:27:52,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:27:52,843 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_0da395ec-866b-4062-b961-688df371abd4/sv-benchmarks/c/array-programs/copysome2-2.i[804,817] [2022-12-14 14:27:52,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:27:52,862 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:27:52,870 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_0da395ec-866b-4062-b961-688df371abd4/sv-benchmarks/c/array-programs/copysome2-2.i[804,817] [2022-12-14 14:27:52,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:27:52,886 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:27:52,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52 WrapperNode [2022-12-14 14:27:52,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:27:52,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:27:52,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:27:52,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:27:52,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,913 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2022-12-14 14:27:52,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:27:52,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:27:52,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:27:52,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:27:52,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,930 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:27:52,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:27:52,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:27:52,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:27:52,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52" (1/1) ... [2022-12-14 14:27:52,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:27:52,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:27:52,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:27:52,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:27:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:27:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:27:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 14:27:52,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 14:27:52,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:27:52,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:27:52,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 14:27:52,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 14:27:53,060 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:27:53,062 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:27:53,193 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:27:53,248 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:27:53,248 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 14:27:53,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:27:53 BoogieIcfgContainer [2022-12-14 14:27:53,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:27:53,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:27:53,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:27:53,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:27:53,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:27:52" (1/3) ... [2022-12-14 14:27:53,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e1261f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:27:53, skipping insertion in model container [2022-12-14 14:27:53,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:27:52" (2/3) ... [2022-12-14 14:27:53,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e1261f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:27:53, skipping insertion in model container [2022-12-14 14:27:53,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:27:53" (3/3) ... [2022-12-14 14:27:53,260 INFO L112 eAbstractionObserver]: Analyzing ICFG copysome2-2.i [2022-12-14 14:27:53,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:27:53,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:27:53,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:27:53,326 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;@19c8b911, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:27:53,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:27:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:27:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 14:27:53,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:27:53,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:27:53,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:27:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:27:53,339 INFO L85 PathProgramCache]: Analyzing trace with hash 904902092, now seen corresponding path program 1 times [2022-12-14 14:27:53,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:27:53,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498923303] [2022-12-14 14:27:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:27:53,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:27:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:27:53,504 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 14:27:53,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:27:53,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498923303] [2022-12-14 14:27:53,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498923303] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:27:53,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:27:53,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:27:53,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912512154] [2022-12-14 14:27:53,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:27:53,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:27:53,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:27:53,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:27:53,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:27:53,544 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:27:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:27:53,584 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-12-14 14:27:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:27:53,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 14:27:53,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:27:53,592 INFO L225 Difference]: With dead ends: 21 [2022-12-14 14:27:53,592 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 14:27:53,594 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 14:27:53,597 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:27:53,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:27:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 14:27:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 14:27:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 14:27:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-12-14 14:27:53,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2022-12-14 14:27:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:27:53,622 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-12-14 14:27:53,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:27:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-12-14 14:27:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 14:27:53,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:27:53,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:27:53,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:27:53,624 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:27:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:27:53,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1842715167, now seen corresponding path program 1 times [2022-12-14 14:27:53,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:27:53,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276408413] [2022-12-14 14:27:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:27:53,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:27:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:27:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:27:53,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:27:53,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276408413] [2022-12-14 14:27:53,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276408413] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:27:53,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556287757] [2022-12-14 14:27:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:27:53,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:27:53,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:27:53,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:27:53,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:27:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:27:53,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:27:53,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:27:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:27:53,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:27:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:27:53,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556287757] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:27:53,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650785576] [2022-12-14 14:27:53,871 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 14:27:53,871 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:27:53,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:27:53,881 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:27:53,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:27:53,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:53,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:54,055 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 14:27:54,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 14:27:54,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:54,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:54,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-12-14 14:27:54,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:54,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:54,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:54,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-12-14 14:27:54,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:54,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:54,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:54,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:54,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:54,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:54,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:54,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:54,442 INFO L321 Elim1Store]: treesize reduction 585, result has 10.8 percent of original size [2022-12-14 14:27:54,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 422 treesize of output 377 [2022-12-14 14:27:55,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:55,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:55,125 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-12-14 14:27:55,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 48 [2022-12-14 14:27:55,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:55,164 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:27:55,164 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 25 treesize of output 25 [2022-12-14 14:27:55,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:55,205 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:27:55,206 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 25 treesize of output 25 [2022-12-14 14:27:55,241 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:27:55,241 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 15 treesize of output 15 [2022-12-14 14:27:55,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:55,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:55,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:55,438 INFO L321 Elim1Store]: treesize reduction 231, result has 34.6 percent of original size [2022-12-14 14:27:55,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 127 treesize of output 228 [2022-12-14 14:27:55,684 INFO L321 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2022-12-14 14:27:55,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1161 treesize of output 1119 [2022-12-14 14:27:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:55,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1096 treesize of output 1029 [2022-12-14 14:27:56,085 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:56,675 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 14:27:56,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 14:27:56,697 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:56,891 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:56,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:56,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-12-14 14:27:56,932 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:56,952 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:56,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:56,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2022-12-14 14:27:57,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:57,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-12-14 14:27:57,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2022-12-14 14:27:57,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-12-14 14:27:57,220 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:57,234 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:57,310 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:57,327 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:57,340 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:57,728 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:57,737 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:57,747 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:57,760 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:57,768 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:57,775 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:58,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:58,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 54 [2022-12-14 14:27:58,346 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:58,365 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:58,390 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:58,401 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:58,421 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:27:58,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2022-12-14 14:27:58,489 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:58,506 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:58,538 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:58,566 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:27:59,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:59,779 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:27:59,780 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 25 treesize of output 25 [2022-12-14 14:27:59,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:27:59,797 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:27:59,798 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 25 treesize of output 25 [2022-12-14 14:27:59,811 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:27:59,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '127#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 14:27:59,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:27:59,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:27:59,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 14:27:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937483703] [2022-12-14 14:27:59,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:27:59,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:27:59,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:27:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:27:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:27:59,952 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 14:27:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:27:59,996 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2022-12-14 14:27:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:27:59,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 14:27:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:27:59,997 INFO L225 Difference]: With dead ends: 30 [2022-12-14 14:27:59,997 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 14:27:59,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:27:59,999 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:28:00,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:28:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 14:28:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 14:28:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 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 14:28:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-12-14 14:28:00,002 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2022-12-14 14:28:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:28:00,002 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-12-14 14:28:00,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 14:28:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-12-14 14:28:00,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 14:28:00,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:28:00,003 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:28:00,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:28:00,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:00,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:28:00,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:28:00,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1262196212, now seen corresponding path program 2 times [2022-12-14 14:28:00,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:28:00,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284536768] [2022-12-14 14:28:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:00,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:28:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 14:28:00,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:28:00,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284536768] [2022-12-14 14:28:00,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284536768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:28:00,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528829032] [2022-12-14 14:28:00,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:28:00,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:00,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:28:00,396 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:28:00,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:28:00,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:28:00,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:28:00,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:28:00,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:28:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 14:28:00,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:28:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 14:28:00,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528829032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:28:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1785411387] [2022-12-14 14:28:00,569 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 14:28:00,569 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:28:00,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:28:00,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:28:00,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:28:00,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:00,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:00,629 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-12-14 14:28:00,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-12-14 14:28:00,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:00,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:00,695 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 14:28:00,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 14:28:00,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:00,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:00,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:00,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-12-14 14:28:00,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:00,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:00,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:00,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:00,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:00,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:00,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:00,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:00,944 INFO L321 Elim1Store]: treesize reduction 585, result has 10.8 percent of original size [2022-12-14 14:28:00,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 422 treesize of output 377 [2022-12-14 14:28:01,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,471 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-12-14 14:28:01,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 48 [2022-12-14 14:28:01,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,497 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:28:01,497 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 25 treesize of output 25 [2022-12-14 14:28:01,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,523 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:28:01,524 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 25 treesize of output 25 [2022-12-14 14:28:01,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,555 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:28:01,555 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 25 treesize of output 25 [2022-12-14 14:28:01,559 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:28:01,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:01,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,615 INFO L321 Elim1Store]: treesize reduction 116, result has 22.1 percent of original size [2022-12-14 14:28:01,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 143 treesize of output 193 [2022-12-14 14:28:01,733 INFO L321 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2022-12-14 14:28:01,733 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 170 treesize of output 184 [2022-12-14 14:28:01,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:01,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 122 [2022-12-14 14:28:01,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:01,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:01,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 110 [2022-12-14 14:28:01,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,832 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:28:01,832 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 25 treesize of output 25 [2022-12-14 14:28:01,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:01,846 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:28:01,846 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 25 treesize of output 25 [2022-12-14 14:28:01,856 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:28:01,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '340#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 14:28:01,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:28:01,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:28:01,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 14:28:01,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651950099] [2022-12-14 14:28:01,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:28:01,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 14:28:01,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:28:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 14:28:01,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-12-14 14:28:01,995 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:28:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:28:02,069 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-12-14 14:28:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 14:28:02,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 14:28:02,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:28:02,070 INFO L225 Difference]: With dead ends: 54 [2022-12-14 14:28:02,070 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 14:28:02,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-12-14 14:28:02,071 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:28:02,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:28:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 14:28:02,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-14 14:28:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 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 14:28:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-12-14 14:28:02,077 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 19 [2022-12-14 14:28:02,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:28:02,077 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-12-14 14:28:02,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:28:02,077 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-12-14 14:28:02,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 14:28:02,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:28:02,078 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:28:02,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:28:02,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:02,280 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:28:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:28:02,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1863011220, now seen corresponding path program 3 times [2022-12-14 14:28:02,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:28:02,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679158445] [2022-12-14 14:28:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:28:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 14:28:02,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:28:02,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679158445] [2022-12-14 14:28:02,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679158445] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:28:02,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050949563] [2022-12-14 14:28:02,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:28:02,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:02,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:28:02,713 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:28:02,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:28:02,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:28:02,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:28:02,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 14:28:02,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:28:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 14:28:02,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:28:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 14:28:02,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050949563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:28:02,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1835783280] [2022-12-14 14:28:02,986 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 14:28:02,986 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:28:02,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:28:02,986 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:28:02,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:28:02,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,038 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-12-14 14:28:03,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-12-14 14:28:03,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,095 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 14:28:03,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 14:28:03,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 57 [2022-12-14 14:28:03,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,239 INFO L321 Elim1Store]: treesize reduction 264, result has 10.8 percent of original size [2022-12-14 14:28:03,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 452 treesize of output 374 [2022-12-14 14:28:03,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,320 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-12-14 14:28:03,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 48 [2022-12-14 14:28:03,344 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:28:03,344 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 15 treesize of output 15 [2022-12-14 14:28:03,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,404 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 14:28:03,404 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 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 14:28:03,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,441 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:28:03,441 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 25 treesize of output 25 [2022-12-14 14:28:03,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,456 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:28:03,457 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 25 treesize of output 25 [2022-12-14 14:28:03,460 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:28:03,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,510 INFO L321 Elim1Store]: treesize reduction 112, result has 24.8 percent of original size [2022-12-14 14:28:03,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 143 treesize of output 197 [2022-12-14 14:28:03,570 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-12-14 14:28:03,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 174 treesize of output 171 [2022-12-14 14:28:03,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:03,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 109 [2022-12-14 14:28:03,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 109 [2022-12-14 14:28:03,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,681 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:28:03,681 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 25 treesize of output 25 [2022-12-14 14:28:03,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:03,692 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:28:03,692 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 25 treesize of output 25 [2022-12-14 14:28:03,701 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:28:03,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '757#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 14:28:03,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:28:03,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:28:03,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 14:28:03,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342593354] [2022-12-14 14:28:03,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:28:03,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 14:28:03,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:28:03,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 14:28:03,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-12-14 14:28:03,797 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 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 14:28:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:28:03,947 INFO L93 Difference]: Finished difference Result 102 states and 143 transitions. [2022-12-14 14:28:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 14:28:03,947 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 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 37 [2022-12-14 14:28:03,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:28:03,948 INFO L225 Difference]: With dead ends: 102 [2022-12-14 14:28:03,948 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 14:28:03,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-12-14 14:28:03,950 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:28:03,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:28:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 14:28:03,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-12-14 14:28:03,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 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 14:28:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-12-14 14:28:03,957 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 37 [2022-12-14 14:28:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:28:03,958 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-12-14 14:28:03,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 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 14:28:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-12-14 14:28:03,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 14:28:03,959 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:28:03,959 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:28:03,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:28:04,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:04,160 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:28:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:28:04,161 INFO L85 PathProgramCache]: Analyzing trace with hash -60677844, now seen corresponding path program 4 times [2022-12-14 14:28:04,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:28:04,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158710482] [2022-12-14 14:28:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:04,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:28:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-12-14 14:28:05,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:28:05,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158710482] [2022-12-14 14:28:05,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158710482] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:28:05,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671413370] [2022-12-14 14:28:05,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:28:05,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:28:05,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:28:05,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:28:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:05,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 14:28:05,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:28:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-12-14 14:28:05,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:28:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-12-14 14:28:05,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671413370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:28:05,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [137216195] [2022-12-14 14:28:05,800 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 14:28:05,800 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:28:05,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:28:05,800 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:28:05,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:28:05,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,845 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-12-14 14:28:05,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-12-14 14:28:05,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,900 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 14:28:05,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 14:28:05,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 57 [2022-12-14 14:28:05,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:05,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:05,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:05,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:05,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:06,035 INFO L321 Elim1Store]: treesize reduction 264, result has 10.8 percent of original size [2022-12-14 14:28:06,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 452 treesize of output 374 [2022-12-14 14:28:06,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:06,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:06,115 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-12-14 14:28:06,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 48 [2022-12-14 14:28:06,137 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:28:06,137 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 15 treesize of output 15 [2022-12-14 14:28:06,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:06,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:06,210 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 14:28:06,210 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 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 14:28:06,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:06,276 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:28:06,277 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 25 treesize of output 25 [2022-12-14 14:28:06,292 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 14:28:06,293 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 15 treesize of output 15 [2022-12-14 14:28:06,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:06,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:06,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:06,377 INFO L321 Elim1Store]: treesize reduction 261, result has 26.1 percent of original size [2022-12-14 14:28:06,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 127 treesize of output 198 [2022-12-14 14:28:06,466 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-12-14 14:28:06,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 343 treesize of output 338 [2022-12-14 14:28:06,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:28:06,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 298 [2022-12-14 14:28:06,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:06,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:28:06,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:06,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 602 treesize of output 546 [2022-12-14 14:28:07,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:07,263 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:28:07,264 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 25 treesize of output 25 [2022-12-14 14:28:07,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:28:07,276 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 14:28:07,276 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 25 treesize of output 25 [2022-12-14 14:28:07,286 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:28:07,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1582#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 14:28:07,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:28:07,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:28:07,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-14 14:28:07,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859197919] [2022-12-14 14:28:07,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:28:07,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 14:28:07,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:28:07,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 14:28:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 14:28:07,450 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 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 14:28:07,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:28:07,754 INFO L93 Difference]: Finished difference Result 198 states and 275 transitions. [2022-12-14 14:28:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 14:28:07,754 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 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 73 [2022-12-14 14:28:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:28:07,755 INFO L225 Difference]: With dead ends: 198 [2022-12-14 14:28:07,755 INFO L226 Difference]: Without dead ends: 147 [2022-12-14 14:28:07,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 14:28:07,756 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:28:07,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:28:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-14 14:28:07,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-12-14 14:28:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 0 states have call successors, (0), 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 14:28:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-12-14 14:28:07,764 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 73 [2022-12-14 14:28:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:28:07,764 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-12-14 14:28:07,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 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 14:28:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-12-14 14:28:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 14:28:07,766 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:28:07,766 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:28:07,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:28:07,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:07,968 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:28:07,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:28:07,968 INFO L85 PathProgramCache]: Analyzing trace with hash -186099028, now seen corresponding path program 5 times [2022-12-14 14:28:07,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:28:07,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882370668] [2022-12-14 14:28:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:28:07,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:28:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:28:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-12-14 14:28:10,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:28:10,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882370668] [2022-12-14 14:28:10,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882370668] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:28:10,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925676507] [2022-12-14 14:28:10,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:28:10,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:28:10,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:28:10,557 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:28:10,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da395ec-866b-4062-b961-688df371abd4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process