./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh --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 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 --- 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-2329fc7 [2022-12-14 15:46:08,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:46:08,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:46:08,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:46:08,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:46:08,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:46:08,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:46:08,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:46:08,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:46:08,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:46:08,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:46:08,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:46:08,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:46:08,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:46:08,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:46:08,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:46:08,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:46:08,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:46:08,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:46:08,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:46:08,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:46:08,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:46:08,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:46:08,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:46:09,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:46:09,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:46:09,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:46:09,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:46:09,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:46:09,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:46:09,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:46:09,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:46:09,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:46:09,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:46:09,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:46:09,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:46:09,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:46:09,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:46:09,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:46:09,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:46:09,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:46:09,008 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:46:09,024 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:46:09,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:46:09,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:46:09,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:46:09,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:46:09,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:46:09,025 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:46:09,025 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:46:09,026 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:46:09,026 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:46:09,026 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:46:09,026 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:46:09,026 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:46:09,026 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:46:09,026 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:46:09,026 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:46:09,026 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:46:09,026 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:46:09,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:46:09,027 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:46:09,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:46:09,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:46:09,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:46:09,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:46:09,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:46:09,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:46:09,028 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:46:09,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:46:09,028 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:46:09,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:46:09,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:46:09,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:46:09,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:46:09,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:46:09,028 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:46:09,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:46:09,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:46:09,029 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:46:09,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:46:09,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:46:09,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:46:09,029 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_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 [2022-12-14 15:46:09,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:46:09,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:46:09,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:46:09,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:46:09,237 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:46:09,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2022-12-14 15:46:11,748 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:46:11,908 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:46:11,908 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2022-12-14 15:46:11,913 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/data/c441d5c0b/5d5d169900f5441fa47119c1ee0d4dbb/FLAGf9be8de31 [2022-12-14 15:46:11,923 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/data/c441d5c0b/5d5d169900f5441fa47119c1ee0d4dbb [2022-12-14 15:46:11,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:46:11,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:46:11,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:46:11,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:46:11,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:46:11,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:46:11" (1/1) ... [2022-12-14 15:46:11,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dab14dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:11, skipping insertion in model container [2022-12-14 15:46:11,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:46:11" (1/1) ... [2022-12-14 15:46:11,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:46:11,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:46:12,093 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i[816,829] [2022-12-14 15:46:12,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:46:12,119 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:46:12,130 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i[816,829] [2022-12-14 15:46:12,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:46:12,153 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:46:12,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12 WrapperNode [2022-12-14 15:46:12,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:46:12,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:46:12,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:46:12,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:46:12,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12" (1/1) ... [2022-12-14 15:46:12,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12" (1/1) ... [2022-12-14 15:46:12,188 INFO L138 Inliner]: procedures = 16, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 131 [2022-12-14 15:46:12,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:46:12,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:46:12,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:46:12,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:46:12,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12" (1/1) ... [2022-12-14 15:46:12,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12" (1/1) ... [2022-12-14 15:46:12,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12" (1/1) ... [2022-12-14 15:46:12,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12" (1/1) ... [2022-12-14 15:46:12,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12" (1/1) ... [2022-12-14 15:46:12,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12" (1/1) ... [2022-12-14 15:46:12,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12" (1/1) ... [2022-12-14 15:46:12,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12" (1/1) ... [2022-12-14 15:46:12,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:46:12,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:46:12,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:46:12,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:46:12,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12" (1/1) ... [2022-12-14 15:46:12,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:46:12,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:46:12,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:46:12,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:46:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:46:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:46:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 15:46:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 15:46:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:46:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:46:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 15:46:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 15:46:12,316 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:46:12,317 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:46:12,449 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:46:12,482 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:46:12,483 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-12-14 15:46:12,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:46:12 BoogieIcfgContainer [2022-12-14 15:46:12,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:46:12,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:46:12,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:46:12,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:46:12,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:46:11" (1/3) ... [2022-12-14 15:46:12,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551d3980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:46:12, skipping insertion in model container [2022-12-14 15:46:12,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:46:12" (2/3) ... [2022-12-14 15:46:12,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551d3980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:46:12, skipping insertion in model container [2022-12-14 15:46:12,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:46:12" (3/3) ... [2022-12-14 15:46:12,491 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2022-12-14 15:46:12,505 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:46:12,505 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:46:12,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:46:12,544 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;@7ace9626, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:46:12,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:46:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 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) [2022-12-14 15:46:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 15:46:12,551 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:46:12,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:46:12,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:46:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:46:12,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1056001588, now seen corresponding path program 1 times [2022-12-14 15:46:12,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:46:12,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799483493] [2022-12-14 15:46:12,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:12,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:46:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:46:12,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:46:12,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799483493] [2022-12-14 15:46:12,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799483493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:46:12,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:46:12,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:46:12,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553757887] [2022-12-14 15:46:12,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:46:12,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:46:12,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:46:12,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:46:12,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:46:12,776 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:46:12,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:46:12,831 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2022-12-14 15:46:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:46:12,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 15:46:12,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:46:12,840 INFO L225 Difference]: With dead ends: 25 [2022-12-14 15:46:12,840 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 15:46:12,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:46:12,845 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:46:12,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:46:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 15:46:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 15:46:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2022-12-14 15:46:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2022-12-14 15:46:12,867 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 10 [2022-12-14 15:46:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:46:12,868 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2022-12-14 15:46:12,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:46:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2022-12-14 15:46:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 15:46:12,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:46:12,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:46:12,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:46:12,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:46:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:46:12,870 INFO L85 PathProgramCache]: Analyzing trace with hash -830149624, now seen corresponding path program 1 times [2022-12-14 15:46:12,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:46:12,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123350662] [2022-12-14 15:46:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:12,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:46:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:46:12,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:46:12,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123350662] [2022-12-14 15:46:12,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123350662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:46:12,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135087872] [2022-12-14 15:46:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:12,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:12,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:46:12,984 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:46:12,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:46:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:13,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:46:13,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:46:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:46:13,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:46:13,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135087872] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:46:13,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:46:13,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 15:46:13,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674808354] [2022-12-14 15:46:13,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:46:13,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:46:13,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:46:13,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:46:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:46:13,079 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-12-14 15:46:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:46:13,113 INFO L93 Difference]: Finished difference Result 27 states and 42 transitions. [2022-12-14 15:46:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:46:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2022-12-14 15:46:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:46:13,113 INFO L225 Difference]: With dead ends: 27 [2022-12-14 15:46:13,114 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 15:46:13,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:46:13,115 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:46:13,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:46:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 15:46:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 15:46:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 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) [2022-12-14 15:46:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-12-14 15:46:13,118 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2022-12-14 15:46:13,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:46:13,118 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-12-14 15:46:13,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-12-14 15:46:13,119 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-12-14 15:46:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 15:46:13,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:46:13,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:46:13,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:46:13,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:13,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:46:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:46:13,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1681103082, now seen corresponding path program 1 times [2022-12-14 15:46:13,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:46:13,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67156550] [2022-12-14 15:46:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:13,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:46:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:46:13,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:46:13,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67156550] [2022-12-14 15:46:13,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67156550] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:46:13,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573728516] [2022-12-14 15:46:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:13,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:13,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:46:13,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:46:13,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:46:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:46:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:46:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:46:13,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:46:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:46:13,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573728516] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:46:13,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [298078785] [2022-12-14 15:46:13,635 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:46:13,635 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:46:13,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:46:13,642 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:46:13,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:46:13,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:13,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:13,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:13,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:13,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:13,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:13,984 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 15:46:13,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 15:46:14,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:14,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:14,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:14,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:14,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:14,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:14,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 34 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 47 [2022-12-14 15:46:14,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:14,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:14,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:46:14,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:14,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:14,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:14,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:14,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:14,414 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:46:14,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 588 treesize of output 578 [2022-12-14 15:46:15,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,230 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:46:15,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:46:15,261 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:15,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:15,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,330 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:46:15,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:46:15,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,389 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:15,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:15,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,413 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:15,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:15,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,463 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:15,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:15,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,506 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:15,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:15,550 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:15,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:15,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,615 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:46:15,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 15:46:15,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,678 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:15,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:15,700 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:15,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:15,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,766 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:46:15,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:46:15,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,837 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:15,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:15,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,862 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:15,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:15,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,900 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:15,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:15,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:15,939 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:15,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:15,954 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:46:16,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '287#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:46:16,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:46:16,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:46:16,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 15:46:16,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150505145] [2022-12-14 15:46:16,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:46:16,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:46:16,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:46:16,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:46:16,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:46:16,184 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2022-12-14 15:46:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:46:16,225 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-12-14 15:46:16,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:46:16,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 15:46:16,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:46:16,226 INFO L225 Difference]: With dead ends: 36 [2022-12-14 15:46:16,226 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 15:46:16,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:46:16,228 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:46:16,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:46:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 15:46:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 15:46:16,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:46:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-12-14 15:46:16,232 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 16 [2022-12-14 15:46:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:46:16,232 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-12-14 15:46:16,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2022-12-14 15:46:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-12-14 15:46:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:46:16,232 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:46:16,233 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:46:16,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:46:16,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:16,434 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:46:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:46:16,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1618588462, now seen corresponding path program 2 times [2022-12-14 15:46:16,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:46:16,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094788960] [2022-12-14 15:46:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:16,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:46:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:46:16,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:46:16,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094788960] [2022-12-14 15:46:16,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094788960] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:46:16,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114336423] [2022-12-14 15:46:16,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:46:16,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:16,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:46:16,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:46:16,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:46:16,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:46:16,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:46:16,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:46:16,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:46:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:46:16,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:46:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:46:16,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114336423] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:46:16,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025880531] [2022-12-14 15:46:16,694 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:46:16,694 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:46:16,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:46:16,694 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:46:16,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:46:16,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,908 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 15:46:16,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 15:46:16,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 34 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 47 [2022-12-14 15:46:16,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:16,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 15:46:17,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:17,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:17,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:17,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:17,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:17,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:17,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,196 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:46:17,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 608 treesize of output 576 [2022-12-14 15:46:17,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,335 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:46:17,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:46:17,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,371 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:17,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:17,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:17,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,406 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:17,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:17,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,453 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:17,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:17,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,488 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:17,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:17,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,521 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:17,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:17,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,578 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:17,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:17,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,611 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:17,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:17,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,648 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:17,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:17,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,683 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:17,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:17,704 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:17,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:17,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,777 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:46:17,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:46:17,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,824 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:17,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:17,847 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:17,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:17,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,906 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:46:17,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:46:17,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:17,967 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:17,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:17,984 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:46:18,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:46:18,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:46:18,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:46:18,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 15:46:18,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393955764] [2022-12-14 15:46:18,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:46:18,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:46:18,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:46:18,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:46:18,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:46:18,338 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2022-12-14 15:46:18,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:46:18,390 INFO L93 Difference]: Finished difference Result 49 states and 74 transitions. [2022-12-14 15:46:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:46:18,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 15:46:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:46:18,391 INFO L225 Difference]: With dead ends: 49 [2022-12-14 15:46:18,391 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 15:46:18,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:46:18,391 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:46:18,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:46:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 15:46:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 15:46:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 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) [2022-12-14 15:46:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-12-14 15:46:18,395 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 19 [2022-12-14 15:46:18,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:46:18,395 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-12-14 15:46:18,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2022-12-14 15:46:18,395 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-12-14 15:46:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 15:46:18,395 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:46:18,395 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:46:18,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:46:18,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:18,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:46:18,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:46:18,598 INFO L85 PathProgramCache]: Analyzing trace with hash -970063028, now seen corresponding path program 3 times [2022-12-14 15:46:18,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:46:18,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001122261] [2022-12-14 15:46:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:18,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:46:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 15:46:18,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:46:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001122261] [2022-12-14 15:46:18,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001122261] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:46:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793626191] [2022-12-14 15:46:18,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:46:18,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:18,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:46:18,782 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:46:18,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:46:18,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:46:18,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:46:18,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:46:18,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:46:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 15:46:18,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:46:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 15:46:18,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793626191] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:46:18,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2018398503] [2022-12-14 15:46:18,913 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:46:18,913 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:46:18,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:46:18,913 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:46:18,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:46:18,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:18,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:18,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:18,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:18,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:18,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:19,108 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 15:46:19,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 15:46:19,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:19,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:19,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:19,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:19,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:19,301 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 15:46:19,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 15:46:19,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:19,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:19,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:46:19,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:19,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:19,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:19,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:19,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:19,569 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:46:19,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 588 treesize of output 578 [2022-12-14 15:46:20,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,164 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:46:20,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:46:20,190 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:20,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:20,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,246 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:46:20,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:46:20,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,293 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:20,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:20,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,313 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:20,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:20,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,349 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:20,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:20,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,395 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:20,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:20,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,445 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:20,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:20,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:20,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,482 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:20,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:20,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,520 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:20,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:20,538 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:20,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:20,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,595 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:46:20,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 15:46:20,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,662 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:20,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:20,682 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:20,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:20,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,732 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:46:20,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:46:20,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:20,779 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:20,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:20,798 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:46:21,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '879#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:46:21,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:46:21,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:46:21,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 15:46:21,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421387266] [2022-12-14 15:46:21,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:46:21,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 15:46:21,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:46:21,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 15:46:21,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:46:21,063 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:46:21,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:46:21,107 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2022-12-14 15:46:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:46:21,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 15:46:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:46:21,108 INFO L225 Difference]: With dead ends: 72 [2022-12-14 15:46:21,108 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 15:46:21,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:46:21,109 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:46:21,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:46:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 15:46:21,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-12-14 15:46:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 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) [2022-12-14 15:46:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-12-14 15:46:21,112 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2022-12-14 15:46:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:46:21,112 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-12-14 15:46:21,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:46:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-12-14 15:46:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 15:46:21,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:46:21,113 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:46:21,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 15:46:21,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:21,314 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:46:21,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:46:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1145354700, now seen corresponding path program 4 times [2022-12-14 15:46:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:46:21,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060862310] [2022-12-14 15:46:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:21,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:46:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 15:46:21,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:46:21,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060862310] [2022-12-14 15:46:21,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060862310] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:46:21,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530054115] [2022-12-14 15:46:21,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:46:21,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:21,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:46:21,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:46:21,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:46:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:21,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:46:21,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:46:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 15:46:21,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:46:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 15:46:21,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530054115] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:46:21,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1661266375] [2022-12-14 15:46:21,809 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:46:21,809 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:46:21,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:46:21,809 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:46:21,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:46:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:21,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:21,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:21,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:21,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:21,934 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 15:46:21,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 15:46:21,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:21,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:21,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:21,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:21,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:21,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:22,100 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 15:46:22,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 15:46:22,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:22,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:22,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:46:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:22,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:22,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:22,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:22,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:22,334 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:46:22,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 588 treesize of output 578 [2022-12-14 15:46:22,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:22,865 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:46:22,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:46:22,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:22,887 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:22,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:22,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:22,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:22,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:22,919 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:22,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:22,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:22,956 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:22,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:22,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:22,985 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:22,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:23,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:23,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,015 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:23,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:23,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,050 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:23,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:23,086 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:23,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:23,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,139 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:46:23,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:46:23,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,190 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:23,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:23,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,208 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:23,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:23,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:23,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,237 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:23,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:23,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,268 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:23,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:23,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,286 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:23,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:23,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:23,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,313 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:23,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:23,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:23,342 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:23,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:23,353 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:46:23,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1357#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:46:23,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:46:23,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:46:23,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 15:46:23,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125169017] [2022-12-14 15:46:23,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:46:23,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 15:46:23,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:46:23,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 15:46:23,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 15:46:23,801 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 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) [2022-12-14 15:46:23,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:46:23,845 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-12-14 15:46:23,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 15:46:23,846 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 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 40 [2022-12-14 15:46:23,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:46:23,846 INFO L225 Difference]: With dead ends: 84 [2022-12-14 15:46:23,846 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 15:46:23,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 15:46:23,847 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:46:23,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:46:23,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 15:46:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-12-14 15:46:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 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) [2022-12-14 15:46:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-12-14 15:46:23,851 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 40 [2022-12-14 15:46:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:46:23,851 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-12-14 15:46:23,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 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) [2022-12-14 15:46:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-12-14 15:46:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 15:46:23,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:46:23,852 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:46:23,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:46:24,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 15:46:24,053 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:46:24,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:46:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash -263092532, now seen corresponding path program 5 times [2022-12-14 15:46:24,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:46:24,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709209709] [2022-12-14 15:46:24,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:24,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:46:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 15:46:24,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:46:24,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709209709] [2022-12-14 15:46:24,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709209709] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:46:24,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321514518] [2022-12-14 15:46:24,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:46:24,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:24,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:46:24,614 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:46:24,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:46:24,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:46:24,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:46:24,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:46:24,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:46:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-12-14 15:46:24,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:46:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-12-14 15:46:24,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321514518] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:46:24,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771363937] [2022-12-14 15:46:24,908 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:46:24,908 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:46:24,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:46:24,908 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:46:24,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:46:24,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:24,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:24,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:24,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:24,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:24,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:25,037 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 15:46:25,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 15:46:25,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:25,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:25,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:25,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:25,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:25,201 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 15:46:25,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 15:46:25,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:25,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:25,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:46:25,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:25,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:25,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:25,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:25,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:25,434 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:46:25,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 588 treesize of output 578 [2022-12-14 15:46:25,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,003 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:46:26,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:46:26,024 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:26,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:26,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,084 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:46:26,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:46:26,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,132 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:26,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:26,151 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:26,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:26,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,208 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:46:26,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 15:46:26,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,259 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:26,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:26,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,282 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:26,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:26,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:26,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,324 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:26,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:26,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,352 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:26,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:26,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,378 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:26,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:26,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:26,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,410 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:26,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:26,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,437 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:26,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:26,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,458 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:26,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:26,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:26,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,488 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:26,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:26,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:26,519 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:26,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:26,530 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:46:26,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1965#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:46:26,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:46:26,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:46:26,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-12-14 15:46:26,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900090602] [2022-12-14 15:46:26,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:46:26,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 15:46:26,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:46:26,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 15:46:26,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 15:46:26,776 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 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) [2022-12-14 15:46:26,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:46:26,915 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2022-12-14 15:46:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 15:46:26,916 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 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 52 [2022-12-14 15:46:26,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:46:26,916 INFO L225 Difference]: With dead ends: 115 [2022-12-14 15:46:26,917 INFO L226 Difference]: Without dead ends: 85 [2022-12-14 15:46:26,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 15:46:26,918 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:46:26,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:46:26,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-14 15:46:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-12-14 15:46:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 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) [2022-12-14 15:46:26,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2022-12-14 15:46:26,927 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 52 [2022-12-14 15:46:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:46:26,927 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2022-12-14 15:46:26,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 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) [2022-12-14 15:46:26,927 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2022-12-14 15:46:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 15:46:26,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:46:26,928 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:46:26,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:46:27,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:27,130 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:46:27,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:46:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2056933576, now seen corresponding path program 6 times [2022-12-14 15:46:27,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:46:27,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115978301] [2022-12-14 15:46:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:27,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:46:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 15:46:27,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:46:27,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115978301] [2022-12-14 15:46:27,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115978301] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:46:27,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014382641] [2022-12-14 15:46:27,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:46:27,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:27,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:46:27,851 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:46:27,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:46:28,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:46:28,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:46:28,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 15:46:28,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:46:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 15:46:28,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:46:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 15:46:28,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014382641] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:46:28,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954062869] [2022-12-14 15:46:28,633 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:46:28,633 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:46:28,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:46:28,633 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:46:28,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:46:28,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,828 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 15:46:28,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 15:46:28,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 34 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 47 [2022-12-14 15:46:28,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:28,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 15:46:29,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:29,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:29,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:29,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:29,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:29,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:29,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,058 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:46:29,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 608 treesize of output 576 [2022-12-14 15:46:29,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,177 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:46:29,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:46:29,205 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:29,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:29,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,267 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:46:29,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:46:29,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,321 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:29,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:29,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,341 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:29,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:29,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:29,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,372 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:29,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:29,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,409 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:29,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:29,436 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:29,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:29,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,502 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:46:29,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:46:29,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,543 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:29,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:29,561 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:29,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:29,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,611 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:46:29,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:46:29,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,657 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:29,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:29,683 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:29,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:29,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,737 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:46:29,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 15:46:29,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:29,787 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:29,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:29,798 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:46:30,353 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2899#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:46:30,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:46:30,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:46:30,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-12-14 15:46:30,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890908620] [2022-12-14 15:46:30,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:46:30,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 15:46:30,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:46:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 15:46:30,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 15:46:30,356 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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) [2022-12-14 15:46:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:46:30,429 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2022-12-14 15:46:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 15:46:30,430 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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 83 [2022-12-14 15:46:30,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:46:30,431 INFO L225 Difference]: With dead ends: 170 [2022-12-14 15:46:30,431 INFO L226 Difference]: Without dead ends: 110 [2022-12-14 15:46:30,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 207 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 15:46:30,433 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:46:30,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:46:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-14 15:46:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-12-14 15:46:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0642201834862386) internal successors, (116), 109 states have internal predecessors, (116), 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) [2022-12-14 15:46:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2022-12-14 15:46:30,440 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 83 [2022-12-14 15:46:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:46:30,440 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2022-12-14 15:46:30,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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) [2022-12-14 15:46:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2022-12-14 15:46:30,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 15:46:30,441 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:46:30,441 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:46:30,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:46:30,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:30,643 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:46:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:46:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash -706817012, now seen corresponding path program 7 times [2022-12-14 15:46:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:46:30,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469946983] [2022-12-14 15:46:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:30,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:46:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 15:46:32,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:46:32,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469946983] [2022-12-14 15:46:32,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469946983] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:46:32,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077611768] [2022-12-14 15:46:32,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:46:32,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:32,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:46:32,436 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:46:32,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:46:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:32,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 15:46:32,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:46:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 15:46:32,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:46:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 15:46:34,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077611768] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:46:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2140922673] [2022-12-14 15:46:34,780 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:46:34,780 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:46:34,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:46:34,780 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:46:34,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:46:34,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:34,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:34,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:34,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:34,961 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 15:46:34,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 15:46:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:35,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:35,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:35,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:35,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:35,184 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 15:46:35,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 15:46:35,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:35,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:35,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:46:35,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:35,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:35,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:35,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:35,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:35,431 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:46:35,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 588 treesize of output 578 [2022-12-14 15:46:35,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:35,999 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:46:35,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:46:36,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,019 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:36,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:36,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:36,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,048 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:36,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:36,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,088 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:36,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:36,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,114 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:36,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:36,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:36,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,147 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:36,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:36,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,186 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:36,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:36,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,214 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:36,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:36,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:36,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,246 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:36,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:36,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,271 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:36,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:36,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,289 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:36,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:36,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,328 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:36,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:36,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,353 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:36,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:36,368 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:36,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:36,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,414 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:46:36,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 15:46:36,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:36,482 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:36,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:36,493 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:46:37,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4193#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:46:37,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:46:37,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:46:37,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-12-14 15:46:37,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360951890] [2022-12-14 15:46:37,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:46:37,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 15:46:37,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:46:37,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 15:46:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 15:46:37,696 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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) [2022-12-14 15:46:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:46:37,824 INFO L93 Difference]: Finished difference Result 220 states and 281 transitions. [2022-12-14 15:46:37,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 15:46:37,824 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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 108 [2022-12-14 15:46:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:46:37,825 INFO L225 Difference]: With dead ends: 220 [2022-12-14 15:46:37,825 INFO L226 Difference]: Without dead ends: 160 [2022-12-14 15:46:37,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 235 SyntacticMatches, 33 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5778 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 15:46:37,827 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:46:37,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:46:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-14 15:46:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-12-14 15:46:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0440251572327044) internal successors, (166), 159 states have internal predecessors, (166), 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) [2022-12-14 15:46:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2022-12-14 15:46:37,839 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 108 [2022-12-14 15:46:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:46:37,839 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2022-12-14 15:46:37,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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) [2022-12-14 15:46:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2022-12-14 15:46:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 15:46:37,841 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:46:37,842 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:46:37,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:46:38,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:38,044 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:46:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:46:38,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1171222412, now seen corresponding path program 8 times [2022-12-14 15:46:38,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:46:38,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109416345] [2022-12-14 15:46:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:38,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:46:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:46:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 15:46:43,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:46:43,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109416345] [2022-12-14 15:46:43,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109416345] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:46:43,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788600492] [2022-12-14 15:46:43,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:46:43,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:46:43,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:46:43,003 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:46:43,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:46:50,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 15:46:50,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:46:50,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:46:50,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:46:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5071 trivial. 0 not checked. [2022-12-14 15:46:51,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:46:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5071 trivial. 0 not checked. [2022-12-14 15:46:51,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788600492] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:46:51,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [624782701] [2022-12-14 15:46:51,638 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:46:51,638 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:46:51,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:46:51,638 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:46:51,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:46:51,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,758 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 15:46:51,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 15:46:51,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,919 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 15:46:51,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 15:46:51,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:51,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 15:46:52,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:52,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:52,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:52,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:52,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:52,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:52,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,131 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:46:52,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 608 treesize of output 576 [2022-12-14 15:46:52,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,253 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:46:52,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:46:52,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,280 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:52,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:52,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:52,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,314 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:52,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:52,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,365 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:52,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:52,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,394 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:52,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:52,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:52,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,428 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:52,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:52,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,475 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:52,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:52,508 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:46:52,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:46:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,566 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:46:52,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 15:46:52,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,613 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:52,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:52,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,636 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:52,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:52,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:52,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,665 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:52,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:52,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,692 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:52,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:52,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,707 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:52,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:46:52,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,736 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:46:52,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:46:52,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:46:52,772 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:46:52,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:46:52,783 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:46:55,522 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6009#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:46:55,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:46:55,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:46:55,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-12-14 15:46:55,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722428810] [2022-12-14 15:46:55,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:46:55,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-12-14 15:46:55,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:46:55,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-12-14 15:46:55,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 15:46:55,533 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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) [2022-12-14 15:46:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:46:55,833 INFO L93 Difference]: Finished difference Result 281 states and 353 transitions. [2022-12-14 15:46:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-12-14 15:46:55,833 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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 158 [2022-12-14 15:46:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:46:55,835 INFO L225 Difference]: With dead ends: 281 [2022-12-14 15:46:55,835 INFO L226 Difference]: Without dead ends: 221 [2022-12-14 15:46:55,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 413 SyntacticMatches, 33 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7058 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 15:46:55,841 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:46:55,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:46:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-12-14 15:46:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-12-14 15:46:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0318181818181817) internal successors, (227), 220 states have internal predecessors, (227), 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) [2022-12-14 15:46:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 227 transitions. [2022-12-14 15:46:55,849 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 227 transitions. Word has length 158 [2022-12-14 15:46:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:46:55,849 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 227 transitions. [2022-12-14 15:46:55,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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) [2022-12-14 15:46:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 227 transitions. [2022-12-14 15:46:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-12-14 15:46:55,851 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:46:55,851 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:46:55,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:46:56,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 15:46:56,052 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:46:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:46:56,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1965795000, now seen corresponding path program 9 times [2022-12-14 15:46:56,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:46:56,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677433278] [2022-12-14 15:46:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:46:56,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:46:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:47:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 15:47:01,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:47:01,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677433278] [2022-12-14 15:47:01,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677433278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:47:01,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581464383] [2022-12-14 15:47:01,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:47:01,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:47:01,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:47:01,833 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:47:01,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:47:02,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:47:02,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:47:02,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 15:47:02,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:47:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 15:47:02,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:47:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 15:47:08,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581464383] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:47:08,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2015304729] [2022-12-14 15:47:08,909 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:47:08,909 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:47:08,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:47:08,909 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:47:08,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:47:08,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:08,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:08,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:08,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:08,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:08,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,135 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 15:47:09,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 15:47:09,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 34 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 47 [2022-12-14 15:47:09,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 15:47:09,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,397 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:47:09,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 608 treesize of output 576 [2022-12-14 15:47:09,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,525 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:47:09,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:47:09,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,558 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:09,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:09,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:09,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,594 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:47:09,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:47:09,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,635 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:09,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:09,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,673 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:09,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:09,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,698 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:47:09,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:47:09,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,733 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:09,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:09,758 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:47:09,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:47:09,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,810 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:47:09,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 15:47:09,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,864 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:09,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:09,878 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:47:09,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:47:09,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:09,939 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:47:09,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 15:47:09,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:10,000 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:10,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:10,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:10,020 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:10,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:10,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:10,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:10,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:10,056 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:47:10,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:47:10,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:10,092 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:10,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:10,119 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:47:14,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8515#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:47:14,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:47:14,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:47:14,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-12-14 15:47:14,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843188150] [2022-12-14 15:47:14,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:47:14,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-12-14 15:47:14,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:47:14,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-12-14 15:47:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 15:47:14,384 INFO L87 Difference]: Start difference. First operand 221 states and 227 transitions. Second operand has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 202 states have internal predecessors, (217), 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) [2022-12-14 15:47:14,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:47:14,801 INFO L93 Difference]: Finished difference Result 442 states and 554 transitions. [2022-12-14 15:47:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-12-14 15:47:14,801 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 202 states have internal predecessors, (217), 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 219 [2022-12-14 15:47:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:47:14,803 INFO L225 Difference]: With dead ends: 442 [2022-12-14 15:47:14,803 INFO L226 Difference]: Without dead ends: 322 [2022-12-14 15:47:14,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 481 SyntacticMatches, 69 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22596 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 15:47:14,806 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:47:14,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:47:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-12-14 15:47:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2022-12-14 15:47:14,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.0218068535825544) internal successors, (328), 321 states have internal predecessors, (328), 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) [2022-12-14 15:47:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 328 transitions. [2022-12-14 15:47:14,820 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 328 transitions. Word has length 219 [2022-12-14 15:47:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:47:14,820 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 328 transitions. [2022-12-14 15:47:14,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 202 states have internal predecessors, (217), 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) [2022-12-14 15:47:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 328 transitions. [2022-12-14 15:47:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-12-14 15:47:14,823 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:47:14,824 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:47:14,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:47:15,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:47:15,025 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:47:15,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:47:15,026 INFO L85 PathProgramCache]: Analyzing trace with hash 649549196, now seen corresponding path program 10 times [2022-12-14 15:47:15,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:47:15,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106906447] [2022-12-14 15:47:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:47:15,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:47:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:47:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21365 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 15:47:37,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:47:37,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106906447] [2022-12-14 15:47:37,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106906447] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:47:37,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562632539] [2022-12-14 15:47:37,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:47:37,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:47:37,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:47:37,117 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:47:37,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:47:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:47:37,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 4315 conjuncts, 202 conjunts are in the unsatisfiable core [2022-12-14 15:47:37,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:47:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21365 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 15:47:38,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:48:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21365 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 15:48:07,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562632539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:48:07,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1210609607] [2022-12-14 15:48:07,244 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:48:07,244 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:48:07,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:48:07,244 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:48:07,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:48:07,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,395 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 15:48:07,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 15:48:07,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,587 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 15:48:07,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 15:48:07,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:48:07,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:07,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:07,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:07,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:07,808 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:48:07,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 588 treesize of output 578 [2022-12-14 15:48:08,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,348 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:48:08,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:48:08,366 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:48:08,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:48:08,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,417 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:48:08,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 15:48:08,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,465 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:48:08,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:48:08,479 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:48:08,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:48:08,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,528 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:48:08,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:48:08,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,569 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:48:08,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:48:08,587 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:48:08,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:48:08,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,651 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:48:08,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 15:48:08,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,693 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:48:08,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:48:08,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,710 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:48:08,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:48:08,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:48:08,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,761 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:48:08,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:48:08,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,789 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:48:08,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:48:08,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,806 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:48:08,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:48:08,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,836 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:48:08,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:48:08,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:48:08,864 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:48:08,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:48:08,875 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:48:09,883 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12353#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:48:09,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:48:09,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:48:09,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-12-14 15:48:09,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951792353] [2022-12-14 15:48:09,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:48:09,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-12-14 15:48:09,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:48:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-12-14 15:48:09,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 15:48:09,904 INFO L87 Difference]: Start difference. First operand 322 states and 328 transitions. Second operand has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 404 states have internal predecessors, (419), 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) [2022-12-14 15:48:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:48:11,857 INFO L93 Difference]: Finished difference Result 644 states and 857 transitions. [2022-12-14 15:48:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-12-14 15:48:11,858 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 404 states have internal predecessors, (419), 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 320 [2022-12-14 15:48:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:48:11,860 INFO L225 Difference]: With dead ends: 644 [2022-12-14 15:48:11,860 INFO L226 Difference]: Without dead ends: 524 [2022-12-14 15:48:11,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1160 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 15:48:11,867 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:48:11,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:48:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-12-14 15:48:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2022-12-14 15:48:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.0133843212237095) internal successors, (530), 523 states have internal predecessors, (530), 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) [2022-12-14 15:48:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 530 transitions. [2022-12-14 15:48:11,879 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 530 transitions. Word has length 320 [2022-12-14 15:48:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:48:11,879 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 530 transitions. [2022-12-14 15:48:11,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 404 states have internal predecessors, (419), 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) [2022-12-14 15:48:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 530 transitions. [2022-12-14 15:48:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-12-14 15:48:11,886 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:48:11,886 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:48:11,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:48:12,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 15:48:12,087 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:48:12,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:48:12,089 INFO L85 PathProgramCache]: Analyzing trace with hash 489073420, now seen corresponding path program 11 times [2022-12-14 15:48:12,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:48:12,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974738769] [2022-12-14 15:48:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:48:12,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:48:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:49:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 82268 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 15:49:40,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:49:40,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974738769] [2022-12-14 15:49:40,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974738769] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:49:40,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483266348] [2022-12-14 15:49:40,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:49:40,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:49:40,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:49:40,348 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:49:40,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:56:42,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 15:56:42,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:56:42,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 15:56:42,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:56:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 82268 backedges. 22 proven. 296 refuted. 0 times theorem prover too weak. 81950 trivial. 0 not checked. [2022-12-14 15:56:46,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:56:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 82268 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 81933 trivial. 0 not checked. [2022-12-14 15:56:49,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483266348] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:56:49,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1983978142] [2022-12-14 15:56:49,573 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:56:49,573 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:56:49,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:56:49,573 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:56:49,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:56:49,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,721 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 15:56:49,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 15:56:49,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,905 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 15:56:49,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 15:56:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:49,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 15:56:50,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:50,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:50,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:50,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:50,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:50,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:50,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,114 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:56:50,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 608 treesize of output 576 [2022-12-14 15:56:50,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,227 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:56:50,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:56:50,254 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:56:50,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:56:50,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,305 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:56:50,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:56:50,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,355 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:56:50,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:56:50,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,377 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:56:50,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:56:50,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,410 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:56:50,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:56:50,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,450 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:56:50,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:56:50,488 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:56:50,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:56:50,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,536 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:56:50,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:56:50,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,577 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:56:50,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:56:50,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,598 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:56:50,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:56:50,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:56:50,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,639 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:56:50,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2022-12-14 15:56:50,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,677 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:56:50,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:56:50,696 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:56:50,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:56:50,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,763 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:56:50,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 113 [2022-12-14 15:56:50,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:56:50,801 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:56:50,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:56:50,812 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:56:59,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18263#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:56:59,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:56:59,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:56:59,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 28, 28] total 457 [2022-12-14 15:56:59,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094246180] [2022-12-14 15:56:59,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:56:59,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 457 states [2022-12-14 15:56:59,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:56:59,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 457 interpolants. [2022-12-14 15:56:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83255, Invalid=129727, Unknown=0, NotChecked=0, Total=212982 [2022-12-14 15:56:59,369 INFO L87 Difference]: Start difference. First operand 524 states and 530 transitions. Second operand has 457 states, 457 states have (on average 1.0547045951859957) internal successors, (482), 457 states have internal predecessors, (482), 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) [2022-12-14 15:57:02,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:57:02,182 INFO L93 Difference]: Finished difference Result 765 states and 897 transitions. [2022-12-14 15:57:02,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 453 states. [2022-12-14 15:57:02,183 INFO L78 Accepts]: Start accepts. Automaton has has 457 states, 457 states have (on average 1.0547045951859957) internal successors, (482), 457 states have internal predecessors, (482), 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 522 [2022-12-14 15:57:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:57:02,185 INFO L225 Difference]: With dead ends: 765 [2022-12-14 15:57:02,185 INFO L226 Difference]: Without dead ends: 645 [2022-12-14 15:57:02,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1969 GetRequests, 1485 SyntacticMatches, 23 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35023 ImplicationChecksByTransitivity, 54.2s TimeCoverageRelationStatistics Valid=83306, Invalid=130600, Unknown=0, NotChecked=0, Total=213906 [2022-12-14 15:57:02,193 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:57:02,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 40 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:57:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-12-14 15:57:02,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2022-12-14 15:57:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.0108695652173914) internal successors, (651), 644 states have internal predecessors, (651), 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) [2022-12-14 15:57:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 651 transitions. [2022-12-14 15:57:02,209 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 651 transitions. Word has length 522 [2022-12-14 15:57:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:57:02,210 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 651 transitions. [2022-12-14 15:57:02,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 457 states, 457 states have (on average 1.0547045951859957) internal successors, (482), 457 states have internal predecessors, (482), 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) [2022-12-14 15:57:02,210 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 651 transitions. [2022-12-14 15:57:02,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2022-12-14 15:57:02,213 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:57:02,213 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:57:02,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 15:57:02,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 15:57:02,415 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:57:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:57:02,416 INFO L85 PathProgramCache]: Analyzing trace with hash 734949448, now seen corresponding path program 12 times [2022-12-14 15:57:02,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:57:02,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696083892] [2022-12-14 15:57:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:57:02,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:57:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:58:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 86811 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2022-12-14 15:58:37,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:58:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696083892] [2022-12-14 15:58:37,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696083892] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:58:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918171447] [2022-12-14 15:58:37,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:58:37,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:58:37,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:58:37,987 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:58:37,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed040741-cd42-4d77-a49e-684e987ecd42/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:58:39,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:58:39,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:58:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 8606 conjuncts, 405 conjunts are in the unsatisfiable core [2022-12-14 15:58:39,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:58:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 86811 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2022-12-14 15:58:40,143 INFO L328 TraceCheckSpWp]: Computing backward predicates...