./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array27_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array27_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e2a4cc1bd1815c470836bbbcc9d3775eac69b651b7231d974ae63a065851dd1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:16:43,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:16:43,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:16:43,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:16:43,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:16:43,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:16:43,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:16:43,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:16:43,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:16:43,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:16:43,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:16:43,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:16:43,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:16:43,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:16:43,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:16:43,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:16:43,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:16:43,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:16:43,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:16:43,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:16:43,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:16:43,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:16:43,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:16:43,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:16:43,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:16:43,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:16:43,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:16:43,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:16:43,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:16:43,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:16:43,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:16:43,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:16:43,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:16:43,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:16:43,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:16:43,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:16:43,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:16:43,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:16:43,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:16:43,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:16:43,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:16:43,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:16:43,113 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:16:43,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:16:43,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:16:43,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:16:43,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:16:43,115 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:16:43,116 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:16:43,116 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:16:43,116 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:16:43,116 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:16:43,117 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:16:43,117 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:16:43,117 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:16:43,117 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:16:43,117 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:16:43,118 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:16:43,118 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:16:43,118 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:16:43,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:16:43,119 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:16:43,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:16:43,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:16:43,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:16:43,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:16:43,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:16:43,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:16:43,121 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:16:43,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:16:43,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:16:43,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:16:43,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:16:43,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:16:43,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:16:43,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:16:43,123 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:16:43,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:16:43,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:16:43,124 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:16:43,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:16:43,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:16:43,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:16:43,124 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_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e2a4cc1bd1815c470836bbbcc9d3775eac69b651b7231d974ae63a065851dd1 [2022-11-22 00:16:43,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:16:43,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:16:43,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:16:43,383 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:16:43,384 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:16:43,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-patterns/array27_pattern.c [2022-11-22 00:16:46,582 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:16:46,834 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:16:46,835 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/sv-benchmarks/c/array-patterns/array27_pattern.c [2022-11-22 00:16:46,843 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/data/a53adf9ed/1cd876f9b0a64068bae484bb633314ba/FLAG2f67bdaff [2022-11-22 00:16:46,866 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/data/a53adf9ed/1cd876f9b0a64068bae484bb633314ba [2022-11-22 00:16:46,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:16:46,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:16:46,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:16:46,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:16:46,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:16:46,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:16:46" (1/1) ... [2022-11-22 00:16:46,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b59d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:46, skipping insertion in model container [2022-11-22 00:16:46,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:16:46" (1/1) ... [2022-11-22 00:16:46,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:16:46,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:16:47,121 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/sv-benchmarks/c/array-patterns/array27_pattern.c[1253,1266] [2022-11-22 00:16:47,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:16:47,162 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:16:47,179 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/sv-benchmarks/c/array-patterns/array27_pattern.c[1253,1266] [2022-11-22 00:16:47,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:16:47,220 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:16:47,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47 WrapperNode [2022-11-22 00:16:47,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:16:47,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:16:47,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:16:47,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:16:47,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47" (1/1) ... [2022-11-22 00:16:47,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47" (1/1) ... [2022-11-22 00:16:47,263 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2022-11-22 00:16:47,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:16:47,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:16:47,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:16:47,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:16:47,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47" (1/1) ... [2022-11-22 00:16:47,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47" (1/1) ... [2022-11-22 00:16:47,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47" (1/1) ... [2022-11-22 00:16:47,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47" (1/1) ... [2022-11-22 00:16:47,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47" (1/1) ... [2022-11-22 00:16:47,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47" (1/1) ... [2022-11-22 00:16:47,311 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47" (1/1) ... [2022-11-22 00:16:47,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47" (1/1) ... [2022-11-22 00:16:47,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:16:47,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:16:47,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:16:47,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:16:47,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47" (1/1) ... [2022-11-22 00:16:47,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:16:47,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:47,364 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:16:47,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:16:47,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:16:47,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:16:47,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 00:16:47,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:16:47,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:16:47,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:16:47,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:16:47,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:16:47,493 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:16:47,495 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:16:47,681 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:16:47,750 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:16:47,750 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 00:16:47,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:16:47 BoogieIcfgContainer [2022-11-22 00:16:47,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:16:47,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:16:47,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:16:47,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:16:47,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:16:46" (1/3) ... [2022-11-22 00:16:47,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cde519d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:16:47, skipping insertion in model container [2022-11-22 00:16:47,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:47" (2/3) ... [2022-11-22 00:16:47,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cde519d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:16:47, skipping insertion in model container [2022-11-22 00:16:47,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:16:47" (3/3) ... [2022-11-22 00:16:47,764 INFO L112 eAbstractionObserver]: Analyzing ICFG array27_pattern.c [2022-11-22 00:16:47,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:16:47,788 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:16:47,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:16:47,851 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;@7934f393, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:16:47,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:16:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 00:16:47,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:47,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 00:16:47,866 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:47,873 INFO L85 PathProgramCache]: Analyzing trace with hash 111032306, now seen corresponding path program 1 times [2022-11-22 00:16:47,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:47,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212171633] [2022-11-22 00:16:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:47,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:47,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:47,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350954260] [2022-11-22 00:16:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:47,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:47,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:47,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:48,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:16:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 00:16:48,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:48,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:16:48,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:48,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212171633] [2022-11-22 00:16:48,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:48,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350954260] [2022-11-22 00:16:48,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350954260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:48,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:48,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:16:48,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951766125] [2022-11-22 00:16:48,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:48,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:16:48,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:48,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:16:48,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:48,301 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:48,357 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2022-11-22 00:16:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:16:48,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 00:16:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:48,370 INFO L225 Difference]: With dead ends: 19 [2022-11-22 00:16:48,371 INFO L226 Difference]: Without dead ends: 10 [2022-11-22 00:16:48,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:48,378 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:48,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:16:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-22 00:16:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-11-22 00:16:48,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2022-11-22 00:16:48,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 5 [2022-11-22 00:16:48,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:48,421 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2022-11-22 00:16:48,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:48,422 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2022-11-22 00:16:48,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 00:16:48,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:48,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:48,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:48,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:48,635 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:48,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:48,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1329661337, now seen corresponding path program 1 times [2022-11-22 00:16:48,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:48,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713574878] [2022-11-22 00:16:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:48,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:48,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:48,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509229995] [2022-11-22 00:16:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:48,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:48,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:48,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:48,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:16:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:48,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:16:48,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:48,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:16:48,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:48,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713574878] [2022-11-22 00:16:48,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:48,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509229995] [2022-11-22 00:16:48,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509229995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:48,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:48,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:16:48,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646789245] [2022-11-22 00:16:48,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:48,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:16:48,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:48,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:16:48,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:16:48,784 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:48,828 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2022-11-22 00:16:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:16:48,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 00:16:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:48,829 INFO L225 Difference]: With dead ends: 18 [2022-11-22 00:16:48,829 INFO L226 Difference]: Without dead ends: 11 [2022-11-22 00:16:48,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:16:48,862 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:48,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 4 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:16:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-22 00:16:48,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-22 00:16:48,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:48,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-11-22 00:16:48,867 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2022-11-22 00:16:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:48,868 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-11-22 00:16:48,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:48,869 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-11-22 00:16:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 00:16:48,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:48,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:48,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 00:16:49,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:49,076 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:49,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1537908078, now seen corresponding path program 1 times [2022-11-22 00:16:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:49,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608532804] [2022-11-22 00:16:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:49,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:49,091 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:49,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941814399] [2022-11-22 00:16:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:49,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:49,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:49,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:49,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:16:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:49,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:16:49,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:16:49,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:16:49,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:49,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608532804] [2022-11-22 00:16:49,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:49,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941814399] [2022-11-22 00:16:49,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941814399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:49,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144442525] [2022-11-22 00:16:49,277 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 00:16:49,277 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:49,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:49,287 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:49,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:49,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:49,405 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-22 00:16:49,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-22 00:16:49,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:49,472 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:16:49,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:16:49,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:49,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:49,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 97 [2022-11-22 00:16:49,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:49,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:49,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 35 [2022-11-22 00:16:49,727 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 15 treesize of output 3 [2022-11-22 00:16:49,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:49,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:50,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:50,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:50,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:50,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:50,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-22 00:16:50,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:50,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:50,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:50,495 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:51,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '190#(and (<= |ULTIMATE.start_main_~sum~0#1| 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.offset|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (= (ite (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~row~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 00:16:51,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:16:51,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:16:51,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-11-22 00:16:51,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632272347] [2022-11-22 00:16:51,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:16:51,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:16:51,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:51,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:16:51,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-22 00:16:51,176 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:51,252 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2022-11-22 00:16:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:16:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 00:16:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:51,253 INFO L225 Difference]: With dead ends: 19 [2022-11-22 00:16:51,253 INFO L226 Difference]: Without dead ends: 16 [2022-11-22 00:16:51,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-22 00:16:51,254 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:51,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 4 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:16:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-22 00:16:51,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2022-11-22 00:16:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-22 00:16:51,259 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2022-11-22 00:16:51,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:51,260 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-22 00:16:51,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-22 00:16:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 00:16:51,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:51,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:51,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:51,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:51,462 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:51,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1643618289, now seen corresponding path program 1 times [2022-11-22 00:16:51,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:51,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661701041] [2022-11-22 00:16:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:51,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:51,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:51,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183859211] [2022-11-22 00:16:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:51,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:51,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:51,481 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:51,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:16:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:51,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-22 00:16:51,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:51,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:51,765 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-22 00:16:51,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-11-22 00:16:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:51,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:52,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:16:52,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 62 [2022-11-22 00:16:52,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 70 [2022-11-22 00:16:52,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:16:52,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 73 [2022-11-22 00:16:52,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:16:52,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 84 [2022-11-22 00:16:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:52,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:52,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661701041] [2022-11-22 00:16:52,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:52,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183859211] [2022-11-22 00:16:52,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183859211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:52,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075298706] [2022-11-22 00:16:52,440 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 00:16:52,440 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:52,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:52,441 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:52,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:52,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,504 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:16:52,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:16:52,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-22 00:16:52,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:52,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 97 [2022-11-22 00:16:52,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 40 [2022-11-22 00:16:52,673 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 15 treesize of output 3 [2022-11-22 00:16:52,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:52,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:52,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-22 00:16:52,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:52,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:52,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:53,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-22 00:16:53,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:53,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:53,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:53,245 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:54,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '329#(and (<= 0 |ULTIMATE.start_main_~column~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (= (ite (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 00:16:54,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:16:54,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:16:54,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2022-11-22 00:16:54,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542471180] [2022-11-22 00:16:54,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:16:54,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 00:16:54,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:54,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 00:16:54,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:16:54,012 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:55,604 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2022-11-22 00:16:55,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 00:16:55,605 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 00:16:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:55,607 INFO L225 Difference]: With dead ends: 46 [2022-11-22 00:16:55,607 INFO L226 Difference]: Without dead ends: 42 [2022-11-22 00:16:55,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 00:16:55,609 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:55,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 36 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:16:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-22 00:16:55,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2022-11-22 00:16:55,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2022-11-22 00:16:55,639 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 11 [2022-11-22 00:16:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:55,639 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2022-11-22 00:16:55,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2022-11-22 00:16:55,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 00:16:55,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:55,642 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:55,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:55,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:55,849 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash -595789752, now seen corresponding path program 2 times [2022-11-22 00:16:55,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:55,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891494877] [2022-11-22 00:16:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:55,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:55,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:55,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146016978] [2022-11-22 00:16:55,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:16:55,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:55,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:55,861 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:55,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:16:55,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:16:55,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:16:55,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:16:55,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:16:55,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:16:56,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:56,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891494877] [2022-11-22 00:16:56,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:56,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146016978] [2022-11-22 00:16:56,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146016978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:56,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754602941] [2022-11-22 00:16:56,022 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 00:16:56,023 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:56,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:56,023 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:56,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:56,071 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:16:56,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:16:56,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:56,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-22 00:16:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:56,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2022-11-22 00:16:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:56,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:56,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:56,327 INFO L321 Elim1Store]: treesize reduction 100, result has 25.4 percent of original size [2022-11-22 00:16:56,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 316 treesize of output 340 [2022-11-22 00:16:56,517 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-22 00:16:56,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 551 treesize of output 526 [2022-11-22 00:16:56,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:56,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 528 treesize of output 505 [2022-11-22 00:16:56,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:56,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:56,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:56,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:56,934 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-11-22 00:16:56,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 190 treesize of output 216 [2022-11-22 00:16:57,015 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-22 00:16:57,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 182 treesize of output 169 [2022-11-22 00:16:57,023 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 15 treesize of output 3 [2022-11-22 00:16:57,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:57,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:57,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-22 00:16:57,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:57,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:57,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:57,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:57,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-22 00:16:57,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:57,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:57,426 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:57,987 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '567#(and (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (= (ite (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 00:16:57,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:16:57,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:16:57,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-22 00:16:57,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90550023] [2022-11-22 00:16:57,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:16:57,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:16:57,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:57,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:16:57,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:16:57,989 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:58,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:58,180 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-11-22 00:16:58,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:16:58,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 00:16:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:58,182 INFO L225 Difference]: With dead ends: 51 [2022-11-22 00:16:58,182 INFO L226 Difference]: Without dead ends: 45 [2022-11-22 00:16:58,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-22 00:16:58,183 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:58,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 12 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:58,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-22 00:16:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2022-11-22 00:16:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2022-11-22 00:16:58,210 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 12 [2022-11-22 00:16:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:58,210 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2022-11-22 00:16:58,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2022-11-22 00:16:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 00:16:58,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:58,212 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:58,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:58,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:58,419 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:58,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1157329458, now seen corresponding path program 3 times [2022-11-22 00:16:58,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:58,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461259630] [2022-11-22 00:16:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:58,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:58,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:58,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148018520] [2022-11-22 00:16:58,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:16:58,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:58,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:58,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:58,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:16:58,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:16:58,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:16:58,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:16:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:16:58,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:16:58,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:58,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461259630] [2022-11-22 00:16:58,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:58,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148018520] [2022-11-22 00:16:58,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148018520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:58,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1146134999] [2022-11-22 00:16:58,581 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 00:16:58,581 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:58,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:58,582 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:58,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:58,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:58,698 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-22 00:16:58,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-22 00:16:58,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:58,781 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:16:58,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:16:58,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:58,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2022-11-22 00:16:58,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:58,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:58,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:59,011 INFO L321 Elim1Store]: treesize reduction 100, result has 25.4 percent of original size [2022-11-22 00:16:59,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 316 treesize of output 340 [2022-11-22 00:16:59,136 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-22 00:16:59,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 307 treesize of output 298 [2022-11-22 00:16:59,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:59,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 261 [2022-11-22 00:16:59,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:59,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:59,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:59,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:59,571 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-11-22 00:16:59,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 190 treesize of output 216 [2022-11-22 00:16:59,721 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-22 00:16:59,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 181 treesize of output 182 [2022-11-22 00:16:59,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2022-11-22 00:16:59,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:59,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:59,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 148 [2022-11-22 00:16:59,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:59,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:59,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:16:59,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:59,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:16:59,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:00,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:00,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-22 00:17:00,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:00,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:00,192 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:17:00,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '825#(and (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (= (ite (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 00:17:00,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:17:00,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:17:00,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-22 00:17:00,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369721961] [2022-11-22 00:17:00,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:17:00,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:17:00,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:17:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:17:00,656 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:00,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:00,861 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2022-11-22 00:17:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 00:17:00,862 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-22 00:17:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:00,865 INFO L225 Difference]: With dead ends: 73 [2022-11-22 00:17:00,865 INFO L226 Difference]: Without dead ends: 59 [2022-11-22 00:17:00,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:17:00,868 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:00,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 11 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:17:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-22 00:17:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2022-11-22 00:17:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 69 transitions. [2022-11-22 00:17:00,947 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 69 transitions. Word has length 14 [2022-11-22 00:17:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:00,948 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 69 transitions. [2022-11-22 00:17:00,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 69 transitions. [2022-11-22 00:17:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 00:17:00,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:00,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:00,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:17:01,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 00:17:01,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:01,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:01,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1862362712, now seen corresponding path program 4 times [2022-11-22 00:17:01,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:01,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216285576] [2022-11-22 00:17:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:01,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:01,162 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:17:01,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544608968] [2022-11-22 00:17:01,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:17:01,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:01,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:17:01,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:17:01,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:17:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:01,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:17:01,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:17:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:17:01,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:17:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:17:01,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:01,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216285576] [2022-11-22 00:17:01,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:17:01,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544608968] [2022-11-22 00:17:01,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544608968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:17:01,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [936999911] [2022-11-22 00:17:01,303 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 00:17:01,303 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:17:01,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:17:01,304 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:17:01,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:17:01,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:01,349 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:17:01,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:17:01,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:01,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-22 00:17:01,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:01,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:01,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 97 [2022-11-22 00:17:01,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:01,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:01,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 35 [2022-11-22 00:17:01,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-11-22 00:17:01,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:01,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:01,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:01,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:01,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:01,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:01,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:01,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-22 00:17:01,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:01,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:01,867 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:17:02,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1161#(and (<= 0 |ULTIMATE.start_main_~column~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (= (ite (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 00:17:02,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:17:02,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:17:02,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-22 00:17:02,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400500902] [2022-11-22 00:17:02,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:17:02,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:17:02,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:02,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:17:02,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:17:02,479 INFO L87 Difference]: Start difference. First operand 48 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:02,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:02,612 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2022-11-22 00:17:02,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:17:02,613 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 00:17:02,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:02,614 INFO L225 Difference]: With dead ends: 71 [2022-11-22 00:17:02,614 INFO L226 Difference]: Without dead ends: 40 [2022-11-22 00:17:02,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:17:02,615 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:02,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 12 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:17:02,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-22 00:17:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-11-22 00:17:02,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-11-22 00:17:02,637 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 15 [2022-11-22 00:17:02,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:02,637 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-11-22 00:17:02,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-11-22 00:17:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 00:17:02,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:02,638 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:02,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:17:02,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:02,844 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:02,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:02,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1619455393, now seen corresponding path program 5 times [2022-11-22 00:17:02,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:02,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147532469] [2022-11-22 00:17:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:02,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:02,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:17:02,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648766837] [2022-11-22 00:17:02,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:17:02,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:02,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:17:02,857 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:17:02,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:17:02,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:17:02,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:17:02,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:17:02,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:17:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 00:17:02,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:17:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 00:17:03,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147532469] [2022-11-22 00:17:03,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:17:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648766837] [2022-11-22 00:17:03,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648766837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:17:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942114040] [2022-11-22 00:17:03,020 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 00:17:03,020 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:17:03,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:17:03,021 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:17:03,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:17:03,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:03,090 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-22 00:17:03,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-22 00:17:03,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:03,170 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:17:03,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:17:03,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:03,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:03,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 97 [2022-11-22 00:17:03,223 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 00:17:03,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:03,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:03,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:03,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:03,430 INFO L321 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2022-11-22 00:17:03,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 405 treesize of output 428 [2022-11-22 00:17:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:03,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:03,488 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 345 treesize of output 345 [2022-11-22 00:17:03,722 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-22 00:17:03,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 660 treesize of output 639 [2022-11-22 00:17:03,750 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-22 00:17:03,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 633 treesize of output 586 [2022-11-22 00:17:04,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:04,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:04,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:04,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:04,390 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-11-22 00:17:04,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 190 treesize of output 216 [2022-11-22 00:17:04,430 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-22 00:17:04,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 50 [2022-11-22 00:17:04,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2022-11-22 00:17:04,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:04,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:04,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 18 [2022-11-22 00:17:04,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:04,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:04,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:04,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-22 00:17:04,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:04,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:04,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:04,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:04,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:04,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:04,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:17:05,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1464#(and (<= 0 |ULTIMATE.start_main_~column~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (= (ite (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 00:17:05,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:17:05,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:17:05,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-22 00:17:05,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858195405] [2022-11-22 00:17:05,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:17:05,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 00:17:05,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:05,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 00:17:05,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:17:05,451 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:05,616 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2022-11-22 00:17:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 00:17:05,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 00:17:05,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:05,617 INFO L225 Difference]: With dead ends: 45 [2022-11-22 00:17:05,618 INFO L226 Difference]: Without dead ends: 36 [2022-11-22 00:17:05,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:17:05,619 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:05,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:17:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-22 00:17:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-11-22 00:17:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-22 00:17:05,640 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 16 [2022-11-22 00:17:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:05,641 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-22 00:17:05,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-22 00:17:05,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 00:17:05,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:05,642 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:05,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:17:05,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:05,848 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1354969661, now seen corresponding path program 6 times [2022-11-22 00:17:05,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:05,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125646223] [2022-11-22 00:17:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:05,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:05,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:17:05,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027194268] [2022-11-22 00:17:05,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:17:05,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:05,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:17:05,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:17:05,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:17:05,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:17:05,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:17:05,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:17:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:17:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 00:17:05,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:17:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 00:17:06,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:06,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125646223] [2022-11-22 00:17:06,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:17:06,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027194268] [2022-11-22 00:17:06,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027194268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:17:06,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1874045776] [2022-11-22 00:17:06,043 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 00:17:06,043 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:17:06,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:17:06,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:17:06,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:17:06,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:06,119 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-22 00:17:06,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-22 00:17:06,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:06,203 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:17:06,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:17:06,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:06,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2022-11-22 00:17:06,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:06,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:06,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:06,373 INFO L321 Elim1Store]: treesize reduction 100, result has 25.4 percent of original size [2022-11-22 00:17:06,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 316 treesize of output 340 [2022-11-22 00:17:06,508 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-22 00:17:06,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 551 treesize of output 526 [2022-11-22 00:17:06,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:06,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 528 treesize of output 505 [2022-11-22 00:17:06,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:06,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:06,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:06,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:06,862 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-11-22 00:17:06,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 190 treesize of output 216 [2022-11-22 00:17:07,024 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-22 00:17:07,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 182 treesize of output 171 [2022-11-22 00:17:07,031 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 15 treesize of output 3 [2022-11-22 00:17:07,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:07,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:07,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:07,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:07,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:07,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:07,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:07,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:07,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:07,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 00:17:07,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:17:07,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1726#(and (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (= (ite (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 00:17:07,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:17:07,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:17:07,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-22 00:17:07,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561829272] [2022-11-22 00:17:07,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:17:07,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:17:07,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:07,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:17:07,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:17:07,817 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:07,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:07,939 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-11-22 00:17:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:17:07,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 00:17:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:07,941 INFO L225 Difference]: With dead ends: 36 [2022-11-22 00:17:07,941 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 00:17:07,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-11-22 00:17:07,942 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:07,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:17:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 00:17:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-11-22 00:17:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-22 00:17:07,960 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2022-11-22 00:17:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:07,964 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-22 00:17:07,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-22 00:17:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 00:17:07,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:07,965 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 00:17:07,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-22 00:17:08,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:08,170 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:08,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1293903980, now seen corresponding path program 7 times [2022-11-22 00:17:08,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:08,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968952049] [2022-11-22 00:17:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:08,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:08,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:17:08,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60963175] [2022-11-22 00:17:08,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:17:08,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:08,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:17:08,186 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:17:08,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffb3a2bc-e4bc-4de7-8b9c-026894b5fafa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:17:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-22 00:17:08,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:17:08,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-22 00:17:08,382 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 00:17:08,413 INFO L321 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2022-11-22 00:17:08,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2022-11-22 00:17:08,535 INFO L321 Elim1Store]: treesize reduction 79, result has 31.3 percent of original size [2022-11-22 00:17:08,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 57 [2022-11-22 00:17:08,613 INFO L321 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2022-11-22 00:17:08,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 49 [2022-11-22 00:17:09,134 INFO L321 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2022-11-22 00:17:09,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 18 [2022-11-22 00:17:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:09,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:17:10,186 INFO L321 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2022-11-22 00:17:10,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 28 [2022-11-22 00:17:11,608 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 00:17:12,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:12,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 52 [2022-11-22 00:17:12,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:12,157 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 1 case distinctions, treesize of input 18 treesize of output 17 [2022-11-22 00:17:12,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 466 treesize of output 448 [2022-11-22 00:17:12,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:12,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:12,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:12,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:12,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:12,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:12,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:12,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:12,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:12,246 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 32 treesize of output 26 [2022-11-22 00:17:12,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 234 [2022-11-22 00:17:23,165 WARN L233 SmtUtils]: Spent 10.82s on a formula simplification. DAG size of input: 47 DAG size of output: 22 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 00:17:23,166 INFO L321 Elim1Store]: treesize reduction 76, result has 32.7 percent of original size [2022-11-22 00:17:23,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1706005 treesize of output 1628206 [2022-11-22 00:17:54,750 WARN L233 SmtUtils]: Spent 17.35s on a formula simplification. DAG size of input: 1272 DAG size of output: 1272 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 00:18:15,843 WARN L233 SmtUtils]: Spent 14.90s on a formula simplification. DAG size of input: 1268 DAG size of output: 1267 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 00:18:58,780 WARN L233 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 855 DAG size of output: 855 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 00:19:05,939 WARN L233 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 855 DAG size of output: 855 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 00:19:12,420 WARN L233 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 853 DAG size of output: 853 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)