./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array6_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array6_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS --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 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:35:15,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:35:15,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:35:15,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:35:15,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:35:15,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:35:15,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:35:15,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:35:15,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:35:15,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:35:15,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:35:15,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:35:15,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:35:15,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:35:15,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:35:15,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:35:15,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:35:15,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:35:15,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:35:15,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:35:15,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:35:15,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:35:15,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:35:15,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:35:15,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:35:15,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:35:15,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:35:15,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:35:15,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:35:15,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:35:15,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:35:15,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:35:15,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:35:15,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:35:15,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:35:15,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:35:15,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:35:15,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:35:15,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:35:15,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:35:15,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:35:15,815 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:35:15,864 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:35:15,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:35:15,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:35:15,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:35:15,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:35:15,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:35:15,866 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:35:15,867 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:35:15,867 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:35:15,867 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:35:15,867 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:35:15,867 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:35:15,868 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:35:15,868 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:35:15,868 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:35:15,868 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:35:15,869 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:35:15,869 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:35:15,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:35:15,870 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:35:15,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:35:15,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:35:15,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:35:15,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:35:15,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:35:15,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:35:15,871 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:35:15,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:35:15,872 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:35:15,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:35:15,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:35:15,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:35:15,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:35:15,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:35:15,873 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:35:15,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:35:15,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:35:15,874 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:35:15,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:35:15,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:35:15,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:35:15,875 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_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2022-11-19 07:35:16,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:35:16,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:35:16,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:35:16,293 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:35:16,294 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:35:16,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2022-11-19 07:35:16,378 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/data/6ecf4cbda/a1655016db8f455a86b1e42a9d0c6b13/FLAGaaa81c705 [2022-11-19 07:35:16,918 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:35:16,920 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/sv-benchmarks/c/array-patterns/array6_pattern.c [2022-11-19 07:35:16,928 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/data/6ecf4cbda/a1655016db8f455a86b1e42a9d0c6b13/FLAGaaa81c705 [2022-11-19 07:35:17,251 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/data/6ecf4cbda/a1655016db8f455a86b1e42a9d0c6b13 [2022-11-19 07:35:17,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:35:17,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:35:17,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:35:17,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:35:17,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:35:17,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f7a3c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17, skipping insertion in model container [2022-11-19 07:35:17,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:35:17,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:35:17,602 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-11-19 07:35:17,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:35:17,651 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:35:17,672 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-11-19 07:35:17,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:35:17,703 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:35:17,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17 WrapperNode [2022-11-19 07:35:17,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:35:17,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:35:17,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:35:17,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:35:17,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,746 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-11-19 07:35:17,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:35:17,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:35:17,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:35:17,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:35:17,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,776 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:35:17,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:35:17,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:35:17,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:35:17,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17" (1/1) ... [2022-11-19 07:35:17,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:35:17,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:17,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:35:17,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:35:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:35:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:35:17,859 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:35:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:35:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:35:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:35:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:35:17,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:35:17,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:35:17,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:35:17,941 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:35:17,943 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:35:18,167 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:35:18,236 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:35:18,251 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 07:35:18,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:18 BoogieIcfgContainer [2022-11-19 07:35:18,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:35:18,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:35:18,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:35:18,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:35:18,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:17" (1/3) ... [2022-11-19 07:35:18,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404f43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:18, skipping insertion in model container [2022-11-19 07:35:18,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:17" (2/3) ... [2022-11-19 07:35:18,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404f43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:18, skipping insertion in model container [2022-11-19 07:35:18,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:18" (3/3) ... [2022-11-19 07:35:18,263 INFO L112 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2022-11-19 07:35:18,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:35:18,305 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:35:18,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:35:18,387 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;@13689266, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:35:18,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:35:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:18,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:35:18,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:18,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:18,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:18,412 INFO L85 PathProgramCache]: Analyzing trace with hash 857550697, now seen corresponding path program 1 times [2022-11-19 07:35:18,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:18,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049409725] [2022-11-19 07:35:18,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:18,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:18,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:18,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049409725] [2022-11-19 07:35:18,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049409725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:18,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:18,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:35:18,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833002864] [2022-11-19 07:35:18,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:18,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:35:18,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:35:18,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:35:18,706 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:35:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:18,743 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-11-19 07:35:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:35:18,746 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-19 07:35:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:18,754 INFO L225 Difference]: With dead ends: 24 [2022-11-19 07:35:18,754 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 07:35:18,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:35:18,761 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:18,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:35:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 07:35:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-19 07:35:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-19 07:35:18,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2022-11-19 07:35:18,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:18,798 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-19 07:35:18,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:35:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-19 07:35:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 07:35:18,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:18,801 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:18,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:35:18,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:18,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:18,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1659101310, now seen corresponding path program 1 times [2022-11-19 07:35:18,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:18,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918545349] [2022-11-19 07:35:18,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:18,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:35:19,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:19,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918545349] [2022-11-19 07:35:19,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918545349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:19,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:19,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:35:19,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083109065] [2022-11-19 07:35:19,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:19,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:35:19,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:35:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:35:19,138 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:19,186 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-19 07:35:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:35:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-19 07:35:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:19,188 INFO L225 Difference]: With dead ends: 19 [2022-11-19 07:35:19,189 INFO L226 Difference]: Without dead ends: 16 [2022-11-19 07:35:19,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:35:19,191 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:19,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:35:19,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-19 07:35:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-19 07:35:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-19 07:35:19,198 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2022-11-19 07:35:19,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:19,198 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-19 07:35:19,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-19 07:35:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:35:19,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:19,200 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:19,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:35:19,201 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:19,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:19,202 INFO L85 PathProgramCache]: Analyzing trace with hash 107201699, now seen corresponding path program 1 times [2022-11-19 07:35:19,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:19,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333371389] [2022-11-19 07:35:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:19,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:35:19,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:19,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333371389] [2022-11-19 07:35:19,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333371389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:19,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:19,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:35:19,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878202424] [2022-11-19 07:35:19,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:19,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:35:19,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:19,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:35:19,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:35:19,356 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:19,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:19,410 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-11-19 07:35:19,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:35:19,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-19 07:35:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:19,412 INFO L225 Difference]: With dead ends: 29 [2022-11-19 07:35:19,412 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 07:35:19,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:35:19,415 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:19,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:35:19,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 07:35:19,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-19 07:35:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-19 07:35:19,422 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2022-11-19 07:35:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:19,422 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-19 07:35:19,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-19 07:35:19,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:35:19,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:19,424 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:19,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:35:19,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:19,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1924715561, now seen corresponding path program 1 times [2022-11-19 07:35:19,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:19,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973721778] [2022-11-19 07:35:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:19,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:19,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:19,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974916527] [2022-11-19 07:35:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:19,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:19,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:19,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:19,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:35:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:19,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:35:19,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:35:19,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:35:19,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:19,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973721778] [2022-11-19 07:35:19,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:19,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974916527] [2022-11-19 07:35:19,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974916527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:19,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1887654054] [2022-11-19 07:35:19,812 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:35:19,812 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:19,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:19,824 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:19,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:20,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,170 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:20,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:20,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:35:20,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:20,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-19 07:35:20,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:20,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:20,681 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-19 07:35:20,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-19 07:35:20,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:20,845 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:35:20,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:35:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:20,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:20,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:20,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:20,995 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:35:20,996 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:35:21,173 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:35:21,223 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:22,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '314#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:22,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:22,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:22,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-19 07:35:22,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500981518] [2022-11-19 07:35:22,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:22,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:35:22,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:22,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:35:22,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:35:22,946 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:23,207 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-11-19 07:35:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:35:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2022-11-19 07:35:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:23,209 INFO L225 Difference]: With dead ends: 49 [2022-11-19 07:35:23,210 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 07:35:23,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:35:23,211 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:23,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 54 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:35:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 07:35:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-11-19 07:35:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-19 07:35:23,218 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2022-11-19 07:35:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:23,218 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-19 07:35:23,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-19 07:35:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:35:23,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:23,219 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:23,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:23,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:23,425 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:23,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:23,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1012202345, now seen corresponding path program 2 times [2022-11-19 07:35:23,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:23,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75522246] [2022-11-19 07:35:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:23,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:23,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:23,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035587029] [2022-11-19 07:35:23,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:35:23,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:23,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:23,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:23,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:35:23,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:35:23,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:23,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:35:23,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:35:23,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:35:23,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:23,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75522246] [2022-11-19 07:35:23,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:23,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035587029] [2022-11-19 07:35:23,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035587029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:23,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237364508] [2022-11-19 07:35:23,740 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:35:23,740 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:23,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:23,741 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:23,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:23,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:23,916 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:35:23,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:35:23,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:23,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,032 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:24,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:24,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-19 07:35:24,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:24,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:24,294 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-19 07:35:24,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-19 07:35:24,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:24,411 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:35:24,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:35:24,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:24,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:24,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:24,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:24,521 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:35:24,522 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:35:24,653 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:35:24,684 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:26,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '570#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:26,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:26,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:26,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-19 07:35:26,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038110309] [2022-11-19 07:35:26,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:26,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:35:26,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:26,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:35:26,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:35:26,297 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:35:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:26,390 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-11-19 07:35:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:35:26,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-19 07:35:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:26,392 INFO L225 Difference]: With dead ends: 28 [2022-11-19 07:35:26,392 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 07:35:26,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:35:26,394 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:26,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 43 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:35:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 07:35:26,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-19 07:35:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:35:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-19 07:35:26,401 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2022-11-19 07:35:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:26,401 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-19 07:35:26,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:35:26,402 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-19 07:35:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:35:26,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:26,403 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:26,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:26,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:26,603 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2055356873, now seen corresponding path program 3 times [2022-11-19 07:35:26,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:26,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179958328] [2022-11-19 07:35:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:26,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:26,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:26,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711410905] [2022-11-19 07:35:26,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:35:26,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:26,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:26,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:26,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:35:26,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:35:26,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:26,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-19 07:35:26,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:26,848 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 10 treesize of output 8 [2022-11-19 07:35:26,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:26,897 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-19 07:35:26,903 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 20 treesize of output 20 [2022-11-19 07:35:26,908 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 [2022-11-19 07:35:26,917 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 [2022-11-19 07:35:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:26,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:26,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 52 [2022-11-19 07:35:27,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-19 07:35:27,590 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-19 07:35:27,590 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 2 case distinctions, treesize of input 330 treesize of output 213 [2022-11-19 07:35:27,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-19 07:35:27,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-19 07:35:27,727 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-19 07:35:27,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 217 [2022-11-19 07:35:27,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:27,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:27,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 124 [2022-11-19 07:35:27,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:27,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:27,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:27,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2022-11-19 07:35:27,874 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 38 treesize of output 11 [2022-11-19 07:35:27,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 156 treesize of output 132 [2022-11-19 07:35:27,926 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-19 07:35:27,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 52 [2022-11-19 07:35:27,937 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 17 treesize of output 11 [2022-11-19 07:35:28,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:28,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:28,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:28,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:28,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:28,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:28,588 INFO L321 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2022-11-19 07:35:28,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 122 treesize of output 54 [2022-11-19 07:35:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:28,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:28,931 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_219 (Array Int Int)) (v_ArrVal_213 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_219) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_213) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) 0)) (not (< 2 c_~ARR_SIZE~0))) is different from false [2022-11-19 07:35:29,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:29,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179958328] [2022-11-19 07:35:29,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:29,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711410905] [2022-11-19 07:35:29,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711410905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:29,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565909601] [2022-11-19 07:35:29,174 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:35:29,175 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:29,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:29,175 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:29,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:29,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,319 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:29,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:29,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:35:29,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:29,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-19 07:35:29,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:29,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:29,542 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-19 07:35:29,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-19 07:35:29,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:29,639 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:35:29,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:35:29,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:29,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:29,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:29,730 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:35:29,730 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:35:29,814 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:35:29,836 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:31,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '788#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:31,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:31,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:35:31,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-19 07:35:31,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092945571] [2022-11-19 07:35:31,568 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:31,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:35:31,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:31,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:35:31,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1157, Unknown=2, NotChecked=70, Total=1406 [2022-11-19 07:35:31,569 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:31,794 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-11-19 07:35:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:35:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-19 07:35:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:31,799 INFO L225 Difference]: With dead ends: 42 [2022-11-19 07:35:31,801 INFO L226 Difference]: Without dead ends: 39 [2022-11-19 07:35:31,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=185, Invalid=1223, Unknown=2, NotChecked=72, Total=1482 [2022-11-19 07:35:31,803 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:31,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 99 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-11-19 07:35:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-19 07:35:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2022-11-19 07:35:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:35:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-19 07:35:31,826 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 22 [2022-11-19 07:35:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:31,826 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-19 07:35:31,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-19 07:35:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 07:35:31,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:31,828 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:31,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:32,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:32,029 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:32,029 INFO L85 PathProgramCache]: Analyzing trace with hash -708711620, now seen corresponding path program 4 times [2022-11-19 07:35:32,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:32,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045921768] [2022-11-19 07:35:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:32,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:32,048 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:32,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229729191] [2022-11-19 07:35:32,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:35:32,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:32,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:32,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:32,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:35:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:32,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:35:32,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:32,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:35:32,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:32,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045921768] [2022-11-19 07:35:32,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:32,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229729191] [2022-11-19 07:35:32,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229729191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:32,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668847704] [2022-11-19 07:35:32,390 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:35:32,390 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:32,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:32,391 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:32,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:32,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,502 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:35:32,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:35:32,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,614 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:32,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:32,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:35:32,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:32,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:32,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:32,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:32,862 INFO L321 Elim1Store]: treesize reduction 272, result has 16.3 percent of original size [2022-11-19 07:35:32,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 371 treesize of output 364 [2022-11-19 07:35:33,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:33,269 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:35:33,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:35:33,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:33,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:33,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:33,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:33,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:33,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:33,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:33,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:33,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:33,355 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:35:33,355 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:35:33,464 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:35:33,487 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:35,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1072#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:35,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:35,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:35,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-19 07:35:35,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143222935] [2022-11-19 07:35:35,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:35,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:35:35,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:35,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:35:35,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:35:35,171 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:35:35,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:35,386 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-11-19 07:35:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:35:35,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-11-19 07:35:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:35,388 INFO L225 Difference]: With dead ends: 59 [2022-11-19 07:35:35,388 INFO L226 Difference]: Without dead ends: 50 [2022-11-19 07:35:35,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:35:35,389 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:35,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 57 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:35:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-19 07:35:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-11-19 07:35:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:35:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-11-19 07:35:35,407 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 23 [2022-11-19 07:35:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:35,408 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-11-19 07:35:35,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:35:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-11-19 07:35:35,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 07:35:35,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:35,409 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:35,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:35,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:35,615 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:35,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:35,616 INFO L85 PathProgramCache]: Analyzing trace with hash -123210237, now seen corresponding path program 5 times [2022-11-19 07:35:35,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:35,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838947408] [2022-11-19 07:35:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:35,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:35,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:35,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334155570] [2022-11-19 07:35:35,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:35:35,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:35,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:35,649 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:35,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:35:35,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:35:35,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:35:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:35,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:35:36,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:36,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838947408] [2022-11-19 07:35:36,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:36,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334155570] [2022-11-19 07:35:36,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334155570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:36,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300808704] [2022-11-19 07:35:36,046 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:35:36,046 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:36,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:36,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:36,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:36,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,163 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:35:36,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:35:36,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,271 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:36,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:36,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:36,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-19 07:35:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:36,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:36,463 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-19 07:35:36,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-19 07:35:36,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:36,554 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:35:36,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:35:36,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:36,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:36,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:36,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:36,645 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:35:36,645 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:35:36,750 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:35:36,774 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:38,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1402#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:38,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:38,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:38,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-19 07:35:38,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625739454] [2022-11-19 07:35:38,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:38,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:35:38,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:38,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:35:38,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:35:38,188 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:35:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:38,393 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-11-19 07:35:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:35:38,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-11-19 07:35:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:38,395 INFO L225 Difference]: With dead ends: 52 [2022-11-19 07:35:38,395 INFO L226 Difference]: Without dead ends: 49 [2022-11-19 07:35:38,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:35:38,397 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:38,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 67 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:35:38,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-19 07:35:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-11-19 07:35:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:35:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-11-19 07:35:38,412 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2022-11-19 07:35:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:38,413 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-11-19 07:35:38,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:35:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-11-19 07:35:38,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:35:38,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:38,414 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:38,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 07:35:38,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 07:35:38,621 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash 475184706, now seen corresponding path program 6 times [2022-11-19 07:35:38,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:38,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112414431] [2022-11-19 07:35:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:38,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:38,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:38,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987714672] [2022-11-19 07:35:38,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:35:38,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:38,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:38,651 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:38,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:35:38,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:35:38,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:38,923 WARN L261 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-19 07:35:38,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:38,954 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 10 treesize of output 8 [2022-11-19 07:35:38,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:38,996 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-19 07:35:39,000 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 20 treesize of output 20 [2022-11-19 07:35:39,016 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 [2022-11-19 07:35:39,026 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 [2022-11-19 07:35:39,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 41 [2022-11-19 07:35:39,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:39,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:39,208 INFO L321 Elim1Store]: treesize reduction 42, result has 31.1 percent of original size [2022-11-19 07:35:39,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 99 treesize of output 82 [2022-11-19 07:35:39,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:39,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:39,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:39,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:39,342 INFO L321 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2022-11-19 07:35:39,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 164 treesize of output 103 [2022-11-19 07:35:40,175 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-19 07:35:40,176 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 2 case distinctions, treesize of input 419 treesize of output 280 [2022-11-19 07:35:40,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-19 07:35:40,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-19 07:35:40,277 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-19 07:35:40,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 275 treesize of output 298 [2022-11-19 07:35:40,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,389 INFO L321 Elim1Store]: treesize reduction 154, result has 16.8 percent of original size [2022-11-19 07:35:40,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 171 treesize of output 227 [2022-11-19 07:35:40,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,495 INFO L321 Elim1Store]: treesize reduction 86, result has 19.6 percent of original size [2022-11-19 07:35:40,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 86 [2022-11-19 07:35:40,691 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-19 07:35:40,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 135 [2022-11-19 07:35:40,705 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 47 treesize of output 35 [2022-11-19 07:35:40,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:40,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:35:40,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 124 [2022-11-19 07:35:42,480 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-11-19 07:35:42,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 207 treesize of output 83 [2022-11-19 07:35:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:42,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:47,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:47,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112414431] [2022-11-19 07:35:47,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:47,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987714672] [2022-11-19 07:35:47,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987714672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:47,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [377221151] [2022-11-19 07:35:47,563 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:35:47,563 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:47,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:47,564 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:47,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:47,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:47,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:47,687 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:47,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:47,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:47,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:35:47,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:47,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:47,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:47,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-19 07:35:47,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:47,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:47,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:47,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:47,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:47,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:47,912 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-19 07:35:47,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-19 07:35:47,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:48,014 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:35:48,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:35:48,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:48,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:48,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:48,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:48,122 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:35:48,123 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:35:48,254 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:35:48,279 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:50,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1702#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:50,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:50,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:35:50,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-19 07:35:50,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586822609] [2022-11-19 07:35:50,450 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:50,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:35:50,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:50,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:35:50,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1427, Unknown=5, NotChecked=0, Total=1640 [2022-11-19 07:35:50,452 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:51,752 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-11-19 07:35:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:35:51,753 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-11-19 07:35:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:51,754 INFO L225 Difference]: With dead ends: 61 [2022-11-19 07:35:51,754 INFO L226 Difference]: Without dead ends: 58 [2022-11-19 07:35:51,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=253, Invalid=1722, Unknown=5, NotChecked=0, Total=1980 [2022-11-19 07:35:51,756 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:51,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 134 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 310 Invalid, 0 Unknown, 70 Unchecked, 0.9s Time] [2022-11-19 07:35:51,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-19 07:35:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-11-19 07:35:51,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:35:51,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-19 07:35:51,781 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 24 [2022-11-19 07:35:51,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:51,782 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-19 07:35:51,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:35:51,782 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-19 07:35:51,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:35:51,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:51,783 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:51,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:51,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 07:35:51,991 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1845558755, now seen corresponding path program 7 times [2022-11-19 07:35:51,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:51,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119882943] [2022-11-19 07:35:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:51,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:52,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:52,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623303050] [2022-11-19 07:35:52,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:35:52,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:52,033 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:52,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:35:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:52,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:35:52,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:52,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:35:52,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:52,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119882943] [2022-11-19 07:35:52,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:52,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623303050] [2022-11-19 07:35:52,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623303050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:52,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1745720445] [2022-11-19 07:35:52,395 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:35:52,395 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:52,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:52,396 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:52,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:52,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,511 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:52,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-19 07:35:52,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:52,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-19 07:35:52,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:52,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:52,745 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-19 07:35:52,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-19 07:35:52,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:52,862 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:35:52,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:35:52,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:52,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:52,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:52,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:52,960 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:35:52,960 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:35:53,066 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:35:53,091 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:54,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2064#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:54,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:54,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:54,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-19 07:35:54,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337389986] [2022-11-19 07:35:54,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:54,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:35:54,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:54,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:35:54,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:35:54,842 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:35:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:55,298 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2022-11-19 07:35:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:35:55,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-19 07:35:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:55,299 INFO L225 Difference]: With dead ends: 81 [2022-11-19 07:35:55,300 INFO L226 Difference]: Without dead ends: 71 [2022-11-19 07:35:55,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 07:35:55,301 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:55,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 92 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:35:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-19 07:35:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-11-19 07:35:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 07:35:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-11-19 07:35:55,335 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 25 [2022-11-19 07:35:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:55,335 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-11-19 07:35:55,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:35:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-11-19 07:35:55,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:35:55,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:55,337 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:55,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:55,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:35:55,544 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1478734852, now seen corresponding path program 8 times [2022-11-19 07:35:55,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:55,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119036570] [2022-11-19 07:35:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:55,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:55,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:55,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141511708] [2022-11-19 07:35:55,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:35:55,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:55,566 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:55,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:35:55,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:35:55,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:55,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:35:55,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:56,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:35:56,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:56,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119036570] [2022-11-19 07:35:56,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:56,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141511708] [2022-11-19 07:35:56,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141511708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:56,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712660314] [2022-11-19 07:35:56,156 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:35:56,156 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:56,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:56,157 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:56,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:56,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,298 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:35:56,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:35:56,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,398 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:56,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:56,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:56,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-19 07:35:56,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:56,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:56,566 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-19 07:35:56,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-19 07:35:56,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:56,685 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:35:56,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:35:56,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:56,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:56,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:56,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:56,779 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:35:56,779 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:35:56,878 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:35:56,911 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:58,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2476#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:58,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:58,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:58,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-19 07:35:58,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588370647] [2022-11-19 07:35:58,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:58,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:35:58,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:58,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:35:58,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:35:58,329 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:35:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:58,681 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-11-19 07:35:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:35:58,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-19 07:35:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:58,683 INFO L225 Difference]: With dead ends: 71 [2022-11-19 07:35:58,683 INFO L226 Difference]: Without dead ends: 68 [2022-11-19 07:35:58,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:35:58,691 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:58,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 153 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:35:58,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-19 07:35:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2022-11-19 07:35:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 07:35:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-19 07:35:58,735 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 25 [2022-11-19 07:35:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:58,736 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-19 07:35:58,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:35:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-19 07:35:58,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:35:58,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:58,738 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:58,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:58,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:58,946 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:58,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:58,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1403594601, now seen corresponding path program 9 times [2022-11-19 07:35:58,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:58,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115294220] [2022-11-19 07:35:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:58,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:58,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:58,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030249243] [2022-11-19 07:35:58,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:35:58,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:58,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:58,966 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:58,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:35:59,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:35:59,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:59,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-19 07:35:59,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:59,436 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 10 treesize of output 8 [2022-11-19 07:35:59,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,488 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-19 07:35:59,498 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 44 treesize of output 44 [2022-11-19 07:35:59,506 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 19 treesize of output 16 [2022-11-19 07:35:59,519 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 21 treesize of output 19 [2022-11-19 07:35:59,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 41 [2022-11-19 07:35:59,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:59,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:59,739 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-11-19 07:35:59,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-11-19 07:35:59,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:59,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:59,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:59,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:59,902 INFO L321 Elim1Store]: treesize reduction 50, result has 27.5 percent of original size [2022-11-19 07:35:59,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 123 treesize of output 112 [2022-11-19 07:36:00,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:00,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:00,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:00,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:00,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:00,090 INFO L321 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2022-11-19 07:36:00,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 206 treesize of output 133 [2022-11-19 07:36:01,387 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-19 07:36:01,387 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 2 case distinctions, treesize of input 461 treesize of output 312 [2022-11-19 07:36:01,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-19 07:36:01,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-19 07:36:01,564 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-19 07:36:01,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 330 [2022-11-19 07:36:01,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,915 INFO L321 Elim1Store]: treesize reduction 109, result has 31.9 percent of original size [2022-11-19 07:36:01,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 108 treesize of output 165 [2022-11-19 07:36:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:01,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:02,132 INFO L321 Elim1Store]: treesize reduction 231, result has 16.6 percent of original size [2022-11-19 07:36:02,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 274 treesize of output 321 [2022-11-19 07:36:03,504 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-19 07:36:03,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1236 treesize of output 1145 [2022-11-19 07:36:03,629 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 29 treesize of output 23 [2022-11-19 07:36:08,126 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:36:08,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 364 treesize of output 270 [2022-11-19 07:36:08,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:36:08,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 294 treesize of output 392 [2022-11-19 07:36:08,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:36:08,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 373 treesize of output 395 [2022-11-19 07:36:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:16,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:16,962 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_740 (Array Int Int)) (v_ArrVal_741 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_740) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_741) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4))))))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ 16 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)))))) 0)) (not (< 4 c_~ARR_SIZE~0))) is different from false [2022-11-19 07:36:17,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:17,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115294220] [2022-11-19 07:36:17,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:36:17,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030249243] [2022-11-19 07:36:17,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030249243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:17,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179520476] [2022-11-19 07:36:17,209 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:36:17,210 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:36:17,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:36:17,210 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:36:17,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:36:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,334 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:36:17,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:36:17,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,451 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:36:17,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:36:17,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:17,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-19 07:36:17,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:17,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:17,685 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-19 07:36:17,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-19 07:36:17,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:17,799 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:36:17,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:36:17,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:17,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:17,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:17,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:17,891 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:36:17,891 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:36:17,969 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:36:17,991 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:36:20,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2844#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:36:20,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:36:20,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:36:20,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-19 07:36:20,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457493302] [2022-11-19 07:36:20,425 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:20,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:36:20,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:20,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:36:20,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1573, Unknown=1, NotChecked=82, Total=1892 [2022-11-19 07:36:20,427 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:36:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:21,557 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2022-11-19 07:36:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:36:21,558 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-19 07:36:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:21,559 INFO L225 Difference]: With dead ends: 92 [2022-11-19 07:36:21,559 INFO L226 Difference]: Without dead ends: 89 [2022-11-19 07:36:21,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=278, Invalid=1887, Unknown=1, NotChecked=90, Total=2256 [2022-11-19 07:36:21,561 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:21,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 169 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 248 Invalid, 0 Unknown, 193 Unchecked, 0.8s Time] [2022-11-19 07:36:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-19 07:36:21,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2022-11-19 07:36:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:36:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-11-19 07:36:21,620 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 26 [2022-11-19 07:36:21,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:21,621 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-11-19 07:36:21,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:36:21,621 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-11-19 07:36:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:36:21,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:21,626 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:21,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:21,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:21,833 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:21,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1777613253, now seen corresponding path program 1 times [2022-11-19 07:36:21,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:21,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976218709] [2022-11-19 07:36:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:21,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:21,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:36:21,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381366045] [2022-11-19 07:36:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:21,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:21,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:21,847 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:21,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:36:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:22,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-19 07:36:22,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:22,056 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 10 treesize of output 8 [2022-11-19 07:36:22,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,086 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-19 07:36:22,090 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 20 treesize of output 20 [2022-11-19 07:36:22,094 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 [2022-11-19 07:36:22,101 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 [2022-11-19 07:36:22,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 41 [2022-11-19 07:36:22,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-19 07:36:22,619 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-19 07:36:22,619 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 2 case distinctions, treesize of input 146 treesize of output 103 [2022-11-19 07:36:22,628 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 38 treesize of output 41 [2022-11-19 07:36:22,657 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2022-11-19 07:36:22,657 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 3 case distinctions, treesize of input 84 treesize of output 93 [2022-11-19 07:36:22,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 44 [2022-11-19 07:36:22,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:22,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:22,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:22,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:22,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2022-11-19 07:36:22,723 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 28 treesize of output 17 [2022-11-19 07:36:22,729 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 17 treesize of output 11 [2022-11-19 07:36:23,289 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-19 07:36:23,290 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 2 case distinctions, treesize of input 368 treesize of output 245 [2022-11-19 07:36:23,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-19 07:36:23,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-19 07:36:23,359 INFO L321 Elim1Store]: treesize reduction 111, result has 8.3 percent of original size [2022-11-19 07:36:23,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 221 [2022-11-19 07:36:23,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:23,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:23,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 124 [2022-11-19 07:36:23,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:23,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:23,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:23,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 49 [2022-11-19 07:36:23,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:23,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 251 treesize of output 219 [2022-11-19 07:36:23,689 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 29 treesize of output 23 [2022-11-19 07:36:23,805 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 29 treesize of output 23 [2022-11-19 07:36:24,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:24,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:24,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:24,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:24,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:24,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:24,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:24,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:24,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:24,251 INFO L321 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2022-11-19 07:36:24,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 142 treesize of output 58 [2022-11-19 07:36:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:24,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:25,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:25,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976218709] [2022-11-19 07:36:25,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:36:25,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381366045] [2022-11-19 07:36:25,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381366045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:25,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1506272036] [2022-11-19 07:36:25,601 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:36:25,602 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:36:25,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:36:25,602 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:36:25,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:36:25,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:25,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:25,703 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:36:25,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:36:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:25,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:25,815 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:36:25,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:36:25,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:25,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:25,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:25,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-19 07:36:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:25,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:25,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:25,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:25,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:25,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:25,971 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-19 07:36:25,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-19 07:36:26,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:26,071 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:36:26,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:36:26,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:26,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:26,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:26,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:26,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:26,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:26,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:26,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:26,151 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:36:26,151 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:36:26,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:26,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:26,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:26,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:26,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:26,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:26,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:26,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:26,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:26,247 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:36:26,247 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:36:26,351 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:36:26,373 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:36:28,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3258#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:36:28,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:36:28,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:36:28,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-19 07:36:28,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104679665] [2022-11-19 07:36:28,701 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:28,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:36:28,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:28,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:36:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1544, Unknown=14, NotChecked=0, Total=1722 [2022-11-19 07:36:28,703 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:36:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:29,251 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2022-11-19 07:36:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:36:29,251 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-11-19 07:36:29,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:29,252 INFO L225 Difference]: With dead ends: 98 [2022-11-19 07:36:29,253 INFO L226 Difference]: Without dead ends: 90 [2022-11-19 07:36:29,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=199, Invalid=1855, Unknown=16, NotChecked=0, Total=2070 [2022-11-19 07:36:29,254 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:29,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 170 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-11-19 07:36:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-19 07:36:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2022-11-19 07:36:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 07:36:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2022-11-19 07:36:29,287 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 28 [2022-11-19 07:36:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:29,287 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2022-11-19 07:36:29,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:36:29,288 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2022-11-19 07:36:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:36:29,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:29,289 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:29,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:29,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:36:29,495 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash 561494428, now seen corresponding path program 10 times [2022-11-19 07:36:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:29,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836102988] [2022-11-19 07:36:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:29,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:29,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:36:29,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747167249] [2022-11-19 07:36:29,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:36:29,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:29,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:29,511 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:29,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:36:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:29,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:36:29,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:29,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:36:29,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:29,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836102988] [2022-11-19 07:36:29,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:36:29,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747167249] [2022-11-19 07:36:29,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747167249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:29,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [252230263] [2022-11-19 07:36:29,971 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:36:29,971 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:36:29,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:36:29,972 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:36:29,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:36:30,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,113 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:36:30,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:36:30,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,249 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:36:30,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:36:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:30,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-19 07:36:30,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:30,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:30,504 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-19 07:36:30,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-19 07:36:30,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:30,611 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:36:30,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:36:30,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:30,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:30,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:30,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:30,711 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:36:30,711 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:36:30,797 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:36:30,819 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:36:32,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3726#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:36:32,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:36:32,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:36:32,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-19 07:36:32,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307802895] [2022-11-19 07:36:32,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:32,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:36:32,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:32,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:36:32,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:36:32,411 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:36:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:33,045 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-11-19 07:36:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 07:36:33,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-11-19 07:36:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:33,046 INFO L225 Difference]: With dead ends: 112 [2022-11-19 07:36:33,046 INFO L226 Difference]: Without dead ends: 101 [2022-11-19 07:36:33,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 07:36:33,048 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:33,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 99 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:36:33,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-19 07:36:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2022-11-19 07:36:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:36:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2022-11-19 07:36:33,079 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 27 [2022-11-19 07:36:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:33,080 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2022-11-19 07:36:33,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:36:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2022-11-19 07:36:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:36:33,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:33,081 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:33,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:33,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:36:33,283 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:33,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:33,284 INFO L85 PathProgramCache]: Analyzing trace with hash 587607715, now seen corresponding path program 11 times [2022-11-19 07:36:33,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:33,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889521559] [2022-11-19 07:36:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:33,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:33,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:36:33,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454641336] [2022-11-19 07:36:33,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:36:33,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:33,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:33,302 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:33,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:36:33,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:36:33,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:36:33,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:36:33,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:33,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:36:34,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:34,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889521559] [2022-11-19 07:36:34,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:36:34,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454641336] [2022-11-19 07:36:34,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454641336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:36:34,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [980997781] [2022-11-19 07:36:34,011 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:36:34,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:36:34,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:36:34,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:36:34,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:36:34,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,131 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:36:34,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:36:34,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,248 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:36:34,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:36:34,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:34,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-19 07:36:34,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:34,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:34,434 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-19 07:36:34,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-19 07:36:34,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:34,546 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:36:34,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:36:34,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:34,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:34,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:34,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:34,634 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:36:34,634 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:36:34,708 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:36:34,734 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:36:36,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4250#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:36:36,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:36:36,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:36:36,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-19 07:36:36,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528648068] [2022-11-19 07:36:36,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:36,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:36:36,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:36,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:36:36,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:36:36,249 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:36:36,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:36,663 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2022-11-19 07:36:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:36:36,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-11-19 07:36:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:36,665 INFO L225 Difference]: With dead ends: 101 [2022-11-19 07:36:36,665 INFO L226 Difference]: Without dead ends: 98 [2022-11-19 07:36:36,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:36:36,673 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:36,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 136 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:36:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-19 07:36:36,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2022-11-19 07:36:36,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:36:36,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-11-19 07:36:36,729 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 27 [2022-11-19 07:36:36,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:36,729 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-11-19 07:36:36,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:36:36,729 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-11-19 07:36:36,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:36:36,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:36,730 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:36,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:36,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:36:36,937 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:36,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1035704738, now seen corresponding path program 12 times [2022-11-19 07:36:36,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:36,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978541734] [2022-11-19 07:36:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:36,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:36,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:36:36,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840711760] [2022-11-19 07:36:36,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:36:36,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:36,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:36,956 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:36,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:36:37,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:36:37,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:36:37,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 137 conjunts are in the unsatisfiable core [2022-11-19 07:36:37,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:37,413 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 10 treesize of output 8 [2022-11-19 07:36:37,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,459 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-19 07:36:37,465 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 20 treesize of output 20 [2022-11-19 07:36:37,470 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 [2022-11-19 07:36:37,479 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 [2022-11-19 07:36:37,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 56 [2022-11-19 07:36:37,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:37,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:37,639 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-11-19 07:36:37,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-11-19 07:36:37,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:37,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:37,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:37,780 INFO L321 Elim1Store]: treesize reduction 50, result has 27.5 percent of original size [2022-11-19 07:36:37,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 123 treesize of output 112 [2022-11-19 07:36:37,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:37,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:37,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:37,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:37,945 INFO L321 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2022-11-19 07:36:37,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 162 treesize of output 157 [2022-11-19 07:36:38,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:38,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:38,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:38,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:38,127 INFO L321 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2022-11-19 07:36:38,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 248 treesize of output 163 [2022-11-19 07:36:39,460 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-19 07:36:39,460 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 2 case distinctions, treesize of input 503 treesize of output 344 [2022-11-19 07:36:39,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-19 07:36:39,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-19 07:36:39,575 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-19 07:36:39,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 355 treesize of output 362 [2022-11-19 07:36:39,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,846 INFO L321 Elim1Store]: treesize reduction 308, result has 16.5 percent of original size [2022-11-19 07:36:39,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 235 treesize of output 289 [2022-11-19 07:36:39,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:39,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:40,066 INFO L321 Elim1Store]: treesize reduction 152, result has 28.6 percent of original size [2022-11-19 07:36:40,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 69 treesize of output 132 [2022-11-19 07:36:40,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 56 treesize of output 42 [2022-11-19 07:36:40,278 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 43 treesize of output 31 [2022-11-19 07:36:46,805 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:36:46,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 874 treesize of output 754 [2022-11-19 07:36:46,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 749 treesize of output 673 [2022-11-19 07:36:46,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 770 treesize of output 872 [2022-11-19 07:36:47,530 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 7 treesize of output 5 [2022-11-19 07:36:47,691 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 7 treesize of output 5 [2022-11-19 07:36:47,764 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 7 treesize of output 5 [2022-11-19 07:36:47,835 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 7 treesize of output 5 [2022-11-19 07:36:47,893 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 7 treesize of output 5 [2022-11-19 07:36:47,935 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 7 treesize of output 5 [2022-11-19 07:36:48,021 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 7 treesize of output 5 [2022-11-19 07:36:48,061 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 7 treesize of output 5 [2022-11-19 07:36:48,118 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 7 treesize of output 5 [2022-11-19 07:36:48,173 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 7 treesize of output 5 [2022-11-19 07:36:48,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 206 [2022-11-19 07:36:48,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 127 [2022-11-19 07:36:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:48,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:54,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:54,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978541734] [2022-11-19 07:36:54,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:36:54,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840711760] [2022-11-19 07:36:54,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840711760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:54,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1242119590] [2022-11-19 07:36:54,719 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:36:54,719 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:36:54,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:36:54,720 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:36:54,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:36:54,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:54,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:54,844 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:36:54,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:36:54,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:54,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:54,949 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:36:54,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:36:54,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:54,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:54,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:54,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-19 07:36:55,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:55,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:55,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:55,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:55,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:55,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:55,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:55,123 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-19 07:36:55,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-19 07:36:55,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:55,211 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-19 07:36:55,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-19 07:36:55,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:55,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:55,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:55,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:55,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:55,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:55,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:55,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:55,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:36:55,290 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-19 07:36:55,290 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-19 07:36:55,358 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-19 07:36:55,378 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:36:57,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4713#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:36:57,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:36:57,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:36:57,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-11-19 07:36:57,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596723706] [2022-11-19 07:36:57,900 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 07:36:57,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:36:57,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:57,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:36:57,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1888, Unknown=6, NotChecked=0, Total=2162 [2022-11-19 07:36:57,902 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:36:59,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:59,077 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2022-11-19 07:36:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:36:59,078 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-19 07:36:59,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:59,079 INFO L225 Difference]: With dead ends: 109 [2022-11-19 07:36:59,079 INFO L226 Difference]: Without dead ends: 106 [2022-11-19 07:36:59,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=288, Invalid=2156, Unknown=6, NotChecked=0, Total=2450 [2022-11-19 07:36:59,081 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:59,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 162 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 250 Invalid, 0 Unknown, 123 Unchecked, 0.8s Time] [2022-11-19 07:36:59,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-19 07:36:59,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2022-11-19 07:36:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 68 states have (on average 1.161764705882353) internal successors, (79), 68 states have internal predecessors, (79), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:36:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-11-19 07:36:59,128 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 28 [2022-11-19 07:36:59,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:59,128 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-11-19 07:36:59,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:36:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-11-19 07:36:59,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:36:59,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:59,129 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:59,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:36:59,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:36:59,330 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:59,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1177873296, now seen corresponding path program 2 times [2022-11-19 07:36:59,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:59,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446334396] [2022-11-19 07:36:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:59,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:59,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:36:59,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659228331] [2022-11-19 07:36:59,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:36:59,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:59,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:59,344 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:59,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a77c656-9f62-4b5a-9202-0bdb4580c7aa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:36:59,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:36:59,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:36:59,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-19 07:36:59,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:59,816 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 10 treesize of output 8 [2022-11-19 07:36:59,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:59,849 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-19 07:36:59,855 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 21 treesize of output 19 [2022-11-19 07:36:59,859 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 42 treesize of output 39 [2022-11-19 07:36:59,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:36:59,910 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 82 [2022-11-19 07:36:59,918 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 62 treesize of output 60 [2022-11-19 07:36:59,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 41 treesize of output 44 [2022-11-19 07:36:59,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 36 treesize of output 38 [2022-11-19 07:37:00,047 INFO L321 Elim1Store]: treesize reduction 39, result has 11.4 percent of original size [2022-11-19 07:37:00,048 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 2 case distinctions, treesize of input 173 treesize of output 147 [2022-11-19 07:37:00,058 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 52 treesize of output 53 [2022-11-19 07:37:00,104 INFO L321 Elim1Store]: treesize reduction 56, result has 8.2 percent of original size [2022-11-19 07:37:00,105 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 3 case distinctions, treesize of input 96 treesize of output 105 [2022-11-19 07:37:00,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 59 [2022-11-19 07:37:00,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 68 [2022-11-19 07:37:00,208 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-19 07:37:00,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 75 [2022-11-19 07:37:00,233 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 7 [2022-11-19 07:37:00,374 INFO L321 Elim1Store]: treesize reduction 33, result has 13.2 percent of original size [2022-11-19 07:37:00,374 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 2 case distinctions, treesize of input 163 treesize of output 139 [2022-11-19 07:37:00,382 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 48 treesize of output 49 [2022-11-19 07:37:00,405 INFO L321 Elim1Store]: treesize reduction 54, result has 8.5 percent of original size [2022-11-19 07:37:00,405 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 3 case distinctions, treesize of input 94 treesize of output 101 [2022-11-19 07:37:00,418 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 0 case distinctions, treesize of input 54 treesize of output 66 [2022-11-19 07:37:00,432 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 0 case distinctions, treesize of input 52 treesize of output 66 [2022-11-19 07:37:01,149 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-19 07:37:01,149 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 2 case distinctions, treesize of input 427 treesize of output 304 [2022-11-19 07:37:01,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-19 07:37:01,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-19 07:37:01,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 250 [2022-11-19 07:37:01,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,337 INFO L321 Elim1Store]: treesize reduction 159, result has 14.1 percent of original size [2022-11-19 07:37:01,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 191 [2022-11-19 07:37:01,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:37:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-11-19 07:37:01,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,470 INFO L321 Elim1Store]: treesize reduction 81, result has 24.3 percent of original size [2022-11-19 07:37:01,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 130 [2022-11-19 07:37:01,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 125 treesize of output 112 [2022-11-19 07:37:01,646 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 88 treesize of output 50 [2022-11-19 07:37:01,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 60 [2022-11-19 07:37:01,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,815 INFO L321 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2022-11-19 07:37:01,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 68 [2022-11-19 07:37:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:37:01,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:01,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 52 [2022-11-19 07:37:03,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:03,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:03,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:03,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:03,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:03,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:03,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:03,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:03,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:03,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:03,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:03,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:03,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:06,000 INFO L321 Elim1Store]: treesize reduction 1027, result has 31.2 percent of original size [2022-11-19 07:37:06,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 21 select indices, 21 select index equivalence classes, 20 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 102 case distinctions, treesize of input 358 treesize of output 646 [2022-11-19 07:37:27,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:27,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:25,112 WARN L233 SmtUtils]: Spent 57.36s on a formula simplification. DAG size of input: 1921 DAG size of output: 868 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-19 07:38:25,116 INFO L321 Elim1Store]: treesize reduction 7488, result has 32.9 percent of original size [2022-11-19 07:38:25,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 43 select indices, 43 select index equivalence classes, 6 disjoint index pairs (out of 903 index pairs), introduced 43 new quantified variables, introduced 903 case distinctions, treesize of input 565 treesize of output 3853