./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/pcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/pcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW --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 f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 --- 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-4e7fbc6 [2022-11-23 15:07:13,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:07:13,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:07:13,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:07:13,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:07:13,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:07:13,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:07:13,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:07:13,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:07:13,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:07:13,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:07:13,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:07:13,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:07:13,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:07:13,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:07:13,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:07:13,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:07:13,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:07:13,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:07:13,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:07:13,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:07:13,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:07:13,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:07:13,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:07:13,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:07:13,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:07:13,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:07:13,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:07:13,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:07:13,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:07:13,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:07:13,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:07:13,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:07:13,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:07:13,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:07:13,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:07:13,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:07:13,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:07:13,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:07:13,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:07:13,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:07:13,729 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:07:13,765 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:07:13,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:07:13,765 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:07:13,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:07:13,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:07:13,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:07:13,767 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:07:13,767 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:07:13,768 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:07:13,768 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:07:13,769 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:07:13,769 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:07:13,769 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:07:13,769 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:07:13,769 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:07:13,770 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:07:13,770 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:07:13,770 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:07:13,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:07:13,771 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:07:13,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:07:13,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:07:13,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:07:13,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:07:13,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:07:13,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:07:13,772 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:07:13,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:07:13,773 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:07:13,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:07:13,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:07:13,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:07:13,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:07:13,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:07:13,774 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:07:13,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:07:13,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:07:13,775 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:07:13,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:07:13,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:07:13,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:07:13,775 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_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 [2022-11-23 15:07:14,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:07:14,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:07:14,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:07:14,062 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:07:14,062 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:07:14,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-fpi/pcompf.c [2022-11-23 15:07:17,081 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:07:17,313 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:07:17,314 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/sv-benchmarks/c/array-fpi/pcompf.c [2022-11-23 15:07:17,325 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/data/ee1d9345f/3f8e58c1c3c942549187bd6e382addb8/FLAGbe53e99ca [2022-11-23 15:07:17,351 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/data/ee1d9345f/3f8e58c1c3c942549187bd6e382addb8 [2022-11-23 15:07:17,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:07:17,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:07:17,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:07:17,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:07:17,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:07:17,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13befd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17, skipping insertion in model container [2022-11-23 15:07:17,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:07:17,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:07:17,608 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_76fadea2-d895-410b-b750-ff3fa03448f7/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2022-11-23 15:07:17,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:07:17,660 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:07:17,676 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_76fadea2-d895-410b-b750-ff3fa03448f7/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2022-11-23 15:07:17,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:07:17,723 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:07:17,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17 WrapperNode [2022-11-23 15:07:17,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:07:17,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:07:17,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:07:17,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:07:17,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,759 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2022-11-23 15:07:17,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:07:17,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:07:17,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:07:17,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:07:17,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,783 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:07:17,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:07:17,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:07:17,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:07:17,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17" (1/1) ... [2022-11-23 15:07:17,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:07:17,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:17,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:07:17,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:07:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:07:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:07:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:07:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:07:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:07:17,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:07:17,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:07:17,937 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:07:17,940 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:07:18,134 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:07:18,214 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:07:18,216 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 15:07:18,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:07:18 BoogieIcfgContainer [2022-11-23 15:07:18,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:07:18,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:07:18,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:07:18,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:07:18,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:07:17" (1/3) ... [2022-11-23 15:07:18,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b1537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:07:18, skipping insertion in model container [2022-11-23 15:07:18,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:17" (2/3) ... [2022-11-23 15:07:18,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b1537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:07:18, skipping insertion in model container [2022-11-23 15:07:18,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:07:18" (3/3) ... [2022-11-23 15:07:18,238 INFO L112 eAbstractionObserver]: Analyzing ICFG pcompf.c [2022-11-23 15:07:18,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:07:18,259 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:07:18,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:07:18,332 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;@95ba768, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:07:18,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:07:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:07:18,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:18,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:18,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash 697271499, now seen corresponding path program 1 times [2022-11-23 15:07:18,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:18,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909557317] [2022-11-23 15:07:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:18,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:18,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:18,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339621109] [2022-11-23 15:07:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:18,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:18,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:18,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:18,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:07:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:18,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 15:07:18,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:19,044 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-11-23 15:07:19,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2022-11-23 15:07:19,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-23 15:07:19,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-23 15:07:19,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-23 15:07:19,661 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 5 treesize of output 3 [2022-11-23 15:07:19,847 INFO L321 Elim1Store]: treesize reduction 86, result has 16.5 percent of original size [2022-11-23 15:07:19,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 102 treesize of output 105 [2022-11-23 15:07:19,863 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 5 treesize of output 3 [2022-11-23 15:07:19,907 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 5 treesize of output 3 [2022-11-23 15:07:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:07:19,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:07:19,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:19,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909557317] [2022-11-23 15:07:19,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:19,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339621109] [2022-11-23 15:07:19,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339621109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:19,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:07:19,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:07:19,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041053615] [2022-11-23 15:07:19,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:19,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:07:19,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:20,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:07:20,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:07:20,011 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:20,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:20,156 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-11-23 15:07:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:07:20,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 15:07:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:20,186 INFO L225 Difference]: With dead ends: 37 [2022-11-23 15:07:20,187 INFO L226 Difference]: Without dead ends: 22 [2022-11-23 15:07:20,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:07:20,198 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:20,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 19 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:07:20,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-23 15:07:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2022-11-23 15:07:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:20,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2022-11-23 15:07:20,236 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 8 [2022-11-23 15:07:20,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:20,237 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2022-11-23 15:07:20,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:20,237 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2022-11-23 15:07:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:07:20,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:20,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:20,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:20,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 15:07:20,446 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:20,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:20,446 INFO L85 PathProgramCache]: Analyzing trace with hash 131371694, now seen corresponding path program 1 times [2022-11-23 15:07:20,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:20,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607744565] [2022-11-23 15:07:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:20,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:20,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:20,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693748523] [2022-11-23 15:07:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:20,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:20,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:20,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:20,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:07:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:20,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:07:20,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:07:20,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:07:20,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:20,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607744565] [2022-11-23 15:07:20,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693748523] [2022-11-23 15:07:20,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693748523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:20,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:07:20,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:07:20,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915168174] [2022-11-23 15:07:20,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:20,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:07:20,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:07:20,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:07:20,591 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:20,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:20,660 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-11-23 15:07:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:07:20,660 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:07:20,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:20,661 INFO L225 Difference]: With dead ends: 36 [2022-11-23 15:07:20,661 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 15:07:20,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:07:20,663 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:20,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:07:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 15:07:20,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2022-11-23 15:07:20,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-23 15:07:20,669 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2022-11-23 15:07:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:20,670 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-23 15:07:20,670 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-23 15:07:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:07:20,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:20,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:20,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:20,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:20,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:20,883 INFO L85 PathProgramCache]: Analyzing trace with hash -197136011, now seen corresponding path program 1 times [2022-11-23 15:07:20,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:20,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654997233] [2022-11-23 15:07:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:20,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:20,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:20,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125384036] [2022-11-23 15:07:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:20,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:20,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:20,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:20,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:07:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:21,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:07:21,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:07:21,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:07:21,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654997233] [2022-11-23 15:07:21,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125384036] [2022-11-23 15:07:21,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125384036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:21,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697392686] [2022-11-23 15:07:21,093 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 15:07:21,093 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:21,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:21,104 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:21,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:21,342 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-23 15:07:21,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-23 15:07:21,474 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:07:21,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-23 15:07:21,770 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-23 15:07:21,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-23 15:07:21,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:21,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-23 15:07:22,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:22,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:22,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:22,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:22,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:22,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:22,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:22,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:22,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:22,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:22,190 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-23 15:07:22,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-23 15:07:22,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-23 15:07:22,418 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:07:22,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '288#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= ~N~0 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-23 15:07:22,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:07:22,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:07:22,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-23 15:07:22,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191488413] [2022-11-23 15:07:22,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:07:22,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:07:22,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:22,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:07:22,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:07:22,793 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:22,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:22,892 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-23 15:07:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:07:22,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:07:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:22,893 INFO L225 Difference]: With dead ends: 33 [2022-11-23 15:07:22,893 INFO L226 Difference]: Without dead ends: 27 [2022-11-23 15:07:22,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:07:22,894 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:22,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:07:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-23 15:07:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-11-23 15:07:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-23 15:07:22,901 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-11-23 15:07:22,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:22,901 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-23 15:07:22,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-23 15:07:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:07:22,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:22,902 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:22,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:23,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-23 15:07:23,103 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1958511373, now seen corresponding path program 1 times [2022-11-23 15:07:23,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:23,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447882106] [2022-11-23 15:07:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:23,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:23,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:23,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57725420] [2022-11-23 15:07:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:23,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:23,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:23,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:23,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:07:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:23,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:07:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:07:23,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:07:23,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:23,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447882106] [2022-11-23 15:07:23,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:23,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57725420] [2022-11-23 15:07:23,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57725420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:23,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:07:23,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:07:23,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179548694] [2022-11-23 15:07:23,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:23,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:07:23,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:23,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:07:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:07:23,265 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:23,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:23,357 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-23 15:07:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:07:23,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:07:23,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:23,358 INFO L225 Difference]: With dead ends: 29 [2022-11-23 15:07:23,359 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 15:07:23,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:07:23,360 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:23,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:07:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 15:07:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-11-23 15:07:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-23 15:07:23,363 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 11 [2022-11-23 15:07:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:23,364 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-23 15:07:23,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-23 15:07:23,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:07:23,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:23,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:23,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:23,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:23,565 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:23,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:23,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1012980313, now seen corresponding path program 1 times [2022-11-23 15:07:23,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:23,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428013108] [2022-11-23 15:07:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:23,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:23,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:23,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466743117] [2022-11-23 15:07:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:23,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:23,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:23,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:23,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:07:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:23,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 15:07:23,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:23,717 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 14 treesize of output 12 [2022-11-23 15:07:23,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:23,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:23,740 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:07:23,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 15:07:23,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-23 15:07:23,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:07:23,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 15:07:23,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:23,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 15:07:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:07:23,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:23,950 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_267 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_267) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) is different from false [2022-11-23 15:07:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 15:07:24,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:24,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428013108] [2022-11-23 15:07:24,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:24,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466743117] [2022-11-23 15:07:24,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466743117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:24,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [163986840] [2022-11-23 15:07:24,039 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 15:07:24,040 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:24,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:24,040 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:24,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:24,286 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-23 15:07:24,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-23 15:07:24,395 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:07:24,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-23 15:07:24,669 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-23 15:07:24,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-23 15:07:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:24,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-23 15:07:24,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:24,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:24,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:24,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,945 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-23 15:07:24,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-23 15:07:25,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-23 15:07:25,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:25,133 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:25,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-23 15:07:25,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:25,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:25,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:25,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:25,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:25,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:25,217 INFO L321 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-23 15:07:25,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-23 15:07:25,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:25,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:25,268 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:25,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:25,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:25,290 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:25,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-23 15:07:25,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:25,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:25,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:25,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:25,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:25,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:25,359 INFO L321 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-23 15:07:25,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-23 15:07:25,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:25,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:25,425 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:25,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:25,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:07:25,966 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-23 15:07:25,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:07:25,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:07:25,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-23 15:07:25,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273029054] [2022-11-23 15:07:25,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:07:25,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 15:07:25,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:25,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 15:07:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=251, Unknown=5, NotChecked=32, Total=342 [2022-11-23 15:07:25,969 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:26,378 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-11-23 15:07:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:07:26,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:07:26,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:26,380 INFO L225 Difference]: With dead ends: 38 [2022-11-23 15:07:26,382 INFO L226 Difference]: Without dead ends: 36 [2022-11-23 15:07:26,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=506, Unknown=5, NotChecked=48, Total=702 [2022-11-23 15:07:26,384 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:26,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 29 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 78 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-11-23 15:07:26,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-23 15:07:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 17. [2022-11-23 15:07:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-23 15:07:26,404 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2022-11-23 15:07:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:26,404 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-23 15:07:26,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-23 15:07:26,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 15:07:26,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:26,405 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:26,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:26,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:26,606 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:26,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:26,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1778160839, now seen corresponding path program 2 times [2022-11-23 15:07:26,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:26,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533155527] [2022-11-23 15:07:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:26,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:26,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:26,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917958566] [2022-11-23 15:07:26,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:07:26,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:26,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:26,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:26,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:07:26,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:07:26,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:07:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:07:26,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:07:26,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:07:26,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:26,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533155527] [2022-11-23 15:07:26,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:26,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917958566] [2022-11-23 15:07:26,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917958566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:26,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702242109] [2022-11-23 15:07:26,903 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 15:07:26,903 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:26,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:26,903 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:26,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:26,987 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:07:26,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-23 15:07:27,220 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-23 15:07:27,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-23 15:07:27,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-23 15:07:27,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:27,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-23 15:07:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:27,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:27,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:27,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,517 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-23 15:07:27,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 492 treesize of output 484 [2022-11-23 15:07:27,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-23 15:07:27,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,691 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:27,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-23 15:07:27,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:27,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:27,764 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-23 15:07:27,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-23 15:07:27,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:27,816 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:27,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:27,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:27,838 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:27,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:27,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:27,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:27,879 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-23 15:07:27,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-23 15:07:27,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:27,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:27,916 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:27,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:27,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:07:28,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '737#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-23 15:07:28,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:07:28,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:07:28,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-23 15:07:28,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104370412] [2022-11-23 15:07:28,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:07:28,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:07:28,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:28,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:07:28,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:07:28,236 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:28,375 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-11-23 15:07:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:07:28,376 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 15:07:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:28,377 INFO L225 Difference]: With dead ends: 52 [2022-11-23 15:07:28,377 INFO L226 Difference]: Without dead ends: 40 [2022-11-23 15:07:28,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:07:28,378 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:28,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 18 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:07:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-23 15:07:28,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2022-11-23 15:07:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-11-23 15:07:28,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 13 [2022-11-23 15:07:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:28,387 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-11-23 15:07:28,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:28,388 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-11-23 15:07:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 15:07:28,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:28,388 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:28,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:28,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:28,595 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:28,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1261411007, now seen corresponding path program 1 times [2022-11-23 15:07:28,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:28,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235704206] [2022-11-23 15:07:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:28,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:28,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:28,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160295804] [2022-11-23 15:07:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:28,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:28,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:28,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:28,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:07:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:28,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 15:07:28,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:29,435 INFO L321 Elim1Store]: treesize reduction 252, result has 37.8 percent of original size [2022-11-23 15:07:29,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 462 treesize of output 894 [2022-11-23 15:07:29,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-23 15:07:29,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 37 treesize of output 33 [2022-11-23 15:07:29,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-23 15:07:29,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-23 15:07:29,939 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 5 treesize of output 3 [2022-11-23 15:07:32,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:32,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:32,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:32,574 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-23 15:07:32,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 575 treesize of output 548 [2022-11-23 15:07:33,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:33,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:33,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:33,061 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-23 15:07:33,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 622 treesize of output 585 [2022-11-23 15:07:33,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1828 treesize of output 1833 [2022-11-23 15:07:34,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:34,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 3 [2022-11-23 15:07:34,661 INFO L321 Elim1Store]: treesize reduction 40, result has 16.7 percent of original size [2022-11-23 15:07:34,661 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 1778 treesize of output 1519 [2022-11-23 15:07:35,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:35,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:35,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 38 [2022-11-23 15:07:35,648 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-23 15:07:35,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 671 treesize of output 624 [2022-11-23 15:07:36,123 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:36,124 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 23 treesize of output 19 [2022-11-23 15:07:36,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:36,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:36,457 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:36,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 188 [2022-11-23 15:07:36,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-23 15:07:36,482 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 5 treesize of output 3 [2022-11-23 15:07:36,487 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 5 treesize of output 3 [2022-11-23 15:07:36,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:36,539 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:36,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 15:07:36,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:36,570 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-23 15:07:36,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 39 [2022-11-23 15:07:36,696 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:07:36,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 30 [2022-11-23 15:07:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:07:36,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:36,959 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_405 (Array Int Int)) (v_ArrVal_407 Int)) (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_405))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|))) (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse0 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_407)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) 1)) is different from false [2022-11-23 15:07:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-23 15:07:36,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235704206] [2022-11-23 15:07:36,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160295804] [2022-11-23 15:07:36,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160295804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:36,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1558950784] [2022-11-23 15:07:36,989 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:07:36,989 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:36,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:36,990 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:36,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:37,193 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-23 15:07:37,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-23 15:07:37,434 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-23 15:07:37,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-23 15:07:37,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-23 15:07:37,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:37,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-23 15:07:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:37,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:37,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:37,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,660 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-23 15:07:37,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-23 15:07:37,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-23 15:07:37,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,778 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:37,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-23 15:07:37,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:37,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:37,840 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-23 15:07:37,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-23 15:07:37,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:37,877 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:37,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:37,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:37,896 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:37,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:37,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:37,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:37,940 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-23 15:07:37,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-23 15:07:37,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:37,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:37,971 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:37,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:38,130 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:07:38,711 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '964#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2022-11-23 15:07:38,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:07:38,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:07:38,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2022-11-23 15:07:38,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903145970] [2022-11-23 15:07:38,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:07:38,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 15:07:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:38,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 15:07:38,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=432, Unknown=3, NotChecked=42, Total=552 [2022-11-23 15:07:38,713 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:39,932 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-11-23 15:07:39,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 15:07:39,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 15:07:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:39,935 INFO L225 Difference]: With dead ends: 40 [2022-11-23 15:07:39,935 INFO L226 Difference]: Without dead ends: 38 [2022-11-23 15:07:39,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=171, Invalid=820, Unknown=5, NotChecked=60, Total=1056 [2022-11-23 15:07:39,936 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 15 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:39,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 51 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 155 Invalid, 5 Unknown, 22 Unchecked, 0.3s Time] [2022-11-23 15:07:39,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-23 15:07:39,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-11-23 15:07:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-11-23 15:07:39,963 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2022-11-23 15:07:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:39,963 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-11-23 15:07:39,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-11-23 15:07:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 15:07:39,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:39,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:39,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 15:07:40,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:40,171 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1815978007, now seen corresponding path program 2 times [2022-11-23 15:07:40,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:40,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182272359] [2022-11-23 15:07:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:40,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:40,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:40,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146369486] [2022-11-23 15:07:40,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:07:40,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:40,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:40,213 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:40,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:07:40,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:07:40,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:07:40,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:07:40,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:07:40,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:07:40,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:40,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182272359] [2022-11-23 15:07:40,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:40,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146369486] [2022-11-23 15:07:40,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146369486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:40,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [671890844] [2022-11-23 15:07:40,404 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:07:40,404 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:40,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:40,404 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:40,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:40,595 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-23 15:07:40,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-23 15:07:40,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-23 15:07:40,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-23 15:07:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:40,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-11-23 15:07:40,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:40,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:40,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:40,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:40,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:40,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:40,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:40,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:40,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:40,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:40,879 INFO L321 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2022-11-23 15:07:40,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 484 treesize of output 487 [2022-11-23 15:07:41,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-23 15:07:41,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:41,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:41,052 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:41,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:41,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:41,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:41,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:41,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:41,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:41,093 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-23 15:07:41,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-23 15:07:41,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:41,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:41,144 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:41,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:41,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:41,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:41,196 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:41,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:41,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:41,235 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:41,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:41,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:41,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:41,261 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:41,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:41,422 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:07:41,940 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1191#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2022-11-23 15:07:41,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:07:41,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:07:41,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-23 15:07:41,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447320402] [2022-11-23 15:07:41,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:07:41,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:07:41,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:41,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:07:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:07:41,943 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:42,085 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-11-23 15:07:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:07:42,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 15:07:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:42,086 INFO L225 Difference]: With dead ends: 52 [2022-11-23 15:07:42,086 INFO L226 Difference]: Without dead ends: 43 [2022-11-23 15:07:42,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:07:42,087 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:42,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 25 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:07:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-23 15:07:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2022-11-23 15:07:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-23 15:07:42,096 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2022-11-23 15:07:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:42,097 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-23 15:07:42,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-23 15:07:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 15:07:42,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:42,098 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:42,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:42,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 15:07:42,303 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:42,304 INFO L85 PathProgramCache]: Analyzing trace with hash 19414318, now seen corresponding path program 3 times [2022-11-23 15:07:42,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:42,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706145841] [2022-11-23 15:07:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:42,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:42,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:42,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380717131] [2022-11-23 15:07:42,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:07:42,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:42,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:42,348 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:42,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:07:42,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:07:42,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:07:42,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:07:42,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:07:42,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:07:42,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:42,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706145841] [2022-11-23 15:07:42,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:42,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380717131] [2022-11-23 15:07:42,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380717131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:42,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398220735] [2022-11-23 15:07:42,546 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 15:07:42,546 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:42,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:42,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:42,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:42,634 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-23 15:07:42,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-23 15:07:42,823 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-23 15:07:42,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-23 15:07:43,051 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-23 15:07:43,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-23 15:07:43,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:43,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-23 15:07:43,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:43,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:43,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:43,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,284 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-23 15:07:43,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 492 treesize of output 484 [2022-11-23 15:07:43,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-23 15:07:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:43,408 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:43,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:43,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:43,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:43,444 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-23 15:07:43,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-23 15:07:43,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:43,479 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:43,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:43,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:43,528 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:43,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-23 15:07:43,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:43,560 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:43,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:43,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:43,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:43,601 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:43,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:43,622 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:07:43,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1420#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-23 15:07:43,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:07:43,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:07:43,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-23 15:07:43,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971179861] [2022-11-23 15:07:43,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:07:43,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 15:07:43,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:43,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 15:07:43,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:07:43,965 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:44,195 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-11-23 15:07:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:07:44,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 15:07:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:44,196 INFO L225 Difference]: With dead ends: 65 [2022-11-23 15:07:44,196 INFO L226 Difference]: Without dead ends: 42 [2022-11-23 15:07:44,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:07:44,199 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:44,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:07:44,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-23 15:07:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2022-11-23 15:07:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-23 15:07:44,208 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 15 [2022-11-23 15:07:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:44,208 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-23 15:07:44,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-23 15:07:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 15:07:44,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:44,209 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:44,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:44,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:44,427 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:44,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:44,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1741655437, now seen corresponding path program 3 times [2022-11-23 15:07:44,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:44,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974954770] [2022-11-23 15:07:44,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:44,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:44,466 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:44,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70299922] [2022-11-23 15:07:44,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:07:44,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:44,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:44,473 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:44,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:07:44,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:07:44,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:07:44,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-23 15:07:44,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:45,239 INFO L321 Elim1Store]: treesize reduction 252, result has 37.8 percent of original size [2022-11-23 15:07:45,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 226 treesize of output 790 [2022-11-23 15:07:45,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 37 treesize of output 33 [2022-11-23 15:07:45,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-23 15:07:45,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-23 15:07:45,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-23 15:07:45,840 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 5 treesize of output 3 [2022-11-23 15:07:48,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:48,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:48,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:48,274 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-23 15:07:48,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 427 treesize of output 426 [2022-11-23 15:07:48,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:48,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:48,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:48,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:48,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:48,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 650 treesize of output 635 [2022-11-23 15:07:48,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:48,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:48,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:48,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:48,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:48,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 647 treesize of output 632 [2022-11-23 15:07:49,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1772 treesize of output 1768 [2022-11-23 15:07:50,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:50,551 INFO L321 Elim1Store]: treesize reduction 39, result has 29.1 percent of original size [2022-11-23 15:07:50,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 362 [2022-11-23 15:07:50,595 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 5 treesize of output 3 [2022-11-23 15:07:50,642 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 5 treesize of output 3 [2022-11-23 15:07:50,649 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 5 treesize of output 3 [2022-11-23 15:07:50,687 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 5 treesize of output 3 [2022-11-23 15:07:50,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:50,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:50,740 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 131 treesize of output 5 [2022-11-23 15:07:50,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:50,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:50,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:50,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:50,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 57 [2022-11-23 15:07:50,835 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 5 treesize of output 3 [2022-11-23 15:07:50,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:50,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:50,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 735 treesize of output 650 [2022-11-23 15:07:51,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:51,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:51,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 23 [2022-11-23 15:07:51,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:51,532 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 9 treesize of output 7 [2022-11-23 15:07:51,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:51,547 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 9 treesize of output 7 [2022-11-23 15:07:51,587 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:51,587 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 23 treesize of output 19 [2022-11-23 15:07:51,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:51,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:51,792 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:51,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 113 [2022-11-23 15:07:51,813 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 5 treesize of output 3 [2022-11-23 15:07:51,817 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 20 treesize of output 18 [2022-11-23 15:07:51,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-23 15:07:51,863 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:51,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-23 15:07:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:51,929 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:51,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 15:07:51,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:51,960 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:51,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 15:07:51,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:51,993 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-23 15:07:51,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 39 [2022-11-23 15:07:52,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:52,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:52,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:52,032 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-23 15:07:52,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 51 [2022-11-23 15:07:52,167 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:07:52,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 30 [2022-11-23 15:07:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:07:52,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:52,859 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_632 Int) (v_ArrVal_630 Int) (|v_ULTIMATE.start_main_~i~0#1_198| Int) (v_ArrVal_629 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_200| Int) (v_ArrVal_637 Int)) (or (= (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|))) (select (store (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_629))) (let ((.cse2 (store (store (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_630) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_200|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_632))) (let ((.cse0 (select (store .cse3 |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~c~0#1.base|))) (store .cse0 .cse1 (+ (select .cse0 |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_198|)) v_ArrVal_637) .cse1)) 1) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_198|)) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_200|)))) is different from false [2022-11-23 15:07:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-23 15:07:52,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974954770] [2022-11-23 15:07:52,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70299922] [2022-11-23 15:07:52,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70299922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458588538] [2022-11-23 15:07:52,903 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:07:52,903 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:52,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:52,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:52,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:53,097 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-23 15:07:53,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-23 15:07:53,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-23 15:07:53,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-23 15:07:53,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-23 15:07:53,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:53,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:53,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:53,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,332 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-23 15:07:53,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 492 treesize of output 484 [2022-11-23 15:07:53,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-23 15:07:53,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,455 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:53,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-23 15:07:53,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:53,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:53,512 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-23 15:07:53,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-23 15:07:53,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:53,561 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:53,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:53,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:53,582 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:53,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:53,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:53,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:53,618 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-23 15:07:53,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-23 15:07:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:53,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:07:53,646 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:07:53,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-23 15:07:53,784 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:07:54,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1709#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2022-11-23 15:07:54,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:07:54,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:07:54,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2022-11-23 15:07:54,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008387719] [2022-11-23 15:07:54,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:07:54,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 15:07:54,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 15:07:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=656, Unknown=2, NotChecked=52, Total=812 [2022-11-23 15:07:54,381 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:55,042 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-11-23 15:07:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:07:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 15:07:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:55,043 INFO L225 Difference]: With dead ends: 36 [2022-11-23 15:07:55,044 INFO L226 Difference]: Without dead ends: 34 [2022-11-23 15:07:55,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=228, Invalid=1096, Unknown=12, NotChecked=70, Total=1406 [2022-11-23 15:07:55,045 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 91 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 48 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:55,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 16 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 126 Invalid, 21 Unknown, 20 Unchecked, 0.2s Time] [2022-11-23 15:07:55,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-23 15:07:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-11-23 15:07:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-23 15:07:55,056 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 17 [2022-11-23 15:07:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:55,056 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-23 15:07:55,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:07:55,057 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-23 15:07:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 15:07:55,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:55,058 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:55,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:55,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:07:55,258 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:55,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:55,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1837651189, now seen corresponding path program 4 times [2022-11-23 15:07:55,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:55,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009660423] [2022-11-23 15:07:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:55,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:55,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:07:55,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001321004] [2022-11-23 15:07:55,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:07:55,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:55,282 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:55,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:07:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:07:55,408 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:07:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:07:55,463 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:07:55,464 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:07:55,465 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 15:07:55,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:55,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:55,675 INFO L444 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1] [2022-11-23 15:07:55,679 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:07:55,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:07:55 BoogieIcfgContainer [2022-11-23 15:07:55,718 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 15:07:55,718 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 15:07:55,718 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 15:07:55,719 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 15:07:55,720 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:07:18" (3/4) ... [2022-11-23 15:07:55,722 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-23 15:07:55,763 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fadea2-d895-410b-b750-ff3fa03448f7/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 15:07:55,764 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 15:07:55,764 INFO L158 Benchmark]: Toolchain (without parser) took 38408.89ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 97.8MB in the beginning and 162.7MB in the end (delta: -65.0MB). Peak memory consumption was 84.4MB. Max. memory is 16.1GB. [2022-11-23 15:07:55,764 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:07:55,765 INFO L158 Benchmark]: CACSL2BoogieTranslator took 364.81ms. Allocated memory is still 136.3MB. Free memory was 97.4MB in the beginning and 102.8MB in the end (delta: -5.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-23 15:07:55,765 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.10ms. Allocated memory is still 136.3MB. Free memory was 102.4MB in the beginning and 100.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:07:55,765 INFO L158 Benchmark]: Boogie Preprocessor took 25.78ms. Allocated memory is still 136.3MB. Free memory was 100.7MB in the beginning and 99.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:07:55,765 INFO L158 Benchmark]: RCFGBuilder took 433.02ms. Allocated memory is still 136.3MB. Free memory was 99.4MB in the beginning and 83.5MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-23 15:07:55,766 INFO L158 Benchmark]: TraceAbstraction took 37496.33ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 82.7MB in the beginning and 165.9MB in the end (delta: -83.2MB). Peak memory consumption was 69.4MB. Max. memory is 16.1GB. [2022-11-23 15:07:55,766 INFO L158 Benchmark]: Witness Printer took 45.28ms. Allocated memory is still 285.2MB. Free memory was 165.9MB in the beginning and 162.7MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:07:55,767 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 364.81ms. Allocated memory is still 136.3MB. Free memory was 97.4MB in the beginning and 102.8MB in the end (delta: -5.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.10ms. Allocated memory is still 136.3MB. Free memory was 102.4MB in the beginning and 100.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.78ms. Allocated memory is still 136.3MB. Free memory was 100.7MB in the beginning and 99.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 433.02ms. Allocated memory is still 136.3MB. Free memory was 99.4MB in the beginning and 83.5MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 37496.33ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 82.7MB in the beginning and 165.9MB in the end (delta: -83.2MB). Peak memory consumption was 69.4MB. Max. memory is 16.1GB. * Witness Printer took 45.28ms. Allocated memory is still 285.2MB. Free memory was 165.9MB in the beginning and 162.7MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] a[0] = 6 [L33] b[0] = 1 [L34] c[0] = 0 [L36] i=1 VAL [a={-2:0}, b={-1:0}, c={-3:0}, i=1, N=3] [L36] COND TRUE i