./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sina4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI --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 933eff495d93b07d12af9180ab5b75cc35fb173187f8af9883307194e1e7fea3 --- 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-5e519f3 [2022-11-03 01:42:03,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:42:03,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:42:03,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:42:03,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:42:03,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:42:03,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:42:03,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:42:03,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:42:03,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:42:03,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:42:03,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:42:03,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:42:03,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:42:03,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:42:03,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:42:03,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:42:03,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:42:03,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:42:03,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:42:03,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:42:03,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:42:03,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:42:03,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:42:03,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:42:03,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:42:03,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:42:03,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:42:03,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:42:03,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:42:03,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:42:03,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:42:03,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:42:03,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:42:03,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:42:03,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:42:03,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:42:03,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:42:03,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:42:03,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:42:03,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:42:03,891 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:42:03,931 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:42:03,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:42:03,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:42:03,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:42:03,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:42:03,933 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:42:03,933 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:42:03,933 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:42:03,933 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:42:03,934 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:42:03,935 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:42:03,935 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:42:03,935 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:42:03,935 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:42:03,935 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:42:03,936 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:42:03,936 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:42:03,936 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:42:03,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:42:03,937 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:42:03,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:42:03,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:42:03,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:42:03,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:42:03,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:42:03,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:42:03,938 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:42:03,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:42:03,938 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:42:03,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:42:03,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:42:03,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:42:03,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:42:03,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:42:03,940 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:42:03,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:42:03,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:42:03,940 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:42:03,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:42:03,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:42:03,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:42:03,941 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_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 933eff495d93b07d12af9180ab5b75cc35fb173187f8af9883307194e1e7fea3 [2022-11-03 01:42:04,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:42:04,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:42:04,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:42:04,272 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:42:04,272 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:42:04,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/sina4.c [2022-11-03 01:42:04,340 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/data/4718082e9/79e1bc50f43d4948bf28de0bef3534be/FLAG212f2f51a [2022-11-03 01:42:04,875 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:42:04,875 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/sv-benchmarks/c/array-fpi/sina4.c [2022-11-03 01:42:04,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/data/4718082e9/79e1bc50f43d4948bf28de0bef3534be/FLAG212f2f51a [2022-11-03 01:42:05,230 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/data/4718082e9/79e1bc50f43d4948bf28de0bef3534be [2022-11-03 01:42:05,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:42:05,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:42:05,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:42:05,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:42:05,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:42:05,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6116011a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05, skipping insertion in model container [2022-11-03 01:42:05,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:42:05,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:42:05,487 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/sv-benchmarks/c/array-fpi/sina4.c[588,601] [2022-11-03 01:42:05,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:42:05,542 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:42:05,555 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/sv-benchmarks/c/array-fpi/sina4.c[588,601] [2022-11-03 01:42:05,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:42:05,598 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:42:05,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05 WrapperNode [2022-11-03 01:42:05,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:42:05,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:42:05,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:42:05,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:42:05,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,652 INFO L138 Inliner]: procedures = 17, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2022-11-03 01:42:05,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:42:05,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:42:05,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:42:05,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:42:05,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,692 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:42:05,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:42:05,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:42:05,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:42:05,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05" (1/1) ... [2022-11-03 01:42:05,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:42:05,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:05,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:42:05,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:42:05,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:42:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:42:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:42:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:42:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:42:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:42:05,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:42:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:42:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:42:05,860 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:42:05,862 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:42:06,027 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:42:06,076 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:42:06,076 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-03 01:42:06,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:06 BoogieIcfgContainer [2022-11-03 01:42:06,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:42:06,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:42:06,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:42:06,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:42:06,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:42:05" (1/3) ... [2022-11-03 01:42:06,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df9c8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:06, skipping insertion in model container [2022-11-03 01:42:06,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:05" (2/3) ... [2022-11-03 01:42:06,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df9c8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:06, skipping insertion in model container [2022-11-03 01:42:06,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:06" (3/3) ... [2022-11-03 01:42:06,102 INFO L112 eAbstractionObserver]: Analyzing ICFG sina4.c [2022-11-03 01:42:06,130 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:42:06,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:42:06,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:42:06,224 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;@4db9c70b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:42:06,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:42:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) 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) [2022-11-03 01:42:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:42:06,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:06,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:06,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:06,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash -155408202, now seen corresponding path program 1 times [2022-11-03 01:42:06,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:06,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010494107] [2022-11-03 01:42:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:06,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:06,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:06,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010494107] [2022-11-03 01:42:06,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010494107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:06,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:06,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:42:06,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116977709] [2022-11-03 01:42:06,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:06,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:42:06,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:06,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:42:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:42:06,651 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:06,778 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2022-11-03 01:42:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:42:06,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 01:42:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:06,801 INFO L225 Difference]: With dead ends: 24 [2022-11-03 01:42:06,803 INFO L226 Difference]: Without dead ends: 12 [2022-11-03 01:42:06,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:42:06,828 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:06,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-03 01:42:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-03 01:42:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:06,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-03 01:42:06,871 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2022-11-03 01:42:06,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:06,871 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-03 01:42:06,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-03 01:42:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 01:42:06,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:06,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:06,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:42:06,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:06,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1655315069, now seen corresponding path program 1 times [2022-11-03 01:42:06,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:06,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144228287] [2022-11-03 01:42:06,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:06,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:42:07,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:07,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144228287] [2022-11-03 01:42:07,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144228287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:07,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:07,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:42:07,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356269274] [2022-11-03 01:42:07,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:07,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:07,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:07,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:42:07,104 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:07,175 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2022-11-03 01:42:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:42:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2022-11-03 01:42:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:07,178 INFO L225 Difference]: With dead ends: 27 [2022-11-03 01:42:07,178 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 01:42:07,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:42:07,188 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:07,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 6 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:07,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 01:42:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2022-11-03 01:42:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:07,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-03 01:42:07,196 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2022-11-03 01:42:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:07,197 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-03 01:42:07,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:07,197 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-03 01:42:07,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:42:07,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:07,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:07,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:42:07,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:07,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:07,202 INFO L85 PathProgramCache]: Analyzing trace with hash -165518152, now seen corresponding path program 1 times [2022-11-03 01:42:07,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:07,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954405373] [2022-11-03 01:42:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:07,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:08,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:08,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954405373] [2022-11-03 01:42:08,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954405373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:08,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166574860] [2022-11-03 01:42:08,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:08,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:08,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:08,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:08,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:42:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:08,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 01:42:08,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:08,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:42:08,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 01:42:08,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:42:09,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-03 01:42:09,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-03 01:42:09,449 INFO L356 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2022-11-03 01:42:09,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2022-11-03 01:42:15,524 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:42:15,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 72 [2022-11-03 01:42:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:15,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:17,684 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~b~0#1.base| Int)) (= (select (let ((.cse0 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) 1))) |c_ULTIMATE.start_main_~b~0#1.offset|) (+ c_~N~0 2))) is different from false [2022-11-03 01:42:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-03 01:42:17,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166574860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:17,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1252168930] [2022-11-03 01:42:18,004 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:42:18,004 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:18,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:18,013 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:18,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:18,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,226 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:42:18,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:42:18,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:42:18,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:42:18,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:42:18,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:18,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:18,559 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:42:18,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 416 treesize of output 412 [2022-11-03 01:42:18,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:42:18,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:18,730 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:42:18,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:42:18,834 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:42:18,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:42:18,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:18,922 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:42:18,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 01:42:19,006 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:42:19,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:42:19,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:19,048 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:42:19,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:42:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:19,095 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:42:19,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:42:19,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:19,138 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:42:19,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:42:19,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:19,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '241#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:42:19,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:19,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:42:19,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-11-03 01:42:19,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133895904] [2022-11-03 01:42:19,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:19,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 01:42:19,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:19,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 01:42:19,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=881, Unknown=1, NotChecked=60, Total=1056 [2022-11-03 01:42:19,804 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:20,067 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-03 01:42:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 01:42:20,070 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 13 [2022-11-03 01:42:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:20,072 INFO L225 Difference]: With dead ends: 33 [2022-11-03 01:42:20,072 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 01:42:20,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=120, Invalid=939, Unknown=1, NotChecked=62, Total=1122 [2022-11-03 01:42:20,074 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:20,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 143 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-11-03 01:42:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 01:42:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-11-03 01:42:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-11-03 01:42:20,084 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 13 [2022-11-03 01:42:20,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:20,084 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-11-03 01:42:20,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-11-03 01:42:20,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:42:20,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:20,086 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:20,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:20,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:20,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:20,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1745611751, now seen corresponding path program 2 times [2022-11-03 01:42:20,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:20,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760274064] [2022-11-03 01:42:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:20,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:42:20,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:20,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760274064] [2022-11-03 01:42:20,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760274064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:20,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707970679] [2022-11-03 01:42:20,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:42:20,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:20,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:20,413 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:20,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:42:20,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:42:20,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:42:20,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:42:20,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:42:20,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:42:20,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707970679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:20,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1066795436] [2022-11-03 01:42:20,602 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:42:20,602 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:20,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:20,603 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:20,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:20,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,786 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:42:20,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:42:20,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:42:20,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:42:20,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:20,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:42:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:21,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:21,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:21,120 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 01:42:21,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 01:42:21,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:42:21,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:21,409 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:42:21,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:42:21,497 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:42:21,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:42:21,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:21,587 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:42:21,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:42:21,653 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:42:21,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:42:21,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:21,692 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:42:21,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:42:21,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:21,739 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:42:21,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:42:21,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:21,797 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:42:21,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:42:21,821 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:22,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '436#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:42:22,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:22,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:42:22,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-03 01:42:22,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87939834] [2022-11-03 01:42:22,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:22,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:42:22,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:22,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:42:22,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:42:22,214 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:22,349 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-11-03 01:42:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:42:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 14 [2022-11-03 01:42:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:22,352 INFO L225 Difference]: With dead ends: 62 [2022-11-03 01:42:22,352 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 01:42:22,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:42:22,354 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:22,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 01:42:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2022-11-03 01:42:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-03 01:42:22,361 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2022-11-03 01:42:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:22,361 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-03 01:42:22,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-03 01:42:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:42:22,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:22,362 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:22,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 01:42:22,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:22,567 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:22,567 INFO L85 PathProgramCache]: Analyzing trace with hash -421291265, now seen corresponding path program 3 times [2022-11-03 01:42:22,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:22,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664054948] [2022-11-03 01:42:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:22,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:42:22,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664054948] [2022-11-03 01:42:22,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664054948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069243299] [2022-11-03 01:42:22,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:42:22,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:22,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:22,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:22,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:42:22,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:42:22,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:42:22,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:42:22,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:42:22,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:42:22,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069243299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:22,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1666184903] [2022-11-03 01:42:22,841 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:42:22,841 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:22,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:22,842 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:22,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:22,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:22,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:22,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:22,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:22,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:23,015 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:42:23,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:42:23,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:23,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:42:23,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:23,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:23,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:23,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:42:23,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:23,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:23,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:42:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:23,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:23,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:23,313 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 01:42:23,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 01:42:23,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:42:23,481 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:42:23,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:42:23,556 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:42:23,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:42:23,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:23,630 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:42:23,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:42:23,700 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:42:23,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:42:23,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:23,769 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:42:23,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:42:23,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:23,810 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:42:23,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:42:23,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:23,850 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:42:23,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:42:23,866 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:24,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '675#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:42:24,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:24,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:42:24,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 01:42:24,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249980864] [2022-11-03 01:42:24,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:24,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:42:24,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:24,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:42:24,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:42:24,215 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:24,352 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-03 01:42:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:42:24,352 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 14 [2022-11-03 01:42:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:24,353 INFO L225 Difference]: With dead ends: 37 [2022-11-03 01:42:24,353 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 01:42:24,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:42:24,354 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:24,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 21 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:24,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 01:42:24,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-11-03 01:42:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-03 01:42:24,360 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2022-11-03 01:42:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:24,360 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-03 01:42:24,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-03 01:42:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:42:24,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:24,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:24,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:24,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:24,567 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:24,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1101372854, now seen corresponding path program 4 times [2022-11-03 01:42:24,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:24,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405721876] [2022-11-03 01:42:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:26,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:26,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405721876] [2022-11-03 01:42:26,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405721876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:26,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649650405] [2022-11-03 01:42:26,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:42:26,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:26,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:26,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:26,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:42:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:26,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 01:42:26,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:26,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:42:26,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 01:42:26,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:42:26,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:26,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 01:42:26,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:26,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:26,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:26,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-11-03 01:42:26,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:26,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:26,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:26,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-11-03 01:42:27,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:27,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 53 treesize of output 39 [2022-11-03 01:42:27,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:27,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:27,296 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-03 01:42:27,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 56 [2022-11-03 01:42:27,515 INFO L356 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2022-11-03 01:42:27,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-11-03 01:42:33,252 WARN L234 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 40 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:42:33,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:33,293 INFO L356 Elim1Store]: treesize reduction 53, result has 26.4 percent of original size [2022-11-03 01:42:33,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 43 treesize of output 60 [2022-11-03 01:42:36,960 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:42:36,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 68 [2022-11-03 01:42:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:36,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:56,787 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_158| Int) (v_ArrVal_231 Int) (|ULTIMATE.start_main_~b~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_160| Int) (v_ArrVal_228 Int)) (or (= (+ c_~N~0 2) (select (store (let ((.cse0 (store (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse1 .cse2 (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse1 .cse2)))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_160|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_228))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_158|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_231) |c_ULTIMATE.start_main_~b~0#1.offset|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_160|)) (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_158|)))) is different from false [2022-11-03 01:42:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 01:42:58,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649650405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:58,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1586793718] [2022-11-03 01:42:58,222 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:42:58,222 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:58,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:58,223 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:58,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:58,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,411 INFO L356 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-03 01:42:58,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-11-03 01:42:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:42:58,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,643 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:42:58,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:42:58,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:42:58,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:58,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:42:58,858 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:42:58,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 416 treesize of output 412 [2022-11-03 01:42:58,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:42:58,988 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:42:58,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:42:59,056 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:42:59,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:42:59,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:59,128 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:42:59,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:42:59,206 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:42:59,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:42:59,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:59,242 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:42:59,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:42:59,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:59,282 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:42:59,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:42:59,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:42:59,324 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:42:59,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:42:59,341 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:00,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '914#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:00,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:00,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:00,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2022-11-03 01:43:00,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565339110] [2022-11-03 01:43:00,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:00,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 01:43:00,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:00,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 01:43:00,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1802, Unknown=8, NotChecked=86, Total=2070 [2022-11-03 01:43:00,124 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:04,126 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-11-03 01:43:04,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 01:43:04,127 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 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 17 [2022-11-03 01:43:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:04,127 INFO L225 Difference]: With dead ends: 36 [2022-11-03 01:43:04,127 INFO L226 Difference]: Without dead ends: 34 [2022-11-03 01:43:04,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=209, Invalid=2139, Unknown=8, NotChecked=94, Total=2450 [2022-11-03 01:43:04,129 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:04,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-11-03 01:43:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-03 01:43:04,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-11-03 01:43:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 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) [2022-11-03 01:43:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-03 01:43:04,151 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2022-11-03 01:43:04,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:04,151 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-03 01:43:04,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-03 01:43:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 01:43:04,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:04,154 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:04,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:04,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:43:04,379 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:04,380 INFO L85 PathProgramCache]: Analyzing trace with hash 314642723, now seen corresponding path program 5 times [2022-11-03 01:43:04,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:04,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462089770] [2022-11-03 01:43:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:04,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:43:04,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:04,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462089770] [2022-11-03 01:43:04,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462089770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:04,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660388910] [2022-11-03 01:43:04,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:43:04,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:04,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:04,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:04,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:43:04,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:43:04,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:04,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:43:04,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:43:04,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:43:04,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660388910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:04,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340584719] [2022-11-03 01:43:04,763 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:43:04,764 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:04,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:04,764 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:04,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:04,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:43:04,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:04,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:04,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:04,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:04,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:04,949 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:43:04,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:43:04,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:04,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:04,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:04,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:43:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:05,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:05,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:43:05,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:05,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:05,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:05,176 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:43:05,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 416 treesize of output 412 [2022-11-03 01:43:05,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:43:05,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:05,316 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:43:05,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:43:05,391 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:43:05,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:43:05,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:05,455 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:43:05,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:43:05,520 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:43:05,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:43:05,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:05,554 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:43:05,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:43:05,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:05,592 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:43:05,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:43:05,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:05,632 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:43:05,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:43:05,648 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:06,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1159#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:06,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:06,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:06,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-03 01:43:06,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756038672] [2022-11-03 01:43:06,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:06,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:43:06,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:06,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:43:06,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:43:06,048 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2022-11-03 01:43:06,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:06,219 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2022-11-03 01:43:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:43:06,220 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) Word has length 18 [2022-11-03 01:43:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:06,221 INFO L225 Difference]: With dead ends: 78 [2022-11-03 01:43:06,221 INFO L226 Difference]: Without dead ends: 64 [2022-11-03 01:43:06,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:43:06,222 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:06,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 30 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-03 01:43:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2022-11-03 01:43:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-11-03 01:43:06,237 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 18 [2022-11-03 01:43:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:06,237 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-11-03 01:43:06,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2022-11-03 01:43:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-11-03 01:43:06,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 01:43:06,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:06,239 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:06,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:06,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:06,439 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash -423339907, now seen corresponding path program 6 times [2022-11-03 01:43:06,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:06,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699904745] [2022-11-03 01:43:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:06,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:43:06,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:06,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699904745] [2022-11-03 01:43:06,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699904745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:06,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471679903] [2022-11-03 01:43:06,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:43:06,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:06,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:06,600 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:06,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:43:06,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:43:06,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:06,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:43:06,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:43:06,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:43:06,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471679903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:06,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [979299835] [2022-11-03 01:43:06,838 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:43:06,838 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:06,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:06,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:06,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:06,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:43:06,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:06,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:06,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:07,012 INFO L356 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-03 01:43:07,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-11-03 01:43:07,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:07,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:07,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:07,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:07,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:07,216 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:43:07,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:43:07,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:07,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:07,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 01:43:07,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:07,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:07,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:07,438 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 01:43:07,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 01:43:07,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:43:07,655 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:43:07,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:43:07,727 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:43:07,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:43:07,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:07,791 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:43:07,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:43:07,849 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:43:07,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:43:07,879 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-03 01:43:07,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 01:43:07,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:07,917 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:43:07,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:43:07,961 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:08,483 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1489#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:08,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:08,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:08,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-03 01:43:08,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958742455] [2022-11-03 01:43:08,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:08,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:43:08,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:08,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:43:08,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:43:08,486 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2022-11-03 01:43:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:08,724 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-11-03 01:43:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:43:08,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) Word has length 18 [2022-11-03 01:43:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:08,726 INFO L225 Difference]: With dead ends: 67 [2022-11-03 01:43:08,726 INFO L226 Difference]: Without dead ends: 54 [2022-11-03 01:43:08,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 12 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:43:08,727 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:08,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 50 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:43:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-03 01:43:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2022-11-03 01:43:08,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2022-11-03 01:43:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-03 01:43:08,736 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 18 [2022-11-03 01:43:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:08,737 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-03 01:43:08,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2022-11-03 01:43:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-03 01:43:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:43:08,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:08,738 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:08,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:08,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:08,953 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:08,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1748691183, now seen corresponding path program 1 times [2022-11-03 01:43:08,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:08,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295204647] [2022-11-03 01:43:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:08,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:10,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:10,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295204647] [2022-11-03 01:43:10,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295204647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:10,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224345117] [2022-11-03 01:43:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:10,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:10,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:10,851 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:10,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:43:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:10,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 01:43:10,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:10,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:43:10,974 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:43:10,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-11-03 01:43:11,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 01:43:11,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 01:43:11,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-11-03 01:43:11,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:11,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-11-03 01:43:11,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:11,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 46 [2022-11-03 01:43:11,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:11,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 41 [2022-11-03 01:43:11,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:11,789 INFO L356 Elim1Store]: treesize reduction 25, result has 45.7 percent of original size [2022-11-03 01:43:11,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 68 [2022-11-03 01:43:11,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:11,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:11,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:11,921 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 01:43:11,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 49 treesize of output 53 [2022-11-03 01:43:12,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:12,523 INFO L356 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2022-11-03 01:43:12,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 40 [2022-11-03 01:43:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:12,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:15,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224345117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:15,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870010610] [2022-11-03 01:43:15,698 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:43:15,698 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:15,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:15,699 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:15,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:15,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,877 INFO L356 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-03 01:43:15,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-11-03 01:43:15,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:43:15,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:15,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:16,077 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:43:16,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:43:16,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:16,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:16,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:43:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:16,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:16,275 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:43:16,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 416 treesize of output 412 [2022-11-03 01:43:16,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:43:16,385 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:43:16,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:43:16,452 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:43:16,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:43:16,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,530 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:43:16,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 01:43:16,599 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:43:16,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:43:16,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,636 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:43:16,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:43:16,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,677 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:43:16,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:43:16,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:16,717 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:43:16,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:43:16,849 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:18,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1839#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:18,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:18,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:18,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 48 [2022-11-03 01:43:18,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688861113] [2022-11-03 01:43:18,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:18,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:43:18,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:18,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:43:18,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2649, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 01:43:18,354 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:21,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:21,044 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-11-03 01:43:21,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 01:43:21,045 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 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 20 [2022-11-03 01:43:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:21,045 INFO L225 Difference]: With dead ends: 44 [2022-11-03 01:43:21,045 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 01:43:21,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=363, Invalid=4059, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 01:43:21,048 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:21,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-03 01:43:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 01:43:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2022-11-03 01:43:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-03 01:43:21,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 20 [2022-11-03 01:43:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:21,055 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-03 01:43:21,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-03 01:43:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 01:43:21,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:21,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:21,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:21,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:21,271 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:21,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:21,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1643001400, now seen corresponding path program 7 times [2022-11-03 01:43:21,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:21,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549305908] [2022-11-03 01:43:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:21,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:23,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:23,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549305908] [2022-11-03 01:43:23,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549305908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:23,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854705607] [2022-11-03 01:43:23,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:43:23,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:23,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:23,830 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:23,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:43:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:23,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-03 01:43:23,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:23,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 01:43:23,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:43:23,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 01:43:23,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:23,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:43:24,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 47 [2022-11-03 01:43:24,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:24,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2022-11-03 01:43:24,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:24,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 57 [2022-11-03 01:43:24,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:24,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 54 [2022-11-03 01:43:24,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 65 treesize of output 54 [2022-11-03 01:43:24,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:24,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 65 treesize of output 56 [2022-11-03 01:43:25,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,028 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-03 01:43:25,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 56 [2022-11-03 01:43:25,215 INFO L356 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2022-11-03 01:43:25,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-11-03 01:43:31,216 WARN L234 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 40 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:43:31,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:31,262 INFO L356 Elim1Store]: treesize reduction 53, result has 26.4 percent of original size [2022-11-03 01:43:31,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 49 treesize of output 62 [2022-11-03 01:43:33,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:33,288 INFO L356 Elim1Store]: treesize reduction 53, result has 26.4 percent of original size [2022-11-03 01:43:33,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 43 treesize of output 60 [2022-11-03 01:43:37,362 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:37,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 68 [2022-11-03 01:43:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:37,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:38,152 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_520 Int) (|v_ULTIMATE.start_main_~i~0#1_296| Int) (v_ArrVal_519 Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_296|)) (= (+ c_~N~0 2) (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_519) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_296|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_520) |c_ULTIMATE.start_main_~b~0#1.offset|)))) is different from false [2022-11-03 01:43:40,184 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_520 Int) (|v_ULTIMATE.start_main_~i~0#1_297| Int) (|v_ULTIMATE.start_main_~i~0#1_296| Int) (|ULTIMATE.start_main_~b~0#1.base| Int) (v_ArrVal_519 Int)) (or (= (+ c_~N~0 2) (select (store (store (let ((.cse0 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_297|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_519) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_296|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_520) |c_ULTIMATE.start_main_~b~0#1.offset|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_297| 1) |v_ULTIMATE.start_main_~i~0#1_296|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_297|)))) is different from false [2022-11-03 01:43:43,784 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_520 Int) (|v_ULTIMATE.start_main_~i~0#1_297| Int) (|v_ULTIMATE.start_main_~i~0#1_296| Int) (|v_ULTIMATE.start_main_~i~0#1_299| Int) (|ULTIMATE.start_main_~b~0#1.base| Int) (v_ArrVal_519 Int) (v_ArrVal_514 Int) (v_ArrVal_512 Int)) (or (= (+ c_~N~0 2) (select (store (store (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_512) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_299|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_514))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_297|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_519) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_296|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_520) |c_ULTIMATE.start_main_~b~0#1.offset|)) (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_297|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_297| 1) |v_ULTIMATE.start_main_~i~0#1_296|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_299|)))) is different from false [2022-11-03 01:43:45,819 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_520 Int) (|v_ULTIMATE.start_main_~i~0#1_297| Int) (|v_ULTIMATE.start_main_~i~0#1_296| Int) (|v_ULTIMATE.start_main_~i~0#1_299| Int) (|ULTIMATE.start_main_~b~0#1.base| Int) (v_ArrVal_519 Int) (v_ArrVal_514 Int) (v_ArrVal_512 Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_297|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_297| 1) |v_ULTIMATE.start_main_~i~0#1_296|)) (= (+ c_~N~0 2) (select (store (store (let ((.cse0 (store (let ((.cse3 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (+ .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse1 .cse2 (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse1 .cse2)))) (+ .cse3 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_512)) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_299|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_514))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_297|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_519) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_296|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_520) |c_ULTIMATE.start_main_~b~0#1.offset|)) (not (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) |v_ULTIMATE.start_main_~i~0#1_299|)))) is different from false [2022-11-03 01:43:51,377 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse12 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse12))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse6 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse9 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse8 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))) (let ((.cse7 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (let ((.cse0 (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7 .cse8 .cse9))))) (let ((.cse2 (let ((.cse5 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse6 .cse7 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse8 .cse9))))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_299| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_297| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_297|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_296| Int)) (or (forall ((v_ArrVal_520 Int) (|ULTIMATE.start_main_~b~0#1.base| Int) (v_ArrVal_519 Int) (v_ArrVal_514 Int) (v_ArrVal_512 Int)) (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) (select (store (store (let ((.cse1 (store (store .cse2 .cse3 v_ArrVal_512) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_299|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_514))) (store (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_297|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_519) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_296|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_520) |c_ULTIMATE.start_main_~b~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_297| 1) |v_ULTIMATE.start_main_~i~0#1_296|)))))) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_299|)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_299| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_297| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_297|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_296| Int)) (or (forall ((v_ArrVal_520 Int) (|ULTIMATE.start_main_~b~0#1.base| Int) (v_ArrVal_519 Int) (v_ArrVal_514 Int) (v_ArrVal_512 Int)) (< (select (store (store (let ((.cse4 (store (store .cse2 .cse3 v_ArrVal_512) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_299|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_514))) (store (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_297|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_519) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_296|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_520) |c_ULTIMATE.start_main_~b~0#1.offset|) (+ |c_ULTIMATE.start_main_~i~0#1| 4))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_297| 1) |v_ULTIMATE.start_main_~i~0#1_296|)))))) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_299|))))))))))))) is different from false [2022-11-03 01:43:53,479 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse12 (let ((.cse13 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse13 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse13 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse12))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse6 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse7 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse9 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))) (let ((.cse8 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (let ((.cse0 (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7 .cse8 .cse9))))) (let ((.cse2 (let ((.cse5 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse6 .cse7 .cse8 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse9))))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_299| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_297| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_297|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_296| Int)) (or (forall ((v_ArrVal_520 Int) (|ULTIMATE.start_main_~b~0#1.base| Int) (v_ArrVal_519 Int) (v_ArrVal_514 Int) (v_ArrVal_512 Int)) (< (select (store (store (let ((.cse1 (store (store .cse2 .cse3 v_ArrVal_512) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_299|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_514))) (store (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_297|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_519) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_296|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_520) |c_ULTIMATE.start_main_~b~0#1.offset|) (+ 5 |c_ULTIMATE.start_main_~i~0#1|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_297| 1) |v_ULTIMATE.start_main_~i~0#1_296|)))))) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_299|)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_299| Int)) (or (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_299|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_297| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_297|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_296| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_297| 1) |v_ULTIMATE.start_main_~i~0#1_296|)) (forall ((v_ArrVal_520 Int) (|ULTIMATE.start_main_~b~0#1.base| Int) (v_ArrVal_519 Int) (v_ArrVal_514 Int) (v_ArrVal_512 Int)) (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) (select (store (store (let ((.cse4 (store (store .cse2 .cse3 v_ArrVal_512) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_299|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_514))) (store (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_297|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_519) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_296|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_520) |c_ULTIMATE.start_main_~b~0#1.offset|)))))))))))))))))) is different from false [2022-11-03 01:43:55,572 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse12 (let ((.cse13 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse13 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse13 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse13 16 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse12))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse6 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse7 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse8 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))) (let ((.cse9 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (let ((.cse0 (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7 .cse8 .cse9))))) (let ((.cse2 (let ((.cse5 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse6 .cse7 .cse8 .cse9 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_299| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_297| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_297|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_296| Int)) (or (forall ((v_ArrVal_520 Int) (|ULTIMATE.start_main_~b~0#1.base| Int) (v_ArrVal_519 Int) (v_ArrVal_514 Int) (v_ArrVal_512 Int)) (< (select (store (store (let ((.cse1 (store (store .cse2 .cse3 v_ArrVal_512) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_299|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_514))) (store (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_297|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_519) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_296|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_520) |c_ULTIMATE.start_main_~b~0#1.offset|) (+ 6 |c_ULTIMATE.start_main_~i~0#1|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_297| 1) |v_ULTIMATE.start_main_~i~0#1_296|)))))) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_299|)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_299| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_297| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_297|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_296| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_297| 1) |v_ULTIMATE.start_main_~i~0#1_296|)) (forall ((v_ArrVal_520 Int) (|ULTIMATE.start_main_~b~0#1.base| Int) (v_ArrVal_519 Int) (v_ArrVal_514 Int) (v_ArrVal_512 Int)) (< (+ |c_ULTIMATE.start_main_~i~0#1| 4) (select (store (store (let ((.cse4 (store (store .cse2 .cse3 v_ArrVal_512) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_299|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_514))) (store (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_297|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_519) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_296|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_520) |c_ULTIMATE.start_main_~b~0#1.offset|))))))) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_299|))))))))))))) is different from false [2022-11-03 01:43:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2022-11-03 01:43:55,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854705607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:55,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534835612] [2022-11-03 01:43:55,630 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:43:55,630 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:55,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:55,631 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:55,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:55,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,818 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:43:55,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:43:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:43:55,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:43:55,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:43:56,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:56,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:56,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:56,109 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:43:56,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 416 treesize of output 412 [2022-11-03 01:43:56,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:43:56,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:56,242 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 01:43:56,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:43:56,314 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:43:56,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:43:56,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:56,374 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:43:56,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 01:43:56,441 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:43:56,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:43:56,471 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-03 01:43:56,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 01:43:56,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:56,507 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:43:56,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:43:56,548 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:58,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2162#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:58,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:58,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:43:58,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 53 [2022-11-03 01:43:58,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826296029] [2022-11-03 01:43:58,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:58,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-03 01:43:58,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-03 01:43:58,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2327, Unknown=9, NotChecked=728, Total=3306 [2022-11-03 01:43:58,112 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:37,038 WARN L234 SmtUtils]: Spent 36.27s on a formula simplification. DAG size of input: 86 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:44:47,399 WARN L234 SmtUtils]: Spent 10.03s on a formula simplification. DAG size of input: 61 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:44:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:51,485 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-11-03 01:44:51,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 01:44:51,486 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 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 21 [2022-11-03 01:44:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:51,487 INFO L225 Difference]: With dead ends: 57 [2022-11-03 01:44:51,487 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 01:44:51,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 16 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 7 IntricatePredicates, 1 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 85.5s TimeCoverageRelationStatistics Valid=323, Invalid=3118, Unknown=9, NotChecked=840, Total=4290 [2022-11-03 01:44:51,489 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:51,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 64 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-11-03 01:44:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 01:44:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-11-03 01:44:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-11-03 01:44:51,512 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 21 [2022-11-03 01:44:51,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:51,513 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-11-03 01:44:51,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:51,513 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-11-03 01:44:51,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 01:44:51,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:51,515 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:51,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:51,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:51,717 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:51,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1720185625, now seen corresponding path program 8 times [2022-11-03 01:44:51,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:51,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498417067] [2022-11-03 01:44:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:51,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:44:51,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:51,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498417067] [2022-11-03 01:44:51,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498417067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:51,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849168925] [2022-11-03 01:44:51,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:51,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:51,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:51,888 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:51,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:44:52,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:44:52,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:52,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:44:52,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:44:52,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:44:52,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849168925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:52,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1415600910] [2022-11-03 01:44:52,453 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:44:52,453 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:44:52,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:44:52,453 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:44:52,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:44:52,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:44:52,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,682 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 01:44:52,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 01:44:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 01:44:52,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 01:44:52,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:52,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:52,901 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 01:44:52,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 416 treesize of output 412 [2022-11-03 01:44:52,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:44:53,045 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:44:53,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:44:53,157 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 01:44:53,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:44:53,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:53,238 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 01:44:53,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 01:44:53,323 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 01:44:53,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 01:44:53,369 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-03 01:44:53,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 01:44:53,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:53,418 INFO L356 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-03 01:44:53,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-03 01:44:53,463 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:54,321 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2535#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:54,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:54,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:44:54,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-11-03 01:44:54,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906289310] [2022-11-03 01:44:54,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:54,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 01:44:54,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:54,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 01:44:54,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:44:54,324 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:54,981 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2022-11-03 01:44:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:44:54,982 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 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 22 [2022-11-03 01:44:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:54,983 INFO L225 Difference]: With dead ends: 103 [2022-11-03 01:44:54,983 INFO L226 Difference]: Without dead ends: 76 [2022-11-03 01:44:54,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 14 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=301, Invalid=1591, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 01:44:54,985 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 156 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:54,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 153 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:44:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-03 01:44:55,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 47. [2022-11-03 01:44:55,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-11-03 01:44:55,018 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 22 [2022-11-03 01:44:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:55,019 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-11-03 01:44:55,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-11-03 01:44:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 01:44:55,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:55,021 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:55,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:55,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:55,227 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1212573997, now seen corresponding path program 2 times [2022-11-03 01:44:55,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:55,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700430086] [2022-11-03 01:44:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:59,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:59,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700430086] [2022-11-03 01:44:59,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700430086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:59,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902494404] [2022-11-03 01:44:59,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:44:59,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:59,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:59,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:59,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e6f95d-640d-4fb1-bd85-8ec7b5b123d2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:44:59,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:44:59,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-03 01:44:59,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:59,701 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:44:59,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2022-11-03 01:44:59,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 01:44:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:59,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 01:44:59,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:59,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:59,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:59,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 01:45:00,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 01:45:00,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-03 01:45:00,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:00,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 01:45:00,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:00,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2022-11-03 01:45:00,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:00,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-11-03 01:45:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:00,586 INFO L356 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-03 01:45:00,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 57 [2022-11-03 01:45:01,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:01,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2022-11-03 01:45:01,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:01,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:01,175 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 01:45:01,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 59 treesize of output 55 [2022-11-03 01:45:01,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:01,421 INFO L356 Elim1Store]: treesize reduction 110, result has 28.1 percent of original size [2022-11-03 01:45:01,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 70 treesize of output 81 [2022-11-03 01:45:02,524 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-03 01:45:02,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 42 [2022-11-03 01:45:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:45:02,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:06,327 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:46:06,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1004 treesize of output 812 [2022-11-03 01:46:06,371 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_684 Int) (v_arrayElimArr_1 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_376| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_372| Int) (v_ArrVal_689 Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse0 (+ c_~N~0 2)) (.cse1 (store (let ((.cse5 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse6 (store (let ((.cse9 (select .cse7 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse8 (store .cse9 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse8 .cse5 (+ (select .cse9 .cse5) (select (select (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| .cse8) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_376|)) v_ArrVal_684))) (let ((.cse4 (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| .cse6))) (let ((.cse3 (store (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ 1 (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (store .cse3 .cse2 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 1)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_372|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_689))) (or (= .cse0 (select .cse1 .cse2)) (not (= .cse0 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|))) (< (+ |v_ULTIMATE.start_main_~i~0#1_372| 1) c_~N~0) (< (+ |v_ULTIMATE.start_main_~i~0#1_376| 1) c_~N~0))))) (not (< 1 c_~N~0))) is different from false [2022-11-03 01:46:13,377 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_674 Int) (v_ArrVal_684 Int) (|v_ULTIMATE.start_main_~i~0#1_384| Int) (v_arrayElimArr_1 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_376| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_372| Int) (v_ArrVal_689 Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse1 (store (let ((.cse5 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_384|)) v_ArrVal_674)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse6 (store (let ((.cse9 (select .cse7 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse8 (store .cse9 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse8 .cse5 (+ (select (select (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| .cse8) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse9 .cse5))))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_376|)) v_ArrVal_684))) (let ((.cse4 (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| .cse6))) (let ((.cse3 (store (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (store .cse3 .cse2 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 1)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_372|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_689))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|))) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_384|)) (< (+ 3 |v_ULTIMATE.start_main_~i~0#1_376|) .cse0) (< (+ 3 |v_ULTIMATE.start_main_~i~0#1_372|) .cse0) (= .cse0 (select .cse1 .cse2)) (< (+ 3 |v_ULTIMATE.start_main_~i~0#1_384|) .cse0) (not (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_384|) .cse0)) (not (< 3 .cse0))))))) is different from false [2022-11-03 01:46:13,512 INFO L356 Elim1Store]: treesize reduction 63, result has 37.6 percent of original size [2022-11-03 01:46:13,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 9180 treesize of output 2980 [2022-11-03 01:46:13,668 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:46:13,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56308 treesize of output 51800 [2022-11-03 01:46:14,271 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:46:14,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51717 treesize of output 46975 [2022-11-03 01:46:19,155 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:46:19,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 29518 treesize of output 27738