./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ncomp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ncomp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta --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 c3d1ff002f6e6cf179cc6204a129c133a3beda704ea9fff27ad69a10f5c1f33d --- 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-dbf71c6-m [2022-10-17 17:21:14,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:21:14,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:21:15,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:21:15,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:21:15,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:21:15,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:21:15,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:21:15,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:21:15,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:21:15,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:21:15,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:21:15,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:21:15,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:21:15,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:21:15,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:21:15,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:21:15,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:21:15,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:21:15,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:21:15,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:21:15,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:21:15,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:21:15,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:21:15,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:21:15,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:21:15,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:21:15,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:21:15,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:21:15,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:21:15,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:21:15,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:21:15,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:21:15,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:21:15,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:21:15,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:21:15,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:21:15,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:21:15,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:21:15,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:21:15,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:21:15,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:21:15,174 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:21:15,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:21:15,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:21:15,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:21:15,177 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:21:15,177 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:21:15,177 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:21:15,178 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:21:15,178 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:21:15,178 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:21:15,180 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:21:15,180 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:21:15,181 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:21:15,181 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:21:15,181 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:21:15,182 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:21:15,182 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:21:15,182 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:21:15,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:21:15,183 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:21:15,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:21:15,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:21:15,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:21:15,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:21:15,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:21:15,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:21:15,186 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:21:15,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:21:15,186 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:21:15,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:21:15,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:21:15,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:21:15,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:21:15,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:21:15,189 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:21:15,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:21:15,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:21:15,189 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:21:15,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:21:15,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:21:15,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:21:15,191 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_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3d1ff002f6e6cf179cc6204a129c133a3beda704ea9fff27ad69a10f5c1f33d [2022-10-17 17:21:15,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:21:15,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:21:15,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:21:15,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:21:15,565 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:21:15,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/array-fpi/ncomp.c [2022-10-17 17:21:15,660 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/data/41d01cb73/7022762856ef405f84a2c606a7cd1571/FLAG62d73574d [2022-10-17 17:21:16,204 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:21:16,205 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/sv-benchmarks/c/array-fpi/ncomp.c [2022-10-17 17:21:16,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/data/41d01cb73/7022762856ef405f84a2c606a7cd1571/FLAG62d73574d [2022-10-17 17:21:16,579 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/data/41d01cb73/7022762856ef405f84a2c606a7cd1571 [2022-10-17 17:21:16,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:21:16,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:21:16,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:21:16,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:21:16,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:21:16,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:21:16" (1/1) ... [2022-10-17 17:21:16,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64623ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:16, skipping insertion in model container [2022-10-17 17:21:16,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:21:16" (1/1) ... [2022-10-17 17:21:16,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:21:16,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:21:16,850 WARN L230 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_1c5c60e8-f993-481b-bb58-faf686689f6f/sv-benchmarks/c/array-fpi/ncomp.c[588,601] [2022-10-17 17:21:16,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:21:16,920 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:21:16,951 WARN L230 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_1c5c60e8-f993-481b-bb58-faf686689f6f/sv-benchmarks/c/array-fpi/ncomp.c[588,601] [2022-10-17 17:21:16,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:21:17,005 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:21:17,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17 WrapperNode [2022-10-17 17:21:17,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:21:17,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:21:17,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:21:17,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:21:17,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17" (1/1) ... [2022-10-17 17:21:17,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17" (1/1) ... [2022-10-17 17:21:17,054 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2022-10-17 17:21:17,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:21:17,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:21:17,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:21:17,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:21:17,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17" (1/1) ... [2022-10-17 17:21:17,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17" (1/1) ... [2022-10-17 17:21:17,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17" (1/1) ... [2022-10-17 17:21:17,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17" (1/1) ... [2022-10-17 17:21:17,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17" (1/1) ... [2022-10-17 17:21:17,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17" (1/1) ... [2022-10-17 17:21:17,086 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17" (1/1) ... [2022-10-17 17:21:17,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17" (1/1) ... [2022-10-17 17:21:17,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:21:17,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:21:17,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:21:17,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:21:17,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17" (1/1) ... [2022-10-17 17:21:17,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:21:17,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:17,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:21:17,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:21:17,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:21:17,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:21:17,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:21:17,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:21:17,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:21:17,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:21:17,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:21:17,281 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:21:17,283 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:21:17,535 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:21:17,668 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:21:17,669 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-17 17:21:17,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:21:17 BoogieIcfgContainer [2022-10-17 17:21:17,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:21:17,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:21:17,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:21:17,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:21:17,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:21:16" (1/3) ... [2022-10-17 17:21:17,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e62f086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:21:17, skipping insertion in model container [2022-10-17 17:21:17,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:17" (2/3) ... [2022-10-17 17:21:17,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e62f086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:21:17, skipping insertion in model container [2022-10-17 17:21:17,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:21:17" (3/3) ... [2022-10-17 17:21:17,706 INFO L112 eAbstractionObserver]: Analyzing ICFG ncomp.c [2022-10-17 17:21:17,730 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:21:17,730 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:21:17,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:21:17,820 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;@6fe2f356, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:21:17,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:21:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:17,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:21:17,830 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:17,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:17,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:17,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1654620546, now seen corresponding path program 1 times [2022-10-17 17:21:17,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:17,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269851033] [2022-10-17 17:21:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:17,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:18,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:21:18,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847470795] [2022-10-17 17:21:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:18,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:18,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:18,020 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:18,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:21:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:18,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 17:21:18,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:18,513 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-10-17 17:21:18,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2022-10-17 17:21:18,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:21:18,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:21:18,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:21:18,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:18,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:18,933 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-10-17 17:21:18,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 97 [2022-10-17 17:21:19,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:21:19,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:19,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:19,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:19,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 74 [2022-10-17 17:21:19,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:21:19,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 5 [2022-10-17 17:21:19,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:21:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:19,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:21:19,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:19,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269851033] [2022-10-17 17:21:19,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:21:19,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847470795] [2022-10-17 17:21:19,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847470795] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:19,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:19,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:21:19,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067950980] [2022-10-17 17:21:19,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:19,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:21:19,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:19,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:21:19,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:21:19,675 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:19,853 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-10-17 17:21:19,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:21:19,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-17 17:21:19,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:19,867 INFO L225 Difference]: With dead ends: 37 [2022-10-17 17:21:19,867 INFO L226 Difference]: Without dead ends: 22 [2022-10-17 17:21:19,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:21:19,875 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:19,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 17 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-10-17 17:21:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2022-10-17 17:21:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2022-10-17 17:21:19,919 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 8 [2022-10-17 17:21:19,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:19,920 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2022-10-17 17:21:19,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2022-10-17 17:21:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:21:19,921 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:19,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:19,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:21:20,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 17:21:20,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash -421812701, now seen corresponding path program 1 times [2022-10-17 17:21:20,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:20,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222179820] [2022-10-17 17:21:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:20,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:20,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:21:20,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262339796] [2022-10-17 17:21:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:20,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:20,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:20,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:20,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:21:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:20,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:21:20,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:20,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:21:20,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:20,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222179820] [2022-10-17 17:21:20,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:21:20,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262339796] [2022-10-17 17:21:20,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262339796] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:20,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:20,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:21:20,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933063522] [2022-10-17 17:21:20,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:20,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:21:20,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:21:20,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:21:20,396 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:20,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:20,500 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2022-10-17 17:21:20,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:21:20,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 17:21:20,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:20,504 INFO L225 Difference]: With dead ends: 30 [2022-10-17 17:21:20,505 INFO L226 Difference]: Without dead ends: 23 [2022-10-17 17:21:20,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:21:20,512 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:20,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-10-17 17:21:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2022-10-17 17:21:20,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-10-17 17:21:20,528 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2022-10-17 17:21:20,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:20,529 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-10-17 17:21:20,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:20,529 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-10-17 17:21:20,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:21:20,530 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:20,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:20,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:21:20,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:20,732 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:20,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:20,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1222239637, now seen corresponding path program 1 times [2022-10-17 17:21:20,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:20,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106174014] [2022-10-17 17:21:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:20,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:20,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:21:20,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845984599] [2022-10-17 17:21:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:20,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:20,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:20,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:20,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:21:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:20,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:21:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:20,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:21:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:20,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:20,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106174014] [2022-10-17 17:21:20,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:21:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845984599] [2022-10-17 17:21:20,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845984599] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:21:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716936295] [2022-10-17 17:21:21,012 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:21:21,012 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:21:21,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:21:21,030 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:21:21,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:21:21,361 INFO L356 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2022-10-17 17:21:21,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2022-10-17 17:21:21,542 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-10-17 17:21:21,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 74 treesize of output 63 [2022-10-17 17:21:21,882 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-10-17 17:21:21,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-10-17 17:21:22,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:22,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:22,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 106 [2022-10-17 17:21:22,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:22,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:22,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:22,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:22,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:22,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:22,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:22,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:22,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:22,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:22,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:22,442 INFO L356 Elim1Store]: treesize reduction 316, result has 0.3 percent of original size [2022-10-17 17:21:22,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 552 treesize of output 526 [2022-10-17 17:21:22,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:22,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:21:22,674 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:21:23,140 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '277#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) |ULTIMATE.start_main_#t~mem17#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= ~N~0 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:21:23,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:21:23,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:21:23,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-10-17 17:21:23,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477431967] [2022-10-17 17:21:23,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:21:23,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:21:23,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:21:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:21:23,146 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:23,292 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-10-17 17:21:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:21:23,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 17:21:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:23,294 INFO L225 Difference]: With dead ends: 33 [2022-10-17 17:21:23,294 INFO L226 Difference]: Without dead ends: 27 [2022-10-17 17:21:23,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-10-17 17:21:23,296 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:23,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:23,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-17 17:21:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-10-17 17:21:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-10-17 17:21:23,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-10-17 17:21:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:23,318 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-10-17 17:21:23,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-10-17 17:21:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:21:23,319 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:23,320 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:23,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:21:23,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:23,534 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:23,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:23,535 INFO L85 PathProgramCache]: Analyzing trace with hash -533842186, now seen corresponding path program 1 times [2022-10-17 17:21:23,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:23,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650387895] [2022-10-17 17:21:23,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:23,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:23,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:21:23,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322738359] [2022-10-17 17:21:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:23,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:23,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:23,570 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:23,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:21:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:23,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:21:23,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:23,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:21:23,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:23,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650387895] [2022-10-17 17:21:23,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:21:23,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322738359] [2022-10-17 17:21:23,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322738359] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:23,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:23,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:21:23,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361795475] [2022-10-17 17:21:23,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:23,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:21:23,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:23,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:21:23,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:21:23,715 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:23,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:23,811 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-10-17 17:21:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:21:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 17:21:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:23,814 INFO L225 Difference]: With dead ends: 29 [2022-10-17 17:21:23,815 INFO L226 Difference]: Without dead ends: 18 [2022-10-17 17:21:23,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:21:23,818 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:23,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-10-17 17:21:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-10-17 17:21:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-10-17 17:21:23,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 11 [2022-10-17 17:21:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:23,833 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-10-17 17:21:23,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-10-17 17:21:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:21:23,834 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:23,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:23,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-10-17 17:21:24,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:24,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1096726144, now seen corresponding path program 1 times [2022-10-17 17:21:24,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:24,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249757866] [2022-10-17 17:21:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:24,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:24,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:21:24,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505802882] [2022-10-17 17:21:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:24,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:24,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:24,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:24,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:21:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:24,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 34 conjunts are in the unsatisfiable core [2022-10-17 17:21:24,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:24,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-10-17 17:21:24,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:24,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:24,376 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 17:21:24,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-10-17 17:21:24,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:21:24,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 17:21:24,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 17:21:24,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:24,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 17:21:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:24,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:21:24,783 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_267 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_267) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) c_~N~0)) is different from false [2022-10-17 17:21:24,796 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_267 (Array Int Int)) (v_ArrVal_266 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_266) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_267) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) c_~N~0)) is different from false [2022-10-17 17:21:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-10-17 17:21:24,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:24,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249757866] [2022-10-17 17:21:24,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:21:24,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505802882] [2022-10-17 17:21:24,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505802882] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:21:24,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1297829378] [2022-10-17 17:21:24,818 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:21:24,819 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:21:24,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:21:24,819 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:21:24,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:21:25,123 INFO L356 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2022-10-17 17:21:25,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2022-10-17 17:21:25,277 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-10-17 17:21:25,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 74 treesize of output 63 [2022-10-17 17:21:25,645 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-10-17 17:21:25,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-10-17 17:21:25,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:25,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 106 [2022-10-17 17:21:25,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:25,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:25,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:25,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:26,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:26,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:26,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,074 INFO L356 Elim1Store]: treesize reduction 316, result has 0.3 percent of original size [2022-10-17 17:21:26,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 581 treesize of output 528 [2022-10-17 17:21:26,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:21:26,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:26,349 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:26,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-10-17 17:21:26,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:26,416 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:26,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:26,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:26,471 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:26,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:26,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,509 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:26,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-10-17 17:21:26,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:26,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:26,720 INFO L356 Elim1Store]: treesize reduction 253, result has 10.3 percent of original size [2022-10-17 17:21:26,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 152 treesize of output 183 [2022-10-17 17:21:26,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:26,808 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:26,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:26,831 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:21:27,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '539#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) |ULTIMATE.start_main_#t~mem17#1|) 1 0)) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:21:27,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:21:27,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:21:27,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-10-17 17:21:27,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25481893] [2022-10-17 17:21:27,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:21:27,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 17:21:27,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 17:21:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=197, Unknown=2, NotChecked=58, Total=306 [2022-10-17 17:21:27,380 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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) [2022-10-17 17:21:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:27,693 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-10-17 17:21:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:21:27,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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 11 [2022-10-17 17:21:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:27,695 INFO L225 Difference]: With dead ends: 29 [2022-10-17 17:21:27,695 INFO L226 Difference]: Without dead ends: 27 [2022-10-17 17:21:27,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=301, Unknown=2, NotChecked=74, Total=462 [2022-10-17 17:21:27,696 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:27,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 33 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-10-17 17:21:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-17 17:21:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2022-10-17 17:21:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-10-17 17:21:27,702 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2022-10-17 17:21:27,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:27,703 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-10-17 17:21:27,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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) [2022-10-17 17:21:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-10-17 17:21:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:21:27,707 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:27,707 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:27,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:21:27,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:27,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:27,925 INFO L85 PathProgramCache]: Analyzing trace with hash -369512678, now seen corresponding path program 2 times [2022-10-17 17:21:27,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:27,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983809729] [2022-10-17 17:21:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:27,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:28,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:21:28,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586968182] [2022-10-17 17:21:28,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:21:28,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:28,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:28,016 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:28,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:21:28,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:21:28,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:21:28,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:21:28,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:21:28,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:21:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:21:28,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:28,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983809729] [2022-10-17 17:21:28,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:21:28,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586968182] [2022-10-17 17:21:28,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586968182] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:21:28,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306273904] [2022-10-17 17:21:28,232 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:21:28,232 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:21:28,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:21:28,233 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:21:28,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:21:28,480 INFO L356 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2022-10-17 17:21:28,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2022-10-17 17:21:28,617 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-10-17 17:21:28,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 74 treesize of output 63 [2022-10-17 17:21:28,932 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-10-17 17:21:28,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-10-17 17:21:29,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-10-17 17:21:29,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:29,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:29,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:29,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,421 INFO L356 Elim1Store]: treesize reduction 254, result has 10.2 percent of original size [2022-10-17 17:21:29,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 516 treesize of output 527 [2022-10-17 17:21:29,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:21:29,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,691 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:29,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-10-17 17:21:29,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:29,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:29,876 INFO L356 Elim1Store]: treesize reduction 248, result has 12.1 percent of original size [2022-10-17 17:21:29,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 152 treesize of output 188 [2022-10-17 17:21:29,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:29,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:30,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:30,005 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:30,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:30,031 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:30,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-10-17 17:21:30,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:30,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:30,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:30,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:30,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:30,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:30,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:30,212 INFO L356 Elim1Store]: treesize reduction 248, result has 12.1 percent of original size [2022-10-17 17:21:30,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 152 treesize of output 188 [2022-10-17 17:21:30,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:30,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:30,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:30,325 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:30,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:30,350 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:21:30,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '695#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) |ULTIMATE.start_main_#t~mem17#1|) 1 0)) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:21:30,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:21:30,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:21:30,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-10-17 17:21:30,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658736359] [2022-10-17 17:21:30,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:21:30,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:21:30,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:21:30,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:21:30,758 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2022-10-17 17:21:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:30,937 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-10-17 17:21:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:21:30,938 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 [2022-10-17 17:21:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:30,939 INFO L225 Difference]: With dead ends: 48 [2022-10-17 17:21:30,939 INFO L226 Difference]: Without dead ends: 37 [2022-10-17 17:21:30,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:21:30,940 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:30,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 15 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-17 17:21:30,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2022-10-17 17:21:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-10-17 17:21:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-10-17 17:21:30,949 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2022-10-17 17:21:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:30,949 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-10-17 17:21:30,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2022-10-17 17:21:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-10-17 17:21:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:21:30,950 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:30,950 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:30,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:21:31,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:31,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash 757463352, now seen corresponding path program 1 times [2022-10-17 17:21:31,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:31,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668239216] [2022-10-17 17:21:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:31,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:21:31,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476434508] [2022-10-17 17:21:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:31,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:31,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:31,214 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:31,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 17:21:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:31,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 47 conjunts are in the unsatisfiable core [2022-10-17 17:21:31,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:31,474 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:31,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-17 17:21:31,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:31,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:31,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:31,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-10-17 17:21:31,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:21:31,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:21:31,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-10-17 17:21:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:31,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-10-17 17:21:31,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-10-17 17:21:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:31,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:21:32,730 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_403 (Array Int Int)) (v_ArrVal_404 Int)) (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_403))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|))) (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse0 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_404)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) (+ c_~N~0 1))) is different from false [2022-10-17 17:21:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-10-17 17:21:32,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:32,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668239216] [2022-10-17 17:21:32,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:21:32,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476434508] [2022-10-17 17:21:32,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476434508] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:21:32,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2014479255] [2022-10-17 17:21:32,767 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-10-17 17:21:32,767 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:21:32,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:21:32,768 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:21:32,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:21:32,995 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-10-17 17:21:32,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-10-17 17:21:33,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2022-10-17 17:21:33,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-10-17 17:21:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-10-17 17:21:33,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:33,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:33,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:33,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,365 INFO L356 Elim1Store]: treesize reduction 254, result has 10.2 percent of original size [2022-10-17 17:21:33,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 516 treesize of output 527 [2022-10-17 17:21:33,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:21:33,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:33,670 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:33,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:33,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:33,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:33,758 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:21:33,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 197 [2022-10-17 17:21:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:33,824 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:33,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:33,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:33,902 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:33,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-10-17 17:21:33,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:33,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:33,970 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:33,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:34,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:34,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:34,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:34,021 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:34,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:34,122 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:21:34,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '912#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) |ULTIMATE.start_main_#t~mem17#1|) 1 0)) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:21:34,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:21:34,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:21:34,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2022-10-17 17:21:34,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324345218] [2022-10-17 17:21:34,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:21:34,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 17:21:34,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:34,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 17:21:34,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=393, Unknown=1, NotChecked=40, Total=506 [2022-10-17 17:21:34,818 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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) [2022-10-17 17:21:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:35,290 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-10-17 17:21:35,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 17:21:35,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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 [2022-10-17 17:21:35,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:35,291 INFO L225 Difference]: With dead ends: 31 [2022-10-17 17:21:35,291 INFO L226 Difference]: Without dead ends: 29 [2022-10-17 17:21:35,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=508, Unknown=1, NotChecked=46, Total=650 [2022-10-17 17:21:35,293 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:35,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-10-17 17:21:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-10-17 17:21:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-10-17 17:21:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-10-17 17:21:35,302 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 14 [2022-10-17 17:21:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:35,302 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-10-17 17:21:35,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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) [2022-10-17 17:21:35,302 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-10-17 17:21:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:21:35,303 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:35,303 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:35,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 17:21:35,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:35,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:35,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:35,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1801942402, now seen corresponding path program 3 times [2022-10-17 17:21:35,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:35,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532406507] [2022-10-17 17:21:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:35,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:35,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:21:35,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561913702] [2022-10-17 17:21:35,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:21:35,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:35,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:35,612 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:35,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 17:21:35,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:21:35,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:21:35,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 47 conjunts are in the unsatisfiable core [2022-10-17 17:21:35,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:36,049 INFO L356 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-10-17 17:21:36,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2022-10-17 17:21:36,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:21:36,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:21:36,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-10-17 17:21:36,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:36,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 11 [2022-10-17 17:21:36,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:21:36,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:36,635 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-10-17 17:21:36,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 254 treesize of output 225 [2022-10-17 17:21:36,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:21:36,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:21:36,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:21:37,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:37,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 11 [2022-10-17 17:21:37,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:21:37,176 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:37,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-10-17 17:21:37,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:37,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:37,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:37,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2022-10-17 17:21:37,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:21:37,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-10-17 17:21:37,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 17:21:37,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 17:21:37,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 17:21:37,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 65 treesize of output 58 [2022-10-17 17:21:37,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:37,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:37,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-10-17 17:21:37,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:37,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 17:21:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:21:37,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:21:37,842 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_492 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_492) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|))) is different from false [2022-10-17 17:21:37,874 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_490 (Array Int Int)) (v_ArrVal_492 (Array Int Int))) (= c_~N~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_490) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_492) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|))) is different from false [2022-10-17 17:21:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-10-17 17:21:37,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532406507] [2022-10-17 17:21:37,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:21:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561913702] [2022-10-17 17:21:37,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561913702] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:21:37,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724730032] [2022-10-17 17:21:37,908 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:21:37,908 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:21:37,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:21:37,909 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:21:37,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:21:38,128 INFO L356 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2022-10-17 17:21:38,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2022-10-17 17:21:38,353 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-10-17 17:21:38,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-10-17 17:21:38,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-10-17 17:21:38,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:38,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 106 [2022-10-17 17:21:38,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:38,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:38,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:38,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,714 INFO L356 Elim1Store]: treesize reduction 316, result has 0.3 percent of original size [2022-10-17 17:21:38,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 552 treesize of output 526 [2022-10-17 17:21:38,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:21:38,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:38,956 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:38,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:39,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:39,017 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:39,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:39,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:39,066 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:39,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:39,096 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:39,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:39,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:39,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:39,184 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:21:39,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 197 [2022-10-17 17:21:39,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:39,254 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:39,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:39,275 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:21:39,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1113#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) |ULTIMATE.start_main_#t~mem17#1|) 1 0)) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:21:39,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:21:39,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:21:39,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-10-17 17:21:39,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680248502] [2022-10-17 17:21:39,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:21:39,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 17:21:39,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:39,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 17:21:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=279, Unknown=2, NotChecked=70, Total=420 [2022-10-17 17:21:39,822 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 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) [2022-10-17 17:21:40,117 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_492 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_492) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|))) (forall ((v_ArrVal_490 (Array Int Int)) (v_ArrVal_492 (Array Int Int))) (= c_~N~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_490) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_492) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) is different from false [2022-10-17 17:21:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:40,887 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2022-10-17 17:21:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-10-17 17:21:40,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 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 [2022-10-17 17:21:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:40,893 INFO L225 Difference]: With dead ends: 99 [2022-10-17 17:21:40,893 INFO L226 Difference]: Without dead ends: 97 [2022-10-17 17:21:40,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=285, Invalid=1200, Unknown=9, NotChecked=228, Total=1722 [2022-10-17 17:21:40,895 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 126 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:40,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 60 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 100 Invalid, 0 Unknown, 160 Unchecked, 0.2s Time] [2022-10-17 17:21:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-10-17 17:21:40,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 34. [2022-10-17 17:21:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 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) [2022-10-17 17:21:40,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-10-17 17:21:40,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 14 [2022-10-17 17:21:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:40,934 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-10-17 17:21:40,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 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) [2022-10-17 17:21:40,934 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-10-17 17:21:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:21:40,936 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:40,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:40,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 17:21:41,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:41,152 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1575386977, now seen corresponding path program 2 times [2022-10-17 17:21:41,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:41,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177704404] [2022-10-17 17:21:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:41,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:41,207 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:21:41,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728417956] [2022-10-17 17:21:41,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:21:41,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:41,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:41,227 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:41,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 17:21:41,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:21:41,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:21:41,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:21:41,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 17:21:41,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:21:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 17:21:41,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:41,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177704404] [2022-10-17 17:21:41,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:21:41,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728417956] [2022-10-17 17:21:41,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728417956] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:21:41,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1828485509] [2022-10-17 17:21:41,410 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-10-17 17:21:41,410 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:21:41,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:21:41,410 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:21:41,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:21:41,617 INFO L356 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2022-10-17 17:21:41,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2022-10-17 17:21:41,766 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-10-17 17:21:41,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 74 treesize of output 63 [2022-10-17 17:21:42,109 INFO L356 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-10-17 17:21:42,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-10-17 17:21:42,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:42,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 106 [2022-10-17 17:21:42,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:42,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:42,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:42,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,436 INFO L356 Elim1Store]: treesize reduction 316, result has 0.3 percent of original size [2022-10-17 17:21:42,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 581 treesize of output 528 [2022-10-17 17:21:42,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-10-17 17:21:42,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:42,615 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:42,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:42,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:42,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:42,714 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:21:42,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 197 [2022-10-17 17:21:42,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:42,785 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:42,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:42,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:42,846 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:42,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-10-17 17:21:42,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:42,912 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:42,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:42,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:42,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:42,967 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-17 17:21:42,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 93 [2022-10-17 17:21:43,072 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:21:43,512 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1462#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) |ULTIMATE.start_main_#t~mem17#1|) 1 0)) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-10-17 17:21:43,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:21:43,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:21:43,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-10-17 17:21:43,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139905002] [2022-10-17 17:21:43,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:21:43,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:21:43,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:43,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:21:43,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:21:43,515 INFO L87 Difference]: Start difference. First operand 34 states and 45 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) [2022-10-17 17:21:43,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:43,795 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-10-17 17:21:43,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 17:21:43,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-17 17:21:43,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:43,797 INFO L225 Difference]: With dead ends: 59 [2022-10-17 17:21:43,797 INFO L226 Difference]: Without dead ends: 50 [2022-10-17 17:21:43,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-10-17 17:21:43,798 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:43,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:21:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-17 17:21:43,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2022-10-17 17:21:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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) [2022-10-17 17:21:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-10-17 17:21:43,812 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 15 [2022-10-17 17:21:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:43,813 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-10-17 17:21:43,813 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) [2022-10-17 17:21:43,813 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-10-17 17:21:43,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 17:21:43,814 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:43,815 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:43,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 17:21:44,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:44,028 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:21:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:44,028 INFO L85 PathProgramCache]: Analyzing trace with hash 529715266, now seen corresponding path program 4 times [2022-10-17 17:21:44,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:44,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114220724] [2022-10-17 17:21:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:44,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:44,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:21:44,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920239032] [2022-10-17 17:21:44,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 17:21:44,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:44,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:44,101 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:44,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5c60e8-f993-481b-bb58-faf686689f6f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 17:21:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:44,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 17:21:44,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:21:44,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:21:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:21:44,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:44,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114220724] [2022-10-17 17:21:44,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:21:44,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920239032] [2022-10-17 17:21:44,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920239032] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:21:44,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997105924] [2022-10-17 17:21:44,355 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:21:44,355 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:21:44,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:21:44,356 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:21:44,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:21:44,552 INFO L356 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2022-10-17 17:21:44,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2022-10-17 17:21:44,649 INFO L356 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-10-17 17:21:44,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 74 treesize of output 63