./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba --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 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 --- 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-b5237d8 [2022-11-22 02:42:50,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:42:50,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:42:50,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:42:50,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:42:50,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:42:50,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:42:50,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:42:50,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:42:50,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:42:50,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:42:50,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:42:50,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:42:50,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:42:50,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:42:50,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:42:50,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:42:50,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:42:50,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:42:50,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:42:50,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:42:50,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:42:50,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:42:50,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:42:50,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:42:50,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:42:50,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:42:50,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:42:50,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:42:50,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:42:50,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:42:50,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:42:50,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:42:50,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:42:50,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:42:50,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:42:50,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:42:50,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:42:50,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:42:50,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:42:50,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:42:50,787 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:42:50,825 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:42:50,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:42:50,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:42:50,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:42:50,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:42:50,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:42:50,828 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:42:50,829 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:42:50,829 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:42:50,829 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:42:50,830 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:42:50,831 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:42:50,831 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:42:50,831 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:42:50,831 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:42:50,832 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:42:50,832 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:42:50,832 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:42:50,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:42:50,833 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:42:50,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:42:50,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:42:50,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:42:50,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:42:50,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:42:50,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:42:50,835 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:42:50,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:42:50,836 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:42:50,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:42:50,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:42:50,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:42:50,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:42:50,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:42:50,838 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:42:50,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:42:50,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:42:50,839 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:42:50,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:42:50,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:42:50,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:42:50,840 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_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 [2022-11-22 02:42:51,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:42:51,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:42:51,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:42:51,243 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:42:51,252 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:42:51,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2022-11-22 02:42:54,317 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:42:54,548 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:42:54,548 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2022-11-22 02:42:54,556 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/data/b7f3d0499/af43ca4bb6e04c90801f751569b4fc20/FLAG3e625a376 [2022-11-22 02:42:54,577 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/data/b7f3d0499/af43ca4bb6e04c90801f751569b4fc20 [2022-11-22 02:42:54,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:42:54,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:42:54,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:42:54,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:42:54,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:42:54,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3521ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54, skipping insertion in model container [2022-11-22 02:42:54,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:42:54,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:42:54,774 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_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2022-11-22 02:42:54,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:42:54,803 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:42:54,818 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_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2022-11-22 02:42:54,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:42:54,841 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:42:54,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54 WrapperNode [2022-11-22 02:42:54,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:42:54,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:42:54,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:42:54,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:42:54,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,896 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2022-11-22 02:42:54,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:42:54,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:42:54,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:42:54,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:42:54,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,945 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:42:54,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:42:54,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:42:54,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:42:54,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54" (1/1) ... [2022-11-22 02:42:54,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:42:54,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:55,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:42:55,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:42:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:42:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 02:42:55,082 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 02:42:55,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:42:55,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:42:55,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:42:55,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:42:55,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:42:55,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:42:55,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:42:55,179 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:42:55,182 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:42:55,403 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:42:55,457 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:42:55,457 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 02:42:55,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:42:55 BoogieIcfgContainer [2022-11-22 02:42:55,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:42:55,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:42:55,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:42:55,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:42:55,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:42:54" (1/3) ... [2022-11-22 02:42:55,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496f2a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:42:55, skipping insertion in model container [2022-11-22 02:42:55,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:54" (2/3) ... [2022-11-22 02:42:55,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496f2a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:42:55, skipping insertion in model container [2022-11-22 02:42:55,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:42:55" (3/3) ... [2022-11-22 02:42:55,470 INFO L112 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2022-11-22 02:42:55,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:42:55,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:42:55,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:42:55,643 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;@5d0dd9be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:42:55,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:42:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:42:55,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:42:55,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:55,661 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:55,662 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:55,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1625058095, now seen corresponding path program 1 times [2022-11-22 02:42:55,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:55,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071335702] [2022-11-22 02:42:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:55,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:55,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:42:55,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344310036] [2022-11-22 02:42:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:55,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:55,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:55,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:55,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:42:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:55,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:42:55,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:42:56,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:42:56,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:56,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071335702] [2022-11-22 02:42:56,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:42:56,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344310036] [2022-11-22 02:42:56,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344310036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:56,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:42:56,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:42:56,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855583131] [2022-11-22 02:42:56,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:56,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:42:56,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:56,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:42:56,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:42:56,102 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:42:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:56,192 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2022-11-22 02:42:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:42:56,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2022-11-22 02:42:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:56,202 INFO L225 Difference]: With dead ends: 32 [2022-11-22 02:42:56,203 INFO L226 Difference]: Without dead ends: 21 [2022-11-22 02:42:56,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:42:56,209 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:56,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:42:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-22 02:42:56,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2022-11-22 02:42:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:42:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-11-22 02:42:56,246 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 12 [2022-11-22 02:42:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:56,248 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-11-22 02:42:56,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:42:56,249 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-11-22 02:42:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:42:56,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:56,250 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:56,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 02:42:56,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 02:42:56,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:56,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1966088254, now seen corresponding path program 1 times [2022-11-22 02:42:56,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:56,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674641042] [2022-11-22 02:42:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:56,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:56,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:42:56,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241893380] [2022-11-22 02:42:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:56,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:56,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:56,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:56,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:42:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:56,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:42:56,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:42:56,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:42:56,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:56,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674641042] [2022-11-22 02:42:56,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:42:56,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241893380] [2022-11-22 02:42:56,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241893380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:56,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:42:56,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:42:56,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777187983] [2022-11-22 02:42:56,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:56,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:42:56,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:42:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:42:56,677 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:42:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:56,788 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2022-11-22 02:42:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:42:56,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-22 02:42:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:56,790 INFO L225 Difference]: With dead ends: 35 [2022-11-22 02:42:56,790 INFO L226 Difference]: Without dead ends: 21 [2022-11-22 02:42:56,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:42:56,792 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:56,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:42:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-22 02:42:56,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2022-11-22 02:42:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:42:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-22 02:42:56,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2022-11-22 02:42:56,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:56,799 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-22 02:42:56,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:42:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-22 02:42:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:42:56,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:56,801 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:56,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:57,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:57,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:57,008 INFO L85 PathProgramCache]: Analyzing trace with hash -268377018, now seen corresponding path program 1 times [2022-11-22 02:42:57,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:57,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900635805] [2022-11-22 02:42:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:57,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:57,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:42:57,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965595163] [2022-11-22 02:42:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:57,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:57,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:57,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:57,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:42:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:57,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 02:42:57,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:57,244 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:42:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:42:57,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:57,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 25 [2022-11-22 02:42:57,754 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 41 treesize of output 39 [2022-11-22 02:42:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:42:58,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:58,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900635805] [2022-11-22 02:42:58,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:42:58,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965595163] [2022-11-22 02:42:58,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965595163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:58,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782359110] [2022-11-22 02:42:58,105 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 02:42:58,106 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:58,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:58,123 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:58,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:58,244 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-22 02:42:58,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-22 02:42:58,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:58,309 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:42:58,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:42:58,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:58,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-11-22 02:42:58,926 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 0 case distinctions, treesize of input 25 treesize of output 22 [2022-11-22 02:42:59,251 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-11-22 02:42:59,311 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:43:01,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '365#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_#t~mem7#1| 4294967296) (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~s~0#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-22 02:43:01,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:43:01,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:43:01,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2022-11-22 02:43:01,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162446251] [2022-11-22 02:43:01,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:43:01,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 02:43:01,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:01,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 02:43:01,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-11-22 02:43:01,496 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 19 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:43:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:02,701 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-11-22 02:43:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-22 02:43:02,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 15 [2022-11-22 02:43:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:02,703 INFO L225 Difference]: With dead ends: 75 [2022-11-22 02:43:02,704 INFO L226 Difference]: Without dead ends: 73 [2022-11-22 02:43:02,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=475, Invalid=2177, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 02:43:02,706 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 225 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:02,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 64 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:43:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-22 02:43:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 22. [2022-11-22 02:43:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:43:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-22 02:43:02,722 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 15 [2022-11-22 02:43:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:02,722 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-22 02:43:02,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:43:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-22 02:43:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 02:43:02,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:02,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:02,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:43:02,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:02,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:02,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2014206027, now seen corresponding path program 1 times [2022-11-22 02:43:02,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:02,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14799979] [2022-11-22 02:43:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:02,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:02,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:43:02,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836275589] [2022-11-22 02:43:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:02,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:02,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:02,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:02,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:43:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:03,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:43:03,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:43:03,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:43:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:43:03,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:03,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14799979] [2022-11-22 02:43:03,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:43:03,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836275589] [2022-11-22 02:43:03,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836275589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:43:03,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1198240678] [2022-11-22 02:43:03,138 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 02:43:03,138 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:43:03,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:43:03,139 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:43:03,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:43:03,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:03,210 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:43:03,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:43:03,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:03,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-22 02:43:03,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:03,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2022-11-22 02:43:03,581 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 0 case distinctions, treesize of input 25 treesize of output 22 [2022-11-22 02:43:03,993 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-11-22 02:43:04,034 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:43:05,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '690#(and (<= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 1500 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1500) (<= 0 |ULTIMATE.start_main_~#A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~q~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:43:05,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:43:05,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:43:05,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-22 02:43:05,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206276898] [2022-11-22 02:43:05,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:43:05,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:43:05,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:05,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:43:05,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:43:05,569 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:43:05,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:05,719 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2022-11-22 02:43:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:43:05,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-11-22 02:43:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:05,723 INFO L225 Difference]: With dead ends: 61 [2022-11-22 02:43:05,723 INFO L226 Difference]: Without dead ends: 51 [2022-11-22 02:43:05,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:43:05,728 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:05,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 50 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:43:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-22 02:43:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-11-22 02:43:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:43:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-11-22 02:43:05,764 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 18 [2022-11-22 02:43:05,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:05,765 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-11-22 02:43:05,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:43:05,765 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-11-22 02:43:05,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 02:43:05,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:05,766 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:05,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 02:43:05,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:05,972 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:05,972 INFO L85 PathProgramCache]: Analyzing trace with hash 975332529, now seen corresponding path program 2 times [2022-11-22 02:43:05,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:05,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94207195] [2022-11-22 02:43:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:05,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:05,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:43:05,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226635472] [2022-11-22 02:43:05,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:43:05,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:05,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:05,989 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:06,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:43:06,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:43:06,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:43:06,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-22 02:43:06,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:06,160 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 02:43:06,226 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2022-11-22 02:43:06,227 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 34 treesize of output 51 [2022-11-22 02:43:06,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:43:06,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 91 treesize of output 78 [2022-11-22 02:43:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:43:06,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:43:08,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 45 treesize of output 43 [2022-11-22 02:43:08,528 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 244 treesize of output 240 [2022-11-22 02:43:23,438 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:43:23,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:23,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94207195] [2022-11-22 02:43:23,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:43:23,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226635472] [2022-11-22 02:43:23,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226635472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:43:23,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1142578685] [2022-11-22 02:43:23,560 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 02:43:23,560 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:43:23,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:43:23,561 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:43:23,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:43:23,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:23,608 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-22 02:43:23,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-22 02:43:23,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:23,656 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:43:23,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:43:23,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:23,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2022-11-22 02:43:23,934 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 0 case distinctions, treesize of input 25 treesize of output 22 [2022-11-22 02:43:24,056 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-11-22 02:43:24,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:43:26,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '985#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_#t~mem7#1| 4294967296) (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~s~0#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-22 02:43:26,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:43:26,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:43:26,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-22 02:43:26,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907200585] [2022-11-22 02:43:26,136 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-22 02:43:26,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:43:26,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:26,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:43:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=669, Unknown=2, NotChecked=0, Total=812 [2022-11-22 02:43:26,138 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:43:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:28,380 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2022-11-22 02:43:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:43:28,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-11-22 02:43:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:28,383 INFO L225 Difference]: With dead ends: 85 [2022-11-22 02:43:28,383 INFO L226 Difference]: Without dead ends: 83 [2022-11-22 02:43:28,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=305, Invalid=1253, Unknown=2, NotChecked=0, Total=1560 [2022-11-22 02:43:28,385 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 90 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:28,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 40 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:43:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-22 02:43:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 44. [2022-11-22 02:43:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:43:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2022-11-22 02:43:28,413 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 18 [2022-11-22 02:43:28,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:28,413 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2022-11-22 02:43:28,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:43:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2022-11-22 02:43:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 02:43:28,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:28,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:28,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:43:28,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:28,622 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:28,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash -716318637, now seen corresponding path program 2 times [2022-11-22 02:43:28,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:28,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244965356] [2022-11-22 02:43:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:28,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:28,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:43:28,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766728033] [2022-11-22 02:43:28,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:43:28,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:28,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:28,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:28,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:43:28,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:43:28,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:43:28,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 02:43:28,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:28,817 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:43:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:43:28,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:43:29,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 30 treesize of output 28 [2022-11-22 02:43:29,219 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 44 treesize of output 40 [2022-11-22 02:43:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:43:30,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:30,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244965356] [2022-11-22 02:43:30,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:43:30,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766728033] [2022-11-22 02:43:30,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766728033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:43:30,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [835279783] [2022-11-22 02:43:30,116 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 02:43:30,116 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:43:30,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:43:30,117 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:43:30,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:43:30,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:30,172 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:43:30,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:43:30,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:30,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-22 02:43:30,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:30,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2022-11-22 02:43:30,491 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 0 case distinctions, treesize of input 25 treesize of output 22 [2022-11-22 02:43:30,792 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-11-22 02:43:30,830 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:43:32,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1371#(and (<= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 1500 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1500) (<= 0 |ULTIMATE.start_main_~#A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~q~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:43:32,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:43:32,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:43:32,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2022-11-22 02:43:32,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947662997] [2022-11-22 02:43:32,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:43:32,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 02:43:32,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 02:43:32,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:43:32,538 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 23 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:43:34,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:34,834 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2022-11-22 02:43:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-22 02:43:34,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2022-11-22 02:43:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:34,836 INFO L225 Difference]: With dead ends: 110 [2022-11-22 02:43:34,836 INFO L226 Difference]: Without dead ends: 108 [2022-11-22 02:43:34,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=429, Invalid=2541, Unknown=0, NotChecked=0, Total=2970 [2022-11-22 02:43:34,838 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:34,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 193 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:43:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-22 02:43:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 47. [2022-11-22 02:43:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:43:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2022-11-22 02:43:34,872 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 19 [2022-11-22 02:43:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:34,872 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2022-11-22 02:43:34,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:43:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2022-11-22 02:43:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 02:43:34,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:34,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:34,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:43:35,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 02:43:35,080 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:35,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:35,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1342601893, now seen corresponding path program 1 times [2022-11-22 02:43:35,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:35,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944924570] [2022-11-22 02:43:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:35,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:35,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:43:35,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346384267] [2022-11-22 02:43:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:35,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:35,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:35,092 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:35,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:43:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:35,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:43:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:43:35,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:43:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:43:35,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:35,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944924570] [2022-11-22 02:43:35,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:43:35,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346384267] [2022-11-22 02:43:35,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346384267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:43:35,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1449069001] [2022-11-22 02:43:35,266 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 02:43:35,266 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:43:35,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:43:35,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:43:35,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:43:35,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:35,321 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-22 02:43:35,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-22 02:43:35,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:35,363 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:43:35,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:43:35,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:35,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-11-22 02:43:35,631 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 0 case distinctions, treesize of input 25 treesize of output 22 [2022-11-22 02:43:36,264 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-11-22 02:43:36,301 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:43:38,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1815#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (or (and (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~q~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0)) (and (= |ULTIMATE.start_main_~m~0#1| 1000) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))) (= (ite (= (mod |ULTIMATE.start_main_#t~mem7#1| 4294967296) (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~s~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|))' at error location [2022-11-22 02:43:38,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:43:38,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:43:38,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-22 02:43:38,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352719483] [2022-11-22 02:43:38,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:43:38,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:43:38,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:38,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:43:38,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:43:38,156 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:43:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:38,314 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2022-11-22 02:43:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:43:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-22 02:43:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:38,315 INFO L225 Difference]: With dead ends: 105 [2022-11-22 02:43:38,315 INFO L226 Difference]: Without dead ends: 83 [2022-11-22 02:43:38,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:43:38,317 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:38,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:43:38,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-22 02:43:38,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 50. [2022-11-22 02:43:38,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.326086956521739) internal successors, (61), 46 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:43:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2022-11-22 02:43:38,352 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 20 [2022-11-22 02:43:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:38,352 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2022-11-22 02:43:38,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:43:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2022-11-22 02:43:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 02:43:38,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:38,354 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:38,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:43:38,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:43:38,563 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:38,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:38,563 INFO L85 PathProgramCache]: Analyzing trace with hash 336047915, now seen corresponding path program 3 times [2022-11-22 02:43:38,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:38,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612184832] [2022-11-22 02:43:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:38,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:38,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:43:38,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472496422] [2022-11-22 02:43:38,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:43:38,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:38,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:38,572 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:38,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:43:38,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:43:38,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:43:38,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-22 02:43:38,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:38,741 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 0 case distinctions, treesize of input 25 treesize of output 22 [2022-11-22 02:43:38,785 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 0 case distinctions, treesize of input 34 treesize of output 33 [2022-11-22 02:43:38,893 INFO L321 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2022-11-22 02:43:38,893 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 39 treesize of output 38 [2022-11-22 02:43:38,961 INFO L321 Elim1Store]: treesize reduction 62, result has 23.5 percent of original size [2022-11-22 02:43:38,961 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 3 case distinctions, treesize of input 39 treesize of output 41 [2022-11-22 02:43:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:43:39,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:43:40,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 71 treesize of output 69 [2022-11-22 02:43:40,295 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 539 treesize of output 537 [2022-11-22 02:43:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:43:42,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:42,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612184832] [2022-11-22 02:43:42,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:43:42,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472496422] [2022-11-22 02:43:42,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472496422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:43:42,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2111841846] [2022-11-22 02:43:42,572 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 02:43:42,572 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:43:42,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:43:42,573 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:43:42,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:43:42,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:42,621 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-22 02:43:42,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-22 02:43:42,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:42,673 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:43:42,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:43:42,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:42,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-11-22 02:43:42,929 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 0 case distinctions, treesize of input 25 treesize of output 22 [2022-11-22 02:43:43,119 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-11-22 02:43:43,159 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:43:45,140 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2241#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_#t~mem7#1| 4294967296) (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~s~0#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-22 02:43:45,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:43:45,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:43:45,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-11-22 02:43:45,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684845368] [2022-11-22 02:43:45,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:43:45,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 02:43:45,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:45,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 02:43:45,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:43:45,142 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 27 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:43:47,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:44:10,301 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:44:21,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:44:23,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:44:47,540 WARN L233 SmtUtils]: Spent 8.46s on a formula simplification. DAG size of input: 54 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:44:49,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:44:51,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:45:04,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:45:22,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:46:02,040 WARN L233 SmtUtils]: Spent 6.67s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:46:04,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:46:06,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:46:08,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:46:57,741 WARN L233 SmtUtils]: Spent 38.45s on a formula simplification. DAG size of input: 71 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:46:59,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:47:01,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:47:06,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:47:08,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:47:30,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:47:32,072 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_ULTIMATE.start_main_~n~0#1| 4))) (let ((.cse7 (* .cse6 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse4 (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse7)) (.cse3 (+ |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse7 (* |c_ULTIMATE.start_main_~j~0#1| 4))) (.cse2 (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296))) (and (forall ((v_ArrVal_92 Int)) (= (mod (select (store .cse0 .cse1 v_ArrVal_92) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) .cse2)) (= (mod .cse3 4294967296) (mod (select .cse0 .cse4) 4294967296)) (or (forall ((v_ArrVal_92 Int) (|v_ULTIMATE.start_main_~j~0#1_123| Int)) (or (= (mod (select (let ((.cse5 (* (+ |c_ULTIMATE.start_main_~i~0#1| 1) .cse6))) (store (store .cse0 (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse5) (+ |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1| 1)) (+ (* |v_ULTIMATE.start_main_~j~0#1_123| 4) |c_ULTIMATE.start_main_~#A~0#1.offset| .cse5) v_ArrVal_92)) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) .cse2) (not (<= 1 |v_ULTIMATE.start_main_~j~0#1_123|)))) (< |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (forall ((v_ArrVal_92 Int) (|v_ULTIMATE.start_main_~j~0#1_123| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~j~0#1_123|)) (= .cse2 (mod (select (store (store .cse0 .cse4 .cse3) (+ (* |v_ULTIMATE.start_main_~j~0#1_123| 4) |c_ULTIMATE.start_main_~#A~0#1.offset| .cse7) v_ArrVal_92) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296)))) (forall ((v_ArrVal_92 Int) (|v_ULTIMATE.start_main_~j~0#1_123| Int)) (or (= (mod (select (store (store .cse0 .cse1 (+ |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ (* |v_ULTIMATE.start_main_~j~0#1_123| 4) |c_ULTIMATE.start_main_~#A~0#1.offset| .cse7) v_ArrVal_92) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) .cse2) (not (<= (+ |c_ULTIMATE.start_main_~j~0#1| 1) |v_ULTIMATE.start_main_~j~0#1_123|)))))))) is different from false [2022-11-22 02:47:45,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:47:48,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:47:50,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:48:13,446 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:48:15,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:48:33,143 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:48:41,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:49:00,900 WARN L233 SmtUtils]: Spent 12.28s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:49:04,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-22 02:49:06,474 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|)) (.cse2 (* (* |c_ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~i~0#1|)) (.cse0 (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296))) (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 1) (forall ((v_ArrVal_92 Int) (|v_ULTIMATE.start_main_~j~0#1_123| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~j~0#1_123|)) (= .cse0 (mod (select (store (store .cse1 (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse2) (+ |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ (* |v_ULTIMATE.start_main_~j~0#1_123| 4) |c_ULTIMATE.start_main_~#A~0#1.offset| .cse2) v_ArrVal_92) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296)))) (= (mod (select .cse1 |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) .cse0) (forall ((v_ArrVal_92 Int) (|v_ULTIMATE.start_main_~j~0#1_123| Int)) (or (= (mod (select (store (store .cse1 (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse2 (* |c_ULTIMATE.start_main_~j~0#1| 4)) (+ |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ (* |v_ULTIMATE.start_main_~j~0#1_123| 4) |c_ULTIMATE.start_main_~#A~0#1.offset| .cse2) v_ArrVal_92) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) .cse0) (not (<= (+ |c_ULTIMATE.start_main_~j~0#1| 1) |v_ULTIMATE.start_main_~j~0#1_123|)))))) is different from false [2022-11-22 02:49:21,982 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_ULTIMATE.start_main_~n~0#1| 4))) (let ((.cse3 (* .cse5 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse3 (* |c_ULTIMATE.start_main_~j~0#1| 4))) (.cse2 (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296)) (.cse6 (+ |c_ULTIMATE.start_main_~j~0#1| 1))) (and (forall ((v_ArrVal_92 Int)) (= (mod (select (store .cse0 .cse1 v_ArrVal_92) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) .cse2)) (= |c_ULTIMATE.start_main_~n~0#1| 1500) (= |c_ULTIMATE.start_main_~C~0#1| (select .cse0 |c_ULTIMATE.start_main_~#A~0#1.offset|)) (forall ((v_ArrVal_92 Int) (|v_ULTIMATE.start_main_~j~0#1_123| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~j~0#1_123|)) (= .cse2 (mod (select (store (store .cse0 (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse3) (+ |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ (* |v_ULTIMATE.start_main_~j~0#1_123| 4) |c_ULTIMATE.start_main_~#A~0#1.offset| .cse3) v_ArrVal_92) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296)))) (not (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (or (forall ((v_ArrVal_92 Int) (|v_ULTIMATE.start_main_~j~0#1_123| Int) (v_ArrVal_87 Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~j~0#1_123|)) (= .cse2 (mod (select (let ((.cse4 (* (+ |c_ULTIMATE.start_main_~i~0#1| 1) .cse5))) (store (store (store .cse0 .cse1 v_ArrVal_87) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse4) (+ |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1| 1)) (+ (* |v_ULTIMATE.start_main_~j~0#1_123| 4) |c_ULTIMATE.start_main_~#A~0#1.offset| .cse4) v_ArrVal_92)) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296)))) (< .cse6 |c_ULTIMATE.start_main_~s~0#1|)) (= (+ |c_ULTIMATE.start_main_~C~0#1| 1) (select .cse0 (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse5))) (forall ((v_ArrVal_92 Int) (|v_ULTIMATE.start_main_~j~0#1_123| Int)) (or (= (mod (select (store (store .cse0 .cse1 (+ |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ (* |v_ULTIMATE.start_main_~j~0#1_123| 4) |c_ULTIMATE.start_main_~#A~0#1.offset| .cse3) v_ArrVal_92) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) .cse2) (not (<= .cse6 |v_ULTIMATE.start_main_~j~0#1_123|)))))))) is different from false [2022-11-22 02:49:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:49:21,987 INFO L93 Difference]: Finished difference Result 157 states and 195 transitions. [2022-11-22 02:49:21,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-22 02:49:21,987 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-11-22 02:49:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:49:21,988 INFO L225 Difference]: With dead ends: 157 [2022-11-22 02:49:21,988 INFO L226 Difference]: Without dead ends: 155 [2022-11-22 02:49:21,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 289.6s TimeCoverageRelationStatistics Valid=925, Invalid=4585, Unknown=52, NotChecked=444, Total=6006 [2022-11-22 02:49:21,991 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 208 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 103 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 51.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:49:21,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 124 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 425 Invalid, 20 Unknown, 14 Unchecked, 51.7s Time] [2022-11-22 02:49:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-22 02:49:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 77. [2022-11-22 02:49:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.356164383561644) internal successors, (99), 73 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:49:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2022-11-22 02:49:22,055 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 20 [2022-11-22 02:49:22,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:49:22,056 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2022-11-22 02:49:22,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:49:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2022-11-22 02:49:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 02:49:22,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:49:22,057 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:49:22,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:49:22,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:49:22,259 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:49:22,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:49:22,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1848823070, now seen corresponding path program 3 times [2022-11-22 02:49:22,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:49:22,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434607882] [2022-11-22 02:49:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:49:22,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:49:22,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:49:22,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432376344] [2022-11-22 02:49:22,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:49:22,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:49:22,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:49:22,267 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:49:22,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:49:22,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:49:22,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:49:22,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:49:22,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:49:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:49:22,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:49:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:49:22,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:49:22,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434607882] [2022-11-22 02:49:22,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:49:22,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432376344] [2022-11-22 02:49:22,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432376344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:49:22,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [564140243] [2022-11-22 02:49:22,522 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 02:49:22,522 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:49:22,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:49:22,523 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:49:22,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:49:22,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:22,580 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:49:22,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:49:22,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:22,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-22 02:49:22,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:22,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-11-22 02:49:22,832 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 0 case distinctions, treesize of input 25 treesize of output 22 [2022-11-22 02:49:23,110 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-11-22 02:49:23,146 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:49:25,603 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2881#(and (<= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 1500 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1500) (<= 0 |ULTIMATE.start_main_~#A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~q~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:49:25,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:49:25,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:49:25,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-22 02:49:25,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825291137] [2022-11-22 02:49:25,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:49:25,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:49:25,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:49:25,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:49:25,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:49:25,605 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:49:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:49:26,073 INFO L93 Difference]: Finished difference Result 184 states and 242 transitions. [2022-11-22 02:49:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:49:26,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-22 02:49:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:49:26,075 INFO L225 Difference]: With dead ends: 184 [2022-11-22 02:49:26,075 INFO L226 Difference]: Without dead ends: 130 [2022-11-22 02:49:26,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:49:26,077 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 67 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:49:26,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 73 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:49:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-22 02:49:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 101. [2022-11-22 02:49:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 97 states have internal predecessors, (131), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:49:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2022-11-22 02:49:26,165 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 22 [2022-11-22 02:49:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:49:26,165 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2022-11-22 02:49:26,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:49:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2022-11-22 02:49:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 02:49:26,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:49:26,167 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:49:26,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:49:26,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:49:26,370 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:49:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:49:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash -360487098, now seen corresponding path program 4 times [2022-11-22 02:49:26,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:49:26,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629502099] [2022-11-22 02:49:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:49:26,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:49:26,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:49:26,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871300117] [2022-11-22 02:49:26,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:49:26,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:49:26,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:49:26,380 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:49:26,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc0dfdf8-cc50-4bbe-bbef-28ef65d2826d/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:49:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:49:26,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-22 02:49:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:49:26,637 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 02:49:26,742 INFO L321 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2022-11-22 02:49:26,742 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 31 treesize of output 30 [2022-11-22 02:49:26,819 INFO L321 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2022-11-22 02:49:26,819 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 3 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 02:49:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:49:27,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:49:35,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 140 treesize of output 136 [2022-11-22 02:49:35,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:49:35,210 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 5636 treesize of output 5568 [2022-11-22 02:56:59,105 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts.