./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array3_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array3_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0 --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 8c9f77a5f5cfb41429e6b2e557580f5f8a855ca718c241fb5a07541ef3b21ab2 --- 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-e04fb08 [2022-11-16 20:16:17,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:16:17,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:16:17,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:16:17,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:16:17,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:16:17,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:16:17,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:16:17,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:16:17,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:16:17,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:16:17,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:16:17,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:16:17,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:16:17,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:16:17,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:16:17,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:16:17,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:16:17,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:16:17,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:16:18,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:16:18,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:16:18,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:16:18,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:16:18,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:16:18,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:16:18,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:16:18,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:16:18,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:16:18,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:16:18,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:16:18,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:16:18,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:16:18,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:16:18,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:16:18,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:16:18,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:16:18,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:16:18,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:16:18,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:16:18,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:16:18,039 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:16:18,080 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:16:18,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:16:18,081 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:16:18,081 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:16:18,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:16:18,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:16:18,083 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:16:18,083 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:16:18,084 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:16:18,084 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:16:18,085 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:16:18,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:16:18,086 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:16:18,086 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:16:18,086 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:16:18,087 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:16:18,087 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:16:18,087 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:16:18,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:16:18,088 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:16:18,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:16:18,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:16:18,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:16:18,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:16:18,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:16:18,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:16:18,090 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:16:18,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:16:18,092 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:16:18,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:16:18,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:16:18,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:16:18,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:16:18,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:16:18,094 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:16:18,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:16:18,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:16:18,095 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:16:18,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:16:18,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:16:18,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:16:18,096 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_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c9f77a5f5cfb41429e6b2e557580f5f8a855ca718c241fb5a07541ef3b21ab2 [2022-11-16 20:16:18,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:16:18,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:16:18,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:16:18,490 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:16:18,491 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:16:18,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-patterns/array3_pattern.c [2022-11-16 20:16:18,579 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/data/64966abb0/e1ede51b96bc4be1bad360eb3b14c801/FLAG16426eec1 [2022-11-16 20:16:19,077 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:16:19,078 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/sv-benchmarks/c/array-patterns/array3_pattern.c [2022-11-16 20:16:19,097 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/data/64966abb0/e1ede51b96bc4be1bad360eb3b14c801/FLAG16426eec1 [2022-11-16 20:16:19,478 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/data/64966abb0/e1ede51b96bc4be1bad360eb3b14c801 [2022-11-16 20:16:19,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:16:19,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:16:19,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:16:19,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:16:19,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:16:19,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65aa22ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19, skipping insertion in model container [2022-11-16 20:16:19,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:16:19,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:16:19,727 WARN L229 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_8b37c769-30de-40ee-bd67-b3d571158c73/sv-benchmarks/c/array-patterns/array3_pattern.c[1393,1406] [2022-11-16 20:16:19,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:16:19,762 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:16:19,776 WARN L229 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_8b37c769-30de-40ee-bd67-b3d571158c73/sv-benchmarks/c/array-patterns/array3_pattern.c[1393,1406] [2022-11-16 20:16:19,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:16:19,803 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:16:19,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19 WrapperNode [2022-11-16 20:16:19,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:16:19,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:16:19,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:16:19,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:16:19,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,856 INFO L138 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-11-16 20:16:19,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:16:19,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:16:19,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:16:19,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:16:19,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,905 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:16:19,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:16:19,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:16:19,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:16:19,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19" (1/1) ... [2022-11-16 20:16:19,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:16:19,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:16:19,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:16:19,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:16:20,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:16:20,002 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 20:16:20,002 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 20:16:20,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:16:20,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:16:20,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:16:20,003 INFO L130 BoogieDeclarations]: Found specification of procedure square [2022-11-16 20:16:20,003 INFO L138 BoogieDeclarations]: Found implementation of procedure square [2022-11-16 20:16:20,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:16:20,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:16:20,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:16:20,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:16:20,084 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:16:20,086 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:16:20,289 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:16:20,344 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:16:20,355 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 20:16:20,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:16:20 BoogieIcfgContainer [2022-11-16 20:16:20,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:16:20,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:16:20,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:16:20,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:16:20,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:16:19" (1/3) ... [2022-11-16 20:16:20,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc5d4f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:16:20, skipping insertion in model container [2022-11-16 20:16:20,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:16:19" (2/3) ... [2022-11-16 20:16:20,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc5d4f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:16:20, skipping insertion in model container [2022-11-16 20:16:20,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:16:20" (3/3) ... [2022-11-16 20:16:20,372 INFO L112 eAbstractionObserver]: Analyzing ICFG array3_pattern.c [2022-11-16 20:16:20,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:16:20,397 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:16:20,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:16:20,461 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;@79789f4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:16:20,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:16:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 20:16:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 20:16:20,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:20,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:16:20,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:16:20,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:20,481 INFO L85 PathProgramCache]: Analyzing trace with hash 168211832, now seen corresponding path program 1 times [2022-11-16 20:16:20,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:16:20,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413322486] [2022-11-16 20:16:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:20,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:16:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:20,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:16:20,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413322486] [2022-11-16 20:16:20,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413322486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:20,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:20,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:16:20,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239385515] [2022-11-16 20:16:20,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:20,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 20:16:20,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:16:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 20:16:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 20:16:20,877 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2022-11-16 20:16:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:20,973 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-11-16 20:16:20,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 20:16:20,977 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 [2022-11-16 20:16:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:20,985 INFO L225 Difference]: With dead ends: 36 [2022-11-16 20:16:20,985 INFO L226 Difference]: Without dead ends: 21 [2022-11-16 20:16:20,989 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 [2022-11-16 20:16:20,993 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:20,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:16:21,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-16 20:16:21,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-16 20:16:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 20:16:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-16 20:16:21,100 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2022-11-16 20:16:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:21,102 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-16 20:16:21,103 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) [2022-11-16 20:16:21,103 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-16 20:16:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 20:16:21,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:21,105 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:16:21,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:16:21,106 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:16:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1604099434, now seen corresponding path program 1 times [2022-11-16 20:16:21,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:16:21,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27188050] [2022-11-16 20:16:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:21,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:16:21,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:16:21,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200026677] [2022-11-16 20:16:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:21,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:16:21,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:16:21,172 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:16:21,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:16:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:21,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 20:16:21,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:16:21,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:21,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:16:21,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27188050] [2022-11-16 20:16:21,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:16:21,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200026677] [2022-11-16 20:16:21,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200026677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:21,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:21,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:16:21,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726991642] [2022-11-16 20:16:21,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:21,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:16:21,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:16:21,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:16:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:16:21,520 INFO L87 Difference]: Start difference. First operand 21 states and 25 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) [2022-11-16 20:16:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:21,575 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-16 20:16:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:16:21,576 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 [2022-11-16 20:16:21,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:21,577 INFO L225 Difference]: With dead ends: 27 [2022-11-16 20:16:21,577 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 20:16:21,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:16:21,580 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:21,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 45 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:16:21,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 20:16:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-11-16 20:16:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 20:16:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-16 20:16:21,590 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2022-11-16 20:16:21,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:21,591 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-16 20:16:21,591 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) [2022-11-16 20:16:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-16 20:16:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 20:16:21,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:21,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:16:21,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:21,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:16:21,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:16:21,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:21,802 INFO L85 PathProgramCache]: Analyzing trace with hash -874793495, now seen corresponding path program 1 times [2022-11-16 20:16:21,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:16:21,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195675565] [2022-11-16 20:16:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:21,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:16:21,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:16:21,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447098635] [2022-11-16 20:16:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:21,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:16:21,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:16:21,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:16:21,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:16:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:21,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:16:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:16:22,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:16:22,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:16:22,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195675565] [2022-11-16 20:16:22,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:16:22,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447098635] [2022-11-16 20:16:22,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447098635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:16:22,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:16:22,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:16:22,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111560600] [2022-11-16 20:16:22,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:16:22,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:16:22,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:16:22,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:16:22,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:16:22,069 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 20:16:22,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:16:22,156 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-11-16 20:16:22,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:16:22,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-11-16 20:16:22,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:16:22,158 INFO L225 Difference]: With dead ends: 45 [2022-11-16 20:16:22,158 INFO L226 Difference]: Without dead ends: 27 [2022-11-16 20:16:22,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:16:22,160 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:16:22,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:16:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-16 20:16:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-11-16 20:16:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 20:16:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-16 20:16:22,169 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 25 [2022-11-16 20:16:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:16:22,169 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-16 20:16:22,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 20:16:22,170 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-16 20:16:22,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 20:16:22,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:16:22,184 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:16:22,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:16:22,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:16:22,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:16:22,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:16:22,391 INFO L85 PathProgramCache]: Analyzing trace with hash -578077241, now seen corresponding path program 1 times [2022-11-16 20:16:22,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:16:22,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20490650] [2022-11-16 20:16:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:22,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:16:22,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:16:22,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270020146] [2022-11-16 20:16:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:16:22,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:16:22,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:16:22,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:16:22,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:16:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:16:22,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-16 20:16:22,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:16:22,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:16:22,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:22,903 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-16 20:16:22,915 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 [2022-11-16 20:16:22,924 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 [2022-11-16 20:16:22,938 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 [2022-11-16 20:16:23,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:23,749 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 171 treesize of output 162 [2022-11-16 20:16:23,777 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 162 treesize of output 154 [2022-11-16 20:16:23,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:23,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:23,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 197 [2022-11-16 20:16:23,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:23,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 17 [2022-11-16 20:16:23,890 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:16:24,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:24,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:24,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 17 [2022-11-16 20:16:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:16:25,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:16:45,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:16:45,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20490650] [2022-11-16 20:16:45,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:16:45,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270020146] [2022-11-16 20:16:45,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270020146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:16:45,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [520105617] [2022-11-16 20:16:45,561 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-16 20:16:45,563 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:16:45,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:16:45,582 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:16:45,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:16:45,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:45,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:45,847 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:16:45,848 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 [2022-11-16 20:16:45,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:45,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:45,886 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 55 treesize of output 65 [2022-11-16 20:16:45,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:45,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:45,948 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 [2022-11-16 20:16:46,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:46,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:46,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:46,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:46,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:46,253 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:16:46,254 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 405 treesize of output 403 [2022-11-16 20:16:46,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:46,483 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:16:46,484 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 42 treesize of output 25 [2022-11-16 20:16:46,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:47,029 INFO L321 Elim1Store]: treesize reduction 176, result has 51.6 percent of original size [2022-11-16 20:16:47,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 493 treesize of output 628 [2022-11-16 20:16:47,206 INFO L321 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2022-11-16 20:16:47,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 194 treesize of output 256 [2022-11-16 20:16:47,255 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 28 treesize of output 22 [2022-11-16 20:16:47,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:47,316 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:16:47,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 114 [2022-11-16 20:16:47,387 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:16:47,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:47,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 893 treesize of output 1542 [2022-11-16 20:16:47,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:47,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:47,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 627 treesize of output 567 [2022-11-16 20:16:48,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:48,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:48,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:48,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:48,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 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 783 treesize of output 2748 [2022-11-16 20:16:53,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:53,544 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 60 treesize of output 43 [2022-11-16 20:16:53,581 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:16:55,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:16:55,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:55,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 67 [2022-11-16 20:16:55,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:16:55,546 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 60 treesize of output 43 [2022-11-16 20:16:55,875 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:16:58,400 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-11-16 20:16:58,427 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 12 for LOIs [2022-11-16 20:16:58,430 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:17:43,787 WARN L233 SmtUtils]: Spent 31.57s on a formula simplification. DAG size of input: 928 DAG size of output: 415 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:18:39,172 WARN L233 SmtUtils]: Spent 36.07s on a formula simplification. DAG size of input: 925 DAG size of output: 411 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:18:42,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '566#(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)) (= (ite (= |ULTIMATE.start_main_~sum1~0#1| |ULTIMATE.start_main_~sum2~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#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) (<= 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 [2022-11-16 20:18:42,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:18:42,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:18:42,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-16 20:18:42,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885537079] [2022-11-16 20:18:42,336 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 20:18:42,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 20:18:42,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:18:42,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 20:18:42,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2296, Unknown=9, NotChecked=0, Total=2550 [2022-11-16 20:18:42,343 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 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) [2022-11-16 20:18:43,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:18:43,722 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-11-16 20:18:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 20:18:43,728 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 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) Word has length 26 [2022-11-16 20:18:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:18:43,731 INFO L225 Difference]: With dead ends: 48 [2022-11-16 20:18:43,732 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 20:18:43,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 125.7s TimeCoverageRelationStatistics Valid=313, Invalid=2758, Unknown=9, NotChecked=0, Total=3080 [2022-11-16 20:18:43,735 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:18:43,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 159 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 141 Unchecked, 0.3s Time] [2022-11-16 20:18:43,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 20:18:43,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-11-16 20:18:43,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 20:18:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-11-16 20:18:43,750 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 26 [2022-11-16 20:18:43,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:18:43,750 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-11-16 20:18:43,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 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) [2022-11-16 20:18:43,751 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-11-16 20:18:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 20:18:43,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:18:43,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:18:43,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:18:43,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:18:43,960 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:18:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:18:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash 30192041, now seen corresponding path program 2 times [2022-11-16 20:18:43,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:18:43,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522385314] [2022-11-16 20:18:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:18:43,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:18:44,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:18:44,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305168609] [2022-11-16 20:18:44,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:18:44,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:18:44,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:18:44,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:18:44,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:18:44,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:18:44,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:18:44,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:18:44,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:18:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:18:44,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:18:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:18:44,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:18:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522385314] [2022-11-16 20:18:44,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:18:44,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305168609] [2022-11-16 20:18:44,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305168609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:18:44,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1105806896] [2022-11-16 20:18:44,440 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-16 20:18:44,440 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:18:44,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:18:44,441 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:18:44,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:18:44,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:44,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:44,657 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:18:44,658 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 [2022-11-16 20:18:44,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:44,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:44,691 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 55 treesize of output 65 [2022-11-16 20:18:44,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:44,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:44,736 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 [2022-11-16 20:18:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:44,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:44,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:44,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:44,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:45,017 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:18:45,017 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 405 treesize of output 403 [2022-11-16 20:18:45,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:45,280 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:18:45,281 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 42 treesize of output 25 [2022-11-16 20:18:45,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:46,257 INFO L321 Elim1Store]: treesize reduction 176, result has 51.6 percent of original size [2022-11-16 20:18:46,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 493 treesize of output 628 [2022-11-16 20:18:46,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:46,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:46,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:46,885 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 346 treesize of output 598 [2022-11-16 20:18:46,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:46,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:46,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 141 [2022-11-16 20:18:46,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:46,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:46,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 130 [2022-11-16 20:18:46,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:46,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:47,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:47,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:47,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:47,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:47,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 565 [2022-11-16 20:18:47,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:47,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:47,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 121 [2022-11-16 20:18:47,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:47,107 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 55 treesize of output 35 [2022-11-16 20:18:47,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:18:47,199 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:18:51,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:51,451 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 49 treesize of output 28 [2022-11-16 20:18:51,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:51,647 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 49 treesize of output 28 [2022-11-16 20:18:53,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:53,497 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 49 treesize of output 28 [2022-11-16 20:18:53,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:18:53,650 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 49 treesize of output 28 [2022-11-16 20:18:55,828 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-11-16 20:18:55,855 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 12 for LOIs [2022-11-16 20:18:55,858 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:19:22,815 WARN L233 SmtUtils]: Spent 20.79s on a formula simplification. DAG size of input: 482 DAG size of output: 198 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:19:54,978 WARN L233 SmtUtils]: Spent 26.45s on a formula simplification. DAG size of input: 479 DAG size of output: 194 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:19:56,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '893#(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)) (= (ite (= |ULTIMATE.start_main_~sum1~0#1| |ULTIMATE.start_main_~sum2~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#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) (<= 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 [2022-11-16 20:19:56,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:19:56,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:19:56,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:19:56,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892439196] [2022-11-16 20:19:56,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:19:56,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:19:56,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:19:56,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:19:56,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=634, Unknown=5, NotChecked=0, Total=756 [2022-11-16 20:19:56,657 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:19:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:19:57,268 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-11-16 20:19:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:19:57,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 27 [2022-11-16 20:19:57,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:19:57,271 INFO L225 Difference]: With dead ends: 55 [2022-11-16 20:19:57,272 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 20:19:57,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 61.0s TimeCoverageRelationStatistics Valid=153, Invalid=898, Unknown=5, NotChecked=0, Total=1056 [2022-11-16 20:19:57,273 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:19:57,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 103 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:19:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 20:19:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-11-16 20:19:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 20:19:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-11-16 20:19:57,298 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 27 [2022-11-16 20:19:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:19:57,299 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-11-16 20:19:57,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:19:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-11-16 20:19:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 20:19:57,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:19:57,302 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:19:57,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:19:57,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:19:57,513 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:19:57,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:19:57,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1089524180, now seen corresponding path program 3 times [2022-11-16 20:19:57,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:19:57,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514694803] [2022-11-16 20:19:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:19:57,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:19:57,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:19:57,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169068756] [2022-11-16 20:19:57,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:19:57,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:19:57,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:19:57,535 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:19:57,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:19:57,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:19:57,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:19:57,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:19:57,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:19:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:19:57,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:19:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 20:19:57,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:19:57,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514694803] [2022-11-16 20:19:57,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:19:57,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169068756] [2022-11-16 20:19:57,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169068756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:19:57,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2113015758] [2022-11-16 20:19:57,907 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-16 20:19:57,908 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:19:57,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:19:57,908 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:19:57,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:19:57,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:19:57,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:19:58,089 INFO L321 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2022-11-16 20:19:58,090 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 55 treesize of output 79 [2022-11-16 20:19:58,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:19:58,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:19:58,278 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:19:58,279 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 [2022-11-16 20:19:58,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:19:58,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:19:58,322 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 [2022-11-16 20:19:58,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:19:58,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:19:58,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:19:58,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:19:58,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:19:58,654 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:19:58,654 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 405 treesize of output 403 [2022-11-16 20:19:58,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:19:58,867 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:19:58,868 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 42 treesize of output 25 [2022-11-16 20:19:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:19:59,437 INFO L321 Elim1Store]: treesize reduction 176, result has 51.6 percent of original size [2022-11-16 20:19:59,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 493 treesize of output 628 [2022-11-16 20:19:59,651 INFO L321 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2022-11-16 20:19:59,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 194 treesize of output 256 [2022-11-16 20:19:59,678 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 28 treesize of output 22 [2022-11-16 20:19:59,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:19:59,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:19:59,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 114 [2022-11-16 20:19:59,803 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:20:02,528 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:20:02,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:02,575 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 58 treesize of output 41 [2022-11-16 20:20:02,585 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 64 treesize of output 40 [2022-11-16 20:20:03,883 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:20:03,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:03,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:03,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 59 [2022-11-16 20:20:03,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:03,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:03,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 76 [2022-11-16 20:20:03,976 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 97 treesize of output 60 [2022-11-16 20:20:03,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:03,992 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 60 treesize of output 43 [2022-11-16 20:20:06,002 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-11-16 20:20:06,031 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 12 for LOIs [2022-11-16 20:20:06,033 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:20:52,950 WARN L233 SmtUtils]: Spent 40.62s on a formula simplification. DAG size of input: 583 DAG size of output: 240 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:21:35,322 WARN L233 SmtUtils]: Spent 35.09s on a formula simplification. DAG size of input: 580 DAG size of output: 195 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:21:36,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1287#(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)) (= (ite (= |ULTIMATE.start_main_~sum1~0#1| |ULTIMATE.start_main_~sum2~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#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) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:21:36,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:21:36,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:21:36,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:21:36,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359740858] [2022-11-16 20:21:36,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:36,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:21:36,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:21:36,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:21:36,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=637, Unknown=4, NotChecked=0, Total=756 [2022-11-16 20:21:36,994 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-16 20:21:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:37,297 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-11-16 20:21:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:21:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 35 [2022-11-16 20:21:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:37,299 INFO L225 Difference]: With dead ends: 62 [2022-11-16 20:21:37,300 INFO L226 Difference]: Without dead ends: 35 [2022-11-16 20:21:37,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 91.1s TimeCoverageRelationStatistics Valid=137, Invalid=789, Unknown=4, NotChecked=0, Total=930 [2022-11-16 20:21:37,301 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:37,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 71 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:21:37,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-16 20:21:37,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-11-16 20:21:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 20:21:37,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-16 20:21:37,311 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 35 [2022-11-16 20:21:37,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:37,311 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-16 20:21:37,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-16 20:21:37,312 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-16 20:21:37,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 20:21:37,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:37,313 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:37,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:21:37,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 20:21:37,516 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:21:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:37,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2056583306, now seen corresponding path program 4 times [2022-11-16 20:21:37,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:21:37,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185832051] [2022-11-16 20:21:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:21:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:21:37,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:21:37,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559314232] [2022-11-16 20:21:37,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:21:37,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:37,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:37,542 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:37,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b37c769-30de-40ee-bd67-b3d571158c73/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:21:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:21:37,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-16 20:21:37,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:37,865 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 [2022-11-16 20:21:37,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:37,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-16 20:21:37,969 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 [2022-11-16 20:21:37,975 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 [2022-11-16 20:21:37,990 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 [2022-11-16 20:21:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:38,110 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 48 treesize of output 39 [2022-11-16 20:21:38,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:38,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 176 [2022-11-16 20:21:38,984 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 171 treesize of output 161 [2022-11-16 20:21:39,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:39,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:39,049 INFO L321 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2022-11-16 20:21:39,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 212 [2022-11-16 20:21:39,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:39,206 INFO L321 Elim1Store]: treesize reduction 57, result has 31.3 percent of original size [2022-11-16 20:21:39,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 45 [2022-11-16 20:21:39,229 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:22:17,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:22:17,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 356 treesize of output 324 [2022-11-16 20:22:17,809 INFO L321 Elim1Store]: treesize reduction 14, result has 33.3 percent of original size [2022-11-16 20:22:17,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 24 [2022-11-16 20:22:18,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:22:18,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 419 treesize of output 412 [2022-11-16 20:22:20,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:22:20,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 35 case distinctions, treesize of input 514 treesize of output 906 [2022-11-16 20:22:22,914 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-16 20:23:41,253 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-16 20:26:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:26:59,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:27:41,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:27:41,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185832051] [2022-11-16 20:27:41,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:27:41,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559314232] [2022-11-16 20:27:41,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559314232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:27:41,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1074402370] [2022-11-16 20:27:41,165 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-16 20:27:41,165 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:27:41,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:27:41,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:27:41,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:27:41,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:41,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:41,348 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:27:41,348 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 [2022-11-16 20:27:41,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:41,369 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 55 treesize of output 65 [2022-11-16 20:27:41,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:41,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:41,406 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 [2022-11-16 20:27:41,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:41,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:41,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:27:41,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:27:41,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:27:41,655 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:27:41,656 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 405 treesize of output 403 [2022-11-16 20:27:41,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:27:41,908 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:27:41,908 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 42 treesize of output 25 [2022-11-16 20:27:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:42,367 INFO L321 Elim1Store]: treesize reduction 176, result has 51.6 percent of original size [2022-11-16 20:27:42,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 493 treesize of output 628 [2022-11-16 20:27:42,564 INFO L321 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2022-11-16 20:27:42,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 188 treesize of output 250 [2022-11-16 20:27:42,588 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 [2022-11-16 20:27:42,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:42,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:27:42,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 108 [2022-11-16 20:27:42,702 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:48,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:27:48,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:48,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 69 [2022-11-16 20:27:48,692 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 64 treesize of output 40 [2022-11-16 20:27:48,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:48,706 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 87 treesize of output 58 [2022-11-16 20:27:48,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:27:48,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:48,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 48 [2022-11-16 20:27:48,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:48,735 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 76 treesize of output 51 [2022-11-16 20:27:48,746 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 64 treesize of output 40 [2022-11-16 20:27:49,056 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,069 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,081 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,092 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,123 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,134 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,145 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,158 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,170 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,183 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,194 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,209 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,225 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,237 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:49,252 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,596 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,609 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,622 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,634 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,664 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,677 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,692 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,705 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,718 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,731 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,744 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,757 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,889 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,911 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:51,925 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:27:52,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:27:52,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:52,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 69 [2022-11-16 20:27:52,172 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 64 treesize of output 40 [2022-11-16 20:27:52,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:27:52,191 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 76 treesize of output 51 [2022-11-16 20:27:52,203 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 64 treesize of output 40 [2022-11-16 20:27:54,907 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-11-16 20:27:54,927 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 12 for LOIs [2022-11-16 20:27:54,930 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:29:42,808 WARN L233 SmtUtils]: Spent 1.08m on a formula simplification. DAG size of input: 1226 DAG size of output: 187 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)