./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_reverse_ground.i --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_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/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_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_reverse_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/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_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/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 cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 --- 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 02:50:48,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:50:48,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:50:48,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:50:48,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:50:48,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:50:48,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:50:48,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:50:48,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:50:48,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:50:48,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:50:48,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:50:48,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:50:48,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:50:48,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:50:48,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:50:48,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:50:48,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:50:48,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:50:48,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:50:48,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:50:48,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:50:48,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:50:48,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:50:48,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:50:48,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:50:48,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:50:48,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:50:48,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:50:48,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:50:48,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:50:48,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:50:48,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:50:48,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:50:48,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:50:48,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:50:48,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:50:48,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:50:48,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:50:48,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:50:48,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:50:48,973 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:50:48,995 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:50:48,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:50:48,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:50:48,996 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:50:48,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:50:48,997 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:50:48,998 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:50:48,998 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:50:48,998 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:50:48,998 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:50:48,999 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:50:48,999 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:50:48,999 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:50:48,999 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:50:49,000 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:50:49,000 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:50:49,000 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:50:49,000 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:50:49,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:50:49,001 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:50:49,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:50:49,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:50:49,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:50:49,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:50:49,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:50:49,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:50:49,003 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:50:49,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:50:49,003 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:50:49,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:50:49,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:50:49,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:50:49,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:50:49,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:50:49,005 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:50:49,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:50:49,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:50:49,006 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:50:49,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:50:49,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:50:49,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:50:49,006 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_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 [2022-11-03 02:50:49,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:50:49,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:50:49,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:50:49,354 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:50:49,355 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:50:49,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/standard_reverse_ground.i [2022-11-03 02:50:49,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/data/5e19aef89/ed2e19d7d2a34dae9698298570d337ba/FLAG212c52678 [2022-11-03 02:50:50,016 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:50:50,016 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2022-11-03 02:50:50,023 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/data/5e19aef89/ed2e19d7d2a34dae9698298570d337ba/FLAG212c52678 [2022-11-03 02:50:50,382 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/data/5e19aef89/ed2e19d7d2a34dae9698298570d337ba [2022-11-03 02:50:50,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:50:50,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:50:50,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:50:50,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:50:50,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:50:50,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b822171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50, skipping insertion in model container [2022-11-03 02:50:50,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:50:50,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:50:50,610 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_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2022-11-03 02:50:50,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:50:50,652 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:50:50,671 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_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2022-11-03 02:50:50,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:50:50,714 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:50:50,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50 WrapperNode [2022-11-03 02:50:50,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:50:50,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:50:50,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:50:50,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:50:50,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,764 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2022-11-03 02:50:50,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:50:50,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:50:50,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:50:50,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:50:50,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,811 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:50:50,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:50:50,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:50:50,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:50:50,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50" (1/1) ... [2022-11-03 02:50:50,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:50:50,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:50,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:50:50,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:50:50,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:50:50,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:50:50,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:50:50,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:50:50,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:50:50,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:50:50,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:50:50,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:50:51,002 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:50:51,004 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:50:51,225 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:50:51,282 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:50:51,282 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:50:51,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:50:51 BoogieIcfgContainer [2022-11-03 02:50:51,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:50:51,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:50:51,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:50:51,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:50:51,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:50:50" (1/3) ... [2022-11-03 02:50:51,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62696c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:50:51, skipping insertion in model container [2022-11-03 02:50:51,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:50" (2/3) ... [2022-11-03 02:50:51,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62696c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:50:51, skipping insertion in model container [2022-11-03 02:50:51,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:50:51" (3/3) ... [2022-11-03 02:50:51,300 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2022-11-03 02:50:51,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:50:51,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:50:51,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:50:51,417 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;@5b291311, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:50:51,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:50:51,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:50:51,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:51,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 02:50:51,430 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:51,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:51,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1598963128, now seen corresponding path program 1 times [2022-11-03 02:50:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:51,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201746623] [2022-11-03 02:50:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:51,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:51,736 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 02:50:51,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:51,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201746623] [2022-11-03 02:50:51,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201746623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:51,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:51,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:50:51,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223787218] [2022-11-03 02:50:51,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:51,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:51,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:51,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:51,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:50:51,782 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 02:50:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:51,825 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-03 02:50:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:51,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-11-03 02:50:51,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:51,837 INFO L225 Difference]: With dead ends: 18 [2022-11-03 02:50:51,837 INFO L226 Difference]: Without dead ends: 10 [2022-11-03 02:50:51,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:50:51,844 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:51,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:50:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-03 02:50:51,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-03 02:50:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-03 02:50:51,882 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-03 02:50:51,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:51,883 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-03 02:50:51,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 02:50:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-03 02:50:51,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:50:51,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:51,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:51,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:50:51,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:51,890 INFO L85 PathProgramCache]: Analyzing trace with hash 757882845, now seen corresponding path program 1 times [2022-11-03 02:50:51,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:51,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222110112] [2022-11-03 02:50:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:51,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:50:52,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:52,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222110112] [2022-11-03 02:50:52,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222110112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:52,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142365657] [2022-11-03 02:50:52,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:52,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:52,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:52,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:52,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:50:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:52,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:50:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:50:52,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:50:52,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142365657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:52,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487454364] [2022-11-03 02:50:52,366 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:50:52,366 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:50:52,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:50:52,378 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:50:52,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:50:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:52,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:52,598 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 02:50:52,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 02:50:52,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:52,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:52,684 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:50:52,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 02:50:52,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:52,734 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 02:50:52,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:52,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:52,933 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:50:52,934 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 4 case distinctions, treesize of input 242 treesize of output 241 [2022-11-03 02:50:53,263 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 02:50:53,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:53,293 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 17 treesize of output 17 [2022-11-03 02:50:53,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:53,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:53,383 INFO L356 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2022-11-03 02:50:53,384 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 5 case distinctions, treesize of input 72 treesize of output 83 [2022-11-03 02:50:53,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:53,466 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 25 treesize of output 25 [2022-11-03 02:50:53,486 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:50:53,685 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-03 02:50:53,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:50:53,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:50:53,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 02:50:53,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422143874] [2022-11-03 02:50:53,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:50:53,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:50:53,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:53,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:50:53,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:50:53,689 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 02:50:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:53,753 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-11-03 02:50:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:50:53,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:50:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:53,755 INFO L225 Difference]: With dead ends: 23 [2022-11-03 02:50:53,755 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 02:50:53,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:50:53,757 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:53,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:50:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 02:50:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-03 02:50:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-03 02:50:53,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-03 02:50:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:53,762 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-03 02:50:53,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 02:50:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-03 02:50:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 02:50:53,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:53,763 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:53,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:53,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:53,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:53,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:53,982 INFO L85 PathProgramCache]: Analyzing trace with hash 910138760, now seen corresponding path program 2 times [2022-11-03 02:50:53,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:53,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315103076] [2022-11-03 02:50:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:53,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:50:54,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:54,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315103076] [2022-11-03 02:50:54,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315103076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:54,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251565575] [2022-11-03 02:50:54,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:50:54,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:54,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:54,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:54,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:50:54,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:50:54,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:50:54,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:50:54,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:54,251 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 02:50:54,312 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 24 [2022-11-03 02:50:54,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:54,474 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 02:50:54,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 23 [2022-11-03 02:50:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:50:54,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:54,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251565575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:54,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:50:54,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-03 02:50:54,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152625483] [2022-11-03 02:50:54,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:54,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:50:54,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:54,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:50:54,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:50:54,503 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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 02:50:54,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:54,547 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-11-03 02:50:54,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:50:54,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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 14 [2022-11-03 02:50:54,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:54,549 INFO L225 Difference]: With dead ends: 22 [2022-11-03 02:50:54,549 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 02:50:54,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:50:54,557 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:54,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-11-03 02:50:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 02:50:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-11-03 02:50:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:50:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-11-03 02:50:54,572 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2022-11-03 02:50:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:54,573 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-11-03 02:50:54,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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 02:50:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-11-03 02:50:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:50:54,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:54,575 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:54,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:54,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:54,791 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:54,791 INFO L85 PathProgramCache]: Analyzing trace with hash -179519022, now seen corresponding path program 1 times [2022-11-03 02:50:54,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:54,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130577661] [2022-11-03 02:50:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:54,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:50:55,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:55,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130577661] [2022-11-03 02:50:55,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130577661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557412269] [2022-11-03 02:50:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:55,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:55,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:55,003 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:55,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:50:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:55,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:50:55,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:50:55,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:50:55,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557412269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:55,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168350077] [2022-11-03 02:50:55,210 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:50:55,210 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:50:55,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:50:55,211 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:50:55,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:50:55,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,287 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 02:50:55,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 02:50:55,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,353 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:50:55,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 02:50:55,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,389 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 31 treesize of output 33 [2022-11-03 02:50:55,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,532 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:50:55,532 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 3 case distinctions, treesize of input 252 treesize of output 240 [2022-11-03 02:50:55,607 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 02:50:55,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,629 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 17 treesize of output 17 [2022-11-03 02:50:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,702 INFO L356 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2022-11-03 02:50:55,703 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 5 case distinctions, treesize of input 72 treesize of output 83 [2022-11-03 02:50:55,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,749 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 25 treesize of output 25 [2022-11-03 02:50:55,862 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:50:56,362 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '396#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-03 02:50:56,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:50:56,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:50:56,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-03 02:50:56,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893810249] [2022-11-03 02:50:56,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:50:56,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:50:56,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:56,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:50:56,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:50:56,364 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 02:50:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:56,460 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-11-03 02:50:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:50:56,461 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 17 [2022-11-03 02:50:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:56,463 INFO L225 Difference]: With dead ends: 42 [2022-11-03 02:50:56,463 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 02:50:56,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:50:56,467 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:56,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:50:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 02:50:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-03 02:50:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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 02:50:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-11-03 02:50:56,488 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-11-03 02:50:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:56,489 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-11-03 02:50:56,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 02:50:56,489 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-11-03 02:50:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 02:50:56,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:56,491 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:56,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:56,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:56,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:56,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:56,707 INFO L85 PathProgramCache]: Analyzing trace with hash -830818062, now seen corresponding path program 2 times [2022-11-03 02:50:56,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:56,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934880040] [2022-11-03 02:50:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:56,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:50:57,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:57,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934880040] [2022-11-03 02:50:57,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934880040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:57,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937774143] [2022-11-03 02:50:57,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:50:57,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:57,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:57,049 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:57,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:50:57,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:50:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:50:57,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:50:57,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:57,186 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 02:50:57,245 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 25 treesize of output 25 [2022-11-03 02:50:57,281 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 37 treesize of output 39 [2022-11-03 02:50:57,503 INFO L356 Elim1Store]: treesize reduction 14, result has 33.3 percent of original size [2022-11-03 02:50:57,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 26 [2022-11-03 02:50:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 02:50:57,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:57,732 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:50:57,733 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 492 treesize of output 456 [2022-11-03 02:50:57,757 INFO L356 Elim1Store]: treesize reduction 31, result has 11.4 percent of original size [2022-11-03 02:50:57,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1338 treesize of output 1046 [2022-11-03 02:51:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-03 02:51:01,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937774143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:01,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [917086155] [2022-11-03 02:51:01,892 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:51:01,892 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:51:01,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:51:01,893 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:51:01,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:51:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:01,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:01,950 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:51:01,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 02:51:01,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:01,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:01,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:51:01,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:01,996 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 31 treesize of output 33 [2022-11-03 02:51:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:02,081 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:51:02,089 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 3 case distinctions, treesize of input 252 treesize of output 240 [2022-11-03 02:51:02,154 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 02:51:02,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:02,169 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 25 treesize of output 25 [2022-11-03 02:51:02,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:02,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:02,219 INFO L356 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-11-03 02:51:02,220 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 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-03 02:51:02,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:02,265 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 25 treesize of output 25 [2022-11-03 02:51:02,353 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:51:02,954 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '720#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-03 02:51:02,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:51:02,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:51:02,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2022-11-03 02:51:02,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539490867] [2022-11-03 02:51:02,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:02,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:51:02,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:02,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:51:02,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:51:02,957 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 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 02:51:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:03,812 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-11-03 02:51:03,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:51:03,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 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 29 [2022-11-03 02:51:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:03,816 INFO L225 Difference]: With dead ends: 56 [2022-11-03 02:51:03,816 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 02:51:03,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=604, Invalid=1946, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:51:03,818 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:03,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 31 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 67 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-03 02:51:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 02:51:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-11-03 02:51:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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 02:51:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-03 02:51:03,830 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2022-11-03 02:51:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:03,831 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-03 02:51:03,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 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 02:51:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-03 02:51:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:51:03,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:03,832 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 02:51:03,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:04,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:04,055 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:04,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:04,055 INFO L85 PathProgramCache]: Analyzing trace with hash 10578365, now seen corresponding path program 3 times [2022-11-03 02:51:04,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:04,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622049182] [2022-11-03 02:51:04,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:04,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:51:04,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:04,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622049182] [2022-11-03 02:51:04,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622049182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:04,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989443880] [2022-11-03 02:51:04,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:51:04,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:04,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:04,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:04,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:51:04,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:51:04,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:51:04,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:51:04,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:51:04,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:51:04,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989443880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:04,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [743653622] [2022-11-03 02:51:04,851 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:51:04,851 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:51:04,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:51:04,851 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:51:04,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:51:04,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:04,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:04,909 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 02:51:04,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 02:51:04,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:04,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:04,968 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:51:04,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 02:51:04,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:05,001 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 02:51:05,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:05,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:05,103 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:51:05,104 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 4 case distinctions, treesize of input 242 treesize of output 241 [2022-11-03 02:51:05,217 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 02:51:05,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:05,230 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 25 treesize of output 25 [2022-11-03 02:51:05,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:05,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:05,271 INFO L356 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-11-03 02:51:05,271 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 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-03 02:51:05,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:05,294 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 25 treesize of output 25 [2022-11-03 02:51:05,399 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:51:05,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1154#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-03 02:51:05,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:51:05,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:51:05,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-11-03 02:51:05,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126068503] [2022-11-03 02:51:05,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:05,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 02:51:05,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:05,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 02:51:05,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:51:05,953 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 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 02:51:06,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:06,162 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2022-11-03 02:51:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:51:06,163 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:51:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:06,167 INFO L225 Difference]: With dead ends: 83 [2022-11-03 02:51:06,167 INFO L226 Difference]: Without dead ends: 61 [2022-11-03 02:51:06,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:51:06,170 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:06,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:51:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-03 02:51:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-03 02:51:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 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 02:51:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-11-03 02:51:06,219 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 34 [2022-11-03 02:51:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:06,220 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-11-03 02:51:06,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 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 02:51:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-11-03 02:51:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 02:51:06,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:06,225 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 02:51:06,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 02:51:06,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:06,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:06,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:06,447 INFO L85 PathProgramCache]: Analyzing trace with hash 654932360, now seen corresponding path program 4 times [2022-11-03 02:51:06,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:06,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453448354] [2022-11-03 02:51:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:06,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-11-03 02:51:07,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:07,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453448354] [2022-11-03 02:51:07,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453448354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:07,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127139168] [2022-11-03 02:51:07,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:51:07,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:07,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:07,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:07,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:51:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:07,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:51:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-11-03 02:51:07,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-11-03 02:51:08,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127139168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:08,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184148555] [2022-11-03 02:51:08,671 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:51:08,671 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:51:08,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:51:08,672 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:51:08,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:51:08,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:08,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:08,736 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:51:08,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 02:51:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:08,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:08,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:51:08,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:08,780 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 31 treesize of output 33 [2022-11-03 02:51:08,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:08,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:08,862 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:51:08,862 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 3 case distinctions, treesize of input 252 treesize of output 240 [2022-11-03 02:51:08,936 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 02:51:08,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:08,949 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 25 treesize of output 25 [2022-11-03 02:51:08,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:08,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:08,987 INFO L356 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-11-03 02:51:08,987 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 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-03 02:51:09,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:09,014 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 25 treesize of output 25 [2022-11-03 02:51:09,106 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:51:09,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1831#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-03 02:51:09,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:51:09,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:51:09,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2022-11-03 02:51:09,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741726954] [2022-11-03 02:51:09,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:09,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-03 02:51:09,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:09,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-03 02:51:09,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1397, Invalid=1909, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:51:09,613 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 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 02:51:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:10,060 INFO L93 Difference]: Finished difference Result 148 states and 203 transitions. [2022-11-03 02:51:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-03 02:51:10,061 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 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 60 [2022-11-03 02:51:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:10,066 INFO L225 Difference]: With dead ends: 148 [2022-11-03 02:51:10,066 INFO L226 Difference]: Without dead ends: 113 [2022-11-03 02:51:10,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1397, Invalid=1909, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:51:10,071 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:10,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:51:10,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-03 02:51:10,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-11-03 02:51:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-11-03 02:51:10,124 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 60 [2022-11-03 02:51:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:10,124 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-11-03 02:51:10,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 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 02:51:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-11-03 02:51:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:51:10,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:10,127 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 02:51:10,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:10,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:51:10,343 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:10,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:10,343 INFO L85 PathProgramCache]: Analyzing trace with hash 246965928, now seen corresponding path program 5 times [2022-11-03 02:51:10,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:10,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682604890] [2022-11-03 02:51:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:10,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1282 trivial. 0 not checked. [2022-11-03 02:51:13,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:13,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682604890] [2022-11-03 02:51:13,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682604890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:13,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327998823] [2022-11-03 02:51:13,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:51:13,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:13,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:13,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:13,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:51:14,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:51:14,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:51:14,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:51:14,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:14,267 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 18 treesize of output 16 [2022-11-03 02:51:14,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:51:14,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-03 02:51:14,644 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 37 treesize of output 39 [2022-11-03 02:51:17,255 INFO L356 Elim1Store]: treesize reduction 14, result has 33.3 percent of original size [2022-11-03 02:51:17,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 26 [2022-11-03 02:51:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 144 proven. 109 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2022-11-03 02:51:17,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:17,990 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:51:17,990 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 1104 treesize of output 1036 [2022-11-03 02:51:18,024 INFO L356 Elim1Store]: treesize reduction 31, result has 11.4 percent of original size [2022-11-03 02:51:18,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9054 treesize of output 7762 [2022-11-03 02:57:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 2403 trivial. 0 not checked. [2022-11-03 02:57:41,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327998823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:57:41,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012912211] [2022-11-03 02:57:41,907 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:57:41,907 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:57:41,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:57:41,908 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:57:41,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:57:41,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:41,982 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 02:57:41,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 02:57:41,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:42,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:42,054 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:57:42,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 02:57:42,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:42,085 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 02:57:42,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:42,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:57:42,174 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:57:42,176 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 4 case distinctions, treesize of input 242 treesize of output 241 [2022-11-03 02:57:42,281 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 02:57:42,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:42,297 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 25 treesize of output 25 [2022-11-03 02:57:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:42,338 INFO L356 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-11-03 02:57:42,339 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 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-03 02:57:42,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:57:42,360 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 25 treesize of output 25 [2022-11-03 02:57:42,416 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:57:43,174 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3070#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-03 02:57:43,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:57:43,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:57:43,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 11, 9] total 68 [2022-11-03 02:57:43,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408139676] [2022-11-03 02:57:43,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:57:43,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-03 02:57:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:57:43,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-03 02:57:43,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1722, Invalid=3679, Unknown=1, NotChecked=0, Total=5402 [2022-11-03 02:57:43,178 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 69 states, 69 states have (on average 1.289855072463768) internal successors, (89), 68 states have internal predecessors, (89), 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 02:57:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:57:52,147 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2022-11-03 02:57:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-03 02:57:52,148 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.289855072463768) internal successors, (89), 68 states have internal predecessors, (89), 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 112 [2022-11-03 02:57:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:57:52,149 INFO L225 Difference]: With dead ends: 182 [2022-11-03 02:57:52,149 INFO L226 Difference]: Without dead ends: 121 [2022-11-03 02:57:52,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6637 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=8857, Invalid=21591, Unknown=2, NotChecked=0, Total=30450 [2022-11-03 02:57:52,158 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:57:52,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 61 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 121 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-11-03 02:57:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-03 02:57:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-11-03 02:57:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 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 02:57:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2022-11-03 02:57:52,192 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 112 [2022-11-03 02:57:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:57:52,193 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2022-11-03 02:57:52,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.289855072463768) internal successors, (89), 68 states have internal predecessors, (89), 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 02:57:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2022-11-03 02:57:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 02:57:52,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:57:52,195 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-03 02:57:52,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:57:52,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:57:52,407 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:57:52,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:57:52,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1611831811, now seen corresponding path program 6 times [2022-11-03 02:57:52,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:57:52,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159123662] [2022-11-03 02:57:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:57:52,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:57:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:57:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 1341 trivial. 0 not checked. [2022-11-03 02:57:55,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:57:55,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159123662] [2022-11-03 02:57:55,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159123662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:57:55,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715675560] [2022-11-03 02:57:55,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:57:55,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:57:55,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:57:55,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:57:55,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:57:56,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:57:56,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:57:56,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:57:56,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:57:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 1341 trivial. 0 not checked. [2022-11-03 02:57:56,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:58:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 1341 trivial. 0 not checked. [2022-11-03 02:58:00,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715675560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:58:00,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043187672] [2022-11-03 02:58:00,230 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:58:00,230 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:58:00,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:58:00,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:58:00,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:58:00,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:00,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:00,288 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:58:00,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 02:58:00,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:00,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:00,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:58:00,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:00,326 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 31 treesize of output 33 [2022-11-03 02:58:00,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:00,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:00,392 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:58:00,392 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 3 case distinctions, treesize of input 252 treesize of output 240 [2022-11-03 02:58:00,444 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 02:58:00,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:00,456 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 25 treesize of output 25 [2022-11-03 02:58:00,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:00,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:00,494 INFO L356 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-11-03 02:58:00,495 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 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-03 02:58:00,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:00,526 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 25 treesize of output 25 [2022-11-03 02:58:00,590 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:58:01,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4652#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-03 02:58:01,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:58:01,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:58:01,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 106 [2022-11-03 02:58:01,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354223143] [2022-11-03 02:58:01,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:58:01,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-03 02:58:01,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:58:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-03 02:58:01,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5690, Invalid=6742, Unknown=0, NotChecked=0, Total=12432 [2022-11-03 02:58:01,304 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:02,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:58:02,486 INFO L93 Difference]: Finished difference Result 289 states and 398 transitions. [2022-11-03 02:58:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-03 02:58:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-03 02:58:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:58:02,488 INFO L225 Difference]: With dead ends: 289 [2022-11-03 02:58:02,488 INFO L226 Difference]: Without dead ends: 224 [2022-11-03 02:58:02,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5690, Invalid=6742, Unknown=0, NotChecked=0, Total=12432 [2022-11-03 02:58:02,491 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:58:02,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:58:02,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-03 02:58:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-11-03 02:58:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0134529147982063) internal successors, (226), 223 states have internal predecessors, (226), 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 02:58:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2022-11-03 02:58:02,563 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 117 [2022-11-03 02:58:02,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:58:02,564 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2022-11-03 02:58:02,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:58:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2022-11-03 02:58:02,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-03 02:58:02,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:58:02,567 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-03 02:58:02,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:58:02,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:58:02,776 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:58:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:58:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1434658002, now seen corresponding path program 7 times [2022-11-03 02:58:02,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:58:02,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051664693] [2022-11-03 02:58:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:02,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:58:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10935 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 5475 trivial. 0 not checked. [2022-11-03 02:58:13,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:58:13,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051664693] [2022-11-03 02:58:13,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051664693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:58:13,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001856483] [2022-11-03 02:58:13,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:58:13,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:58:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:58:13,684 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:58:13,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:58:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:58:14,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-03 02:58:14,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:58:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10935 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 5475 trivial. 0 not checked. [2022-11-03 02:58:14,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:58:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10935 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 5475 trivial. 0 not checked. [2022-11-03 02:58:29,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001856483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:58:29,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207189600] [2022-11-03 02:58:29,805 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:58:29,805 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:58:29,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:58:29,806 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:58:29,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:58:29,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:29,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:29,864 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:58:29,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 02:58:29,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:29,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:29,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 02:58:29,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:29,902 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 02:58:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:29,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:58:29,983 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:58:29,983 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 4 case distinctions, treesize of input 242 treesize of output 241 [2022-11-03 02:58:30,069 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 02:58:30,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:30,083 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 17 treesize of output 17 [2022-11-03 02:58:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:30,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:30,143 INFO L356 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2022-11-03 02:58:30,144 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 5 case distinctions, treesize of input 72 treesize of output 83 [2022-11-03 02:58:30,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:58:30,186 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 25 treesize of output 25 [2022-11-03 02:58:30,332 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:58:31,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7199#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (or (and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-03 02:58:31,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:58:31,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:58:31,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 212 [2022-11-03 02:58:31,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531450012] [2022-11-03 02:58:31,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:58:31,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-11-03 02:58:31,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:58:31,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-11-03 02:58:31,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22598, Invalid=24708, Unknown=0, NotChecked=0, Total=47306 [2022-11-03 02:58:31,361 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand has 213 states, 213 states have (on average 1.0375586854460095) internal successors, (221), 212 states have internal predecessors, (221), 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 02:58:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:58:39,395 INFO L93 Difference]: Finished difference Result 554 states and 769 transitions. [2022-11-03 02:58:39,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-11-03 02:58:39,396 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.0375586854460095) internal successors, (221), 212 states have internal predecessors, (221), 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 223 [2022-11-03 02:58:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:58:39,399 INFO L225 Difference]: With dead ends: 554 [2022-11-03 02:58:39,399 INFO L226 Difference]: Without dead ends: 436 [2022-11-03 02:58:39,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1991 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=22598, Invalid=24708, Unknown=0, NotChecked=0, Total=47306 [2022-11-03 02:58:39,405 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 1277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1277 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:58:39,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1277 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:58:39,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-03 02:58:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-11-03 02:58:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.006896551724138) internal successors, (438), 435 states have internal predecessors, (438), 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 02:58:39,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 438 transitions. [2022-11-03 02:58:39,629 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 438 transitions. Word has length 223 [2022-11-03 02:58:39,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:58:39,629 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 438 transitions. [2022-11-03 02:58:39,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.0375586854460095) internal successors, (221), 212 states have internal predecessors, (221), 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 02:58:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 438 transitions. [2022-11-03 02:58:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-11-03 02:58:39,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:58:39,639 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-03 02:58:39,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:58:39,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:58:39,867 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:58:39,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:58:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1423041202, now seen corresponding path program 8 times [2022-11-03 02:58:39,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:58:39,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231354760] [2022-11-03 02:58:39,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:58:39,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:58:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:59:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 44325 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 22170 trivial. 0 not checked. [2022-11-03 02:59:21,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:59:21,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231354760] [2022-11-03 02:59:21,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231354760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:59:21,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993199925] [2022-11-03 02:59:21,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:59:21,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:59:21,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:59:21,303 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:59:21,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371eaf20-cee4-4d5f-a3b7-2ad0943b48c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:59:22,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:59:22,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:59:22,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:59:22,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:59:22,107 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 18 treesize of output 16 [2022-11-03 02:59:23,002 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 25 treesize of output 25 [2022-11-03 02:59:23,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-03 02:59:23,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-03 02:59:23,535 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 37 treesize of output 39 [2022-11-03 02:59:29,079 INFO L356 Elim1Store]: treesize reduction 14, result has 33.3 percent of original size [2022-11-03 02:59:29,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 26 [2022-11-03 02:59:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 44325 backedges. 828 proven. 21 refuted. 0 times theorem prover too weak. 43476 trivial. 0 not checked. [2022-11-03 02:59:29,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:59:31,903 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:59:31,904 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 9946 treesize of output 9406 [2022-11-03 02:59:32,008 INFO L356 Elim1Store]: treesize reduction 31, result has 11.4 percent of original size [2022-11-03 02:59:32,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 71362 treesize of output 65958