./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/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_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/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_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/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 08a64b64599ceefef00723a17bd9cad66dbb7d4e6f08f1e5c61a19e368f8af19 --- 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 02:48:23,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:48:23,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:48:23,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:48:23,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:48:23,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:48:23,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:48:23,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:48:23,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:48:23,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:48:23,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:48:23,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:48:23,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:48:23,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:48:23,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:48:23,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:48:23,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:48:23,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:48:23,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:48:23,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:48:23,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:48:23,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:48:23,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:48:23,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:48:23,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:48:23,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:48:23,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:48:23,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:48:23,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:48:23,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:48:23,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:48:23,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:48:23,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:48:23,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:48:23,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:48:23,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:48:23,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:48:23,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:48:23,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:48:23,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:48:23,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:48:23,964 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:48:24,000 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:48:24,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:48:24,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:48:24,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:48:24,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:48:24,002 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:48:24,002 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:48:24,002 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:48:24,003 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:48:24,003 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:48:24,004 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:48:24,004 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:48:24,004 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:48:24,005 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:48:24,005 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:48:24,005 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:48:24,005 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:48:24,005 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:48:24,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:48:24,006 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:48:24,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:48:24,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:48:24,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:48:24,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:48:24,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:48:24,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:48:24,009 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:48:24,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:48:24,010 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:48:24,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:48:24,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:48:24,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:48:24,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:48:24,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:48:24,011 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:48:24,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:48:24,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:48:24,012 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:48:24,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:48:24,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:48:24,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:48:24,012 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_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08a64b64599ceefef00723a17bd9cad66dbb7d4e6f08f1e5c61a19e368f8af19 [2022-11-03 02:48:24,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:48:24,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:48:24,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:48:24,356 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:48:24,357 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:48:24,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i [2022-11-03 02:48:24,429 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/data/edd8aab49/e972cbc6548a41a78fd77b5dd4966d39/FLAG864aaad88 [2022-11-03 02:48:24,907 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:48:24,907 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i [2022-11-03 02:48:24,913 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/data/edd8aab49/e972cbc6548a41a78fd77b5dd4966d39/FLAG864aaad88 [2022-11-03 02:48:25,259 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/data/edd8aab49/e972cbc6548a41a78fd77b5dd4966d39 [2022-11-03 02:48:25,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:48:25,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:48:25,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:48:25,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:48:25,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:48:25,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@616b7596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25, skipping insertion in model container [2022-11-03 02:48:25,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:48:25,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:48:25,462 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_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i[998,1011] [2022-11-03 02:48:25,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:48:25,511 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:48:25,534 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_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i[998,1011] [2022-11-03 02:48:25,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:48:25,579 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:48:25,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25 WrapperNode [2022-11-03 02:48:25,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:48:25,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:48:25,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:48:25,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:48:25,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,617 INFO L138 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2022-11-03 02:48:25,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:48:25,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:48:25,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:48:25,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:48:25,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,642 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:48:25,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:48:25,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:48:25,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:48:25,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25" (1/1) ... [2022-11-03 02:48:25,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:48:25,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:25,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:48:25,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:48:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:48:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:48:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:48:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:48:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:48:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:48:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:48:25,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:48:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:48:25,793 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:48:25,795 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:48:26,048 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:48:26,184 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:48:26,184 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:48:26,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:48:26 BoogieIcfgContainer [2022-11-03 02:48:26,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:48:26,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:48:26,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:48:26,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:48:26,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:48:25" (1/3) ... [2022-11-03 02:48:26,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0291d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:48:26, skipping insertion in model container [2022-11-03 02:48:26,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:25" (2/3) ... [2022-11-03 02:48:26,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0291d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:48:26, skipping insertion in model container [2022-11-03 02:48:26,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:48:26" (3/3) ... [2022-11-03 02:48:26,198 INFO L112 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-1.i [2022-11-03 02:48:26,218 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:48:26,218 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:48:26,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:48:26,286 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;@426fda43, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:48:26,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:48:26,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 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 02:48:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:48:26,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:26,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 02:48:26,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:26,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:26,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1179253618, now seen corresponding path program 1 times [2022-11-03 02:48:26,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:48:26,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255929136] [2022-11-03 02:48:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:26,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:48:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:26,579 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 02:48:26,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:26,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255929136] [2022-11-03 02:48:26,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255929136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:26,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:48:26,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:48:26,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366470693] [2022-11-03 02:48:26,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:26,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:48:26,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:48:26,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:48:26,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:48:26,620 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 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) 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 02:48:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:26,749 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2022-11-03 02:48:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:48:26,752 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 02:48:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:26,761 INFO L225 Difference]: With dead ends: 26 [2022-11-03 02:48:26,762 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 02:48:26,765 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 02:48:26,769 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:26,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:48:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 02:48:26,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2022-11-03 02:48:26,803 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 02:48:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-03 02:48:26,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-03 02:48:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:26,806 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-03 02:48:26,806 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 02:48:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-03 02:48:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:48:26,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:26,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:26,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:48:26,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:26,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2051210360, now seen corresponding path program 1 times [2022-11-03 02:48:26,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:48:26,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375142795] [2022-11-03 02:48:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:26,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:48:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:27,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:27,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375142795] [2022-11-03 02:48:27,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375142795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:27,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105855771] [2022-11-03 02:48:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:27,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:27,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:27,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:27,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:48:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:27,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:48:27,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:27,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:27,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105855771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:27,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1148894904] [2022-11-03 02:48:27,229 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:48:27,230 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:48:27,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:48:27,239 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:48:27,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:48:27,307 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 7 treesize of output 6 [2022-11-03 02:48:27,319 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 7 treesize of output 6 [2022-11-03 02:48:27,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:27,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:27,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:27,817 INFO L356 Elim1Store]: treesize reduction 72, result has 6.5 percent of original size [2022-11-03 02:48:27,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 289 treesize of output 317 [2022-11-03 02:48:27,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:27,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:27,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:27,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:27,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:27,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:27,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-11-03 02:48:28,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:28,365 INFO L356 Elim1Store]: treesize reduction 258, result has 9.2 percent of original size [2022-11-03 02:48:28,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 443 treesize of output 475 [2022-11-03 02:48:28,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:28,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:28,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:28,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:28,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-03 02:48:29,768 INFO L356 Elim1Store]: treesize reduction 578, result has 9.7 percent of original size [2022-11-03 02:48:29,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 678 treesize of output 767 [2022-11-03 02:48:30,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:30,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 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 132 treesize of output 297 [2022-11-03 02:48:30,310 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 9 treesize of output 7 [2022-11-03 02:48:30,322 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 9 treesize of output 7 [2022-11-03 02:48:30,337 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 9 treesize of output 5 [2022-11-03 02:48:30,350 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 13 treesize of output 9 [2022-11-03 02:48:30,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:30,789 INFO L356 Elim1Store]: treesize reduction 262, result has 9.7 percent of original size [2022-11-03 02:48:30,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 7 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 888 treesize of output 1795 [2022-11-03 02:48:30,920 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 737 treesize of output 721 [2022-11-03 02:48:31,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:31,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:48:33,875 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 9 treesize of output 7 [2022-11-03 02:48:42,843 WARN L234 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 37 DAG size of output: 11 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:48:42,844 INFO L356 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2022-11-03 02:48:42,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 28393 treesize of output 28414 [2022-11-03 02:49:13,882 WARN L234 SmtUtils]: Spent 17.60s on a formula simplification. DAG size of input: 74 DAG size of output: 40 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:49:13,882 INFO L356 Elim1Store]: treesize reduction 155, result has 28.9 percent of original size [2022-11-03 02:49:13,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 10 new quantified variables, introduced 17 case distinctions, treesize of input 28046 treesize of output 28736 [2022-11-03 02:49:37,562 WARN L234 SmtUtils]: Spent 20.12s on a formula simplification. DAG size of input: 31 DAG size of output: 9 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:49:37,563 INFO L356 Elim1Store]: treesize reduction 69, result has 11.5 percent of original size [2022-11-03 02:49:37,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 5 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 27985 treesize of output 28326 [2022-11-03 02:49:43,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:43,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:43,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:43,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:43,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:43,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:43,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:43,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:43,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:43,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:43,818 INFO L244 Elim1Store]: Index analysis took 249 ms [2022-11-03 02:49:43,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 7 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 1214 [2022-11-03 02:50:30,350 WARN L234 SmtUtils]: Spent 38.38s on a formula simplification. DAG size of input: 38 DAG size of output: 11 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:50:30,350 INFO L356 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2022-11-03 02:50:30,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 116842 treesize of output 116863 [2022-11-03 02:52:57,987 WARN L234 SmtUtils]: Spent 2.05m on a formula simplification. DAG size of input: 75 DAG size of output: 41 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:52:57,988 INFO L356 Elim1Store]: treesize reduction 155, result has 28.9 percent of original size [2022-11-03 02:52:57,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 10 new quantified variables, introduced 17 case distinctions, treesize of input 116428 treesize of output 117143 [2022-11-03 02:53:21,839 WARN L234 SmtUtils]: Spent 20.22s on a formula simplification. DAG size of input: 33 DAG size of output: 9 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:53:21,840 INFO L356 Elim1Store]: treesize reduction 69, result has 11.5 percent of original size [2022-11-03 02:53:21,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 5 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 116367 treesize of output 116705 [2022-11-03 02:53:31,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:31,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:31,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:31,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:31,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 409 [2022-11-03 02:53:32,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:53:37,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:37,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:53:37,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:37,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:37,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:37,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:37,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:37,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:37,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:37,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 11 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 1412 treesize of output 4706 [2022-11-03 02:53:38,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:38,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:38,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:53:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:38,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:38,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:38,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:38,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:38,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:38,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:38,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 11 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 1419 treesize of output 4711 [2022-11-03 02:53:43,861 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 19 treesize of output 1 [2022-11-03 02:53:43,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:53:43,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 [2022-11-03 02:53:43,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:53:43,887 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 13 treesize of output 9 [2022-11-03 02:53:43,951 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:53:44,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '103#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~s1~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|))) (or (not (= |ULTIMATE.start_main_~s1~0#1.offset| 0)) (not (= |ULTIMATE.start_main_~s1~0#1.base| 0))) (= |ULTIMATE.start_main_~s1~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|))) (= (select |#length| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|))) 8) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~s1~0#1.base|) (+ |ULTIMATE.start_main_~s1~0#1.offset| 4)) 0) (not (= (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|))) 1) (= (select (select |#memory_$Pointer$.offset| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (or (not (= |ULTIMATE.start_main_#t~mem11#1.base| 0)) (not (= |ULTIMATE.start_main_#t~mem11#1.offset| 0))) 1 0)) (< (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1.base|))' at error location [2022-11-03 02:53:44,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:53:44,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:53:44,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 02:53:44,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293049780] [2022-11-03 02:53:44,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:44,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:53:44,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:53:44,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=57, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:53:44,208 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 02:53:44,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:44,420 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-11-03 02:53:44,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:53:44,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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) Word has length 7 [2022-11-03 02:53:44,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:44,421 INFO L225 Difference]: With dead ends: 42 [2022-11-03 02:53:44,421 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 02:53:44,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=57, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:53:44,423 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:44,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 24 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:44,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 02:53:44,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 13. [2022-11-03 02:53:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-03 02:53:44,428 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-11-03 02:53:44,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:44,429 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-03 02:53:44,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 02:53:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-03 02:53:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:53:44,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:44,430 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:44,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:53:44,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 02:53:44,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:44,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:44,654 INFO L85 PathProgramCache]: Analyzing trace with hash 50000654, now seen corresponding path program 2 times [2022-11-03 02:53:44,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:44,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696260630] [2022-11-03 02:53:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:45,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696260630] [2022-11-03 02:53:45,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696260630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756517186] [2022-11-03 02:53:45,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:53:45,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:45,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:45,092 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:45,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:53:45,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:53:45,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:45,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:53:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:45,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:45,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756517186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:45,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867091990] [2022-11-03 02:53:45,878 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:53:45,878 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:53:45,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:53:45,879 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:53:45,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:53:45,893 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 7 treesize of output 6 [2022-11-03 02:53:45,902 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 7 treesize of output 6 [2022-11-03 02:53:46,479 INFO L356 Elim1Store]: treesize reduction 242, result has 14.8 percent of original size [2022-11-03 02:53:46,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 547 treesize of output 600 [2022-11-03 02:53:46,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:53:46,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:46,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:46,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 35 [2022-11-03 02:53:46,773 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-03 02:53:46,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 406 treesize of output 414 [2022-11-03 02:53:46,847 INFO L356 Elim1Store]: treesize reduction 43, result has 10.4 percent of original size [2022-11-03 02:53:46,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 395 treesize of output 396 [2022-11-03 02:53:46,940 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 43 treesize of output 26 [2022-11-03 02:53:46,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:46,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2022-11-03 02:53:47,152 INFO L356 Elim1Store]: treesize reduction 226, result has 7.8 percent of original size [2022-11-03 02:53:47,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 486 treesize of output 496 [2022-11-03 02:53:47,223 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 54 treesize of output 35 [2022-11-03 02:53:47,235 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 19 treesize of output 12 [2022-11-03 02:53:47,392 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-03 02:53:47,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 490 treesize of output 498 [2022-11-03 02:53:47,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:47,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-03 02:53:47,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:47,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2022-11-03 02:53:47,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:53:47,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-11-03 02:53:47,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:53:47,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:53:47,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:53:47,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:53:47,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:53:47,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:53:47,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:53:47,928 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 02:53:47,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 164 [2022-11-03 02:53:48,263 INFO L356 Elim1Store]: treesize reduction 161, result has 41.0 percent of original size [2022-11-03 02:53:48,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 357 treesize of output 452 [2022-11-03 02:53:48,329 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 02:53:48,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 173 [2022-11-03 02:53:48,415 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:53:48,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 68 treesize of output 70 [2022-11-03 02:53:48,461 INFO L356 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2022-11-03 02:53:48,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 73 [2022-11-03 02:53:48,534 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:53:48,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 64 treesize of output 66 [2022-11-03 02:53:48,588 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:53:48,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 69 [2022-11-03 02:53:48,772 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-03 02:53:48,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 77 [2022-11-03 02:53:48,792 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 19 treesize of output 12 [2022-11-03 02:53:48,824 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:53:48,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 49 [2022-11-03 02:53:48,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:48,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:48,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2022-11-03 02:53:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:48,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 16 [2022-11-03 02:53:48,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:48,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2022-11-03 02:53:48,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:48,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 16 [2022-11-03 02:53:49,195 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 19 treesize of output 1 [2022-11-03 02:53:49,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:53:49,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 [2022-11-03 02:53:49,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:53:49,224 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 13 treesize of output 9 [2022-11-03 02:53:49,273 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:53:49,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '246#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~s1~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|))) (or (not (= |ULTIMATE.start_main_~s1~0#1.offset| 0)) (not (= |ULTIMATE.start_main_~s1~0#1.base| 0))) (= |ULTIMATE.start_main_~s1~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|))) (= (select |#length| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|))) 8) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~s1~0#1.base|) (+ |ULTIMATE.start_main_~s1~0#1.offset| 4)) 0) (not (= (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|))) 1) (= (select (select |#memory_$Pointer$.offset| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 0) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (or (not (= |ULTIMATE.start_main_#t~mem11#1.base| 0)) (not (= |ULTIMATE.start_main_#t~mem11#1.offset| 0))) 1 0)) (< (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) |#StackHeapBarrier|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1.base|))' at error location [2022-11-03 02:53:49,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:53:49,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:53:49,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-03 02:53:49,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491948915] [2022-11-03 02:53:49,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:49,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:53:49,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:49,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:53:49,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=166, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:53:49,804 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 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 02:53:50,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:50,419 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-11-03 02:53:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:53:50,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 02:53:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:50,421 INFO L225 Difference]: With dead ends: 90 [2022-11-03 02:53:50,421 INFO L226 Difference]: Without dead ends: 83 [2022-11-03 02:53:50,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=166, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:53:50,422 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 105 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:50,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 60 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:53:50,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-03 02:53:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 19. [2022-11-03 02:53:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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 02:53:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-03 02:53:50,429 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2022-11-03 02:53:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:50,429 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-03 02:53:50,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 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 02:53:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-03 02:53:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:53:50,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:50,431 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:50,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:50,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:50,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash 181485774, now seen corresponding path program 3 times [2022-11-03 02:53:50,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:50,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256971861] [2022-11-03 02:53:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:51,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:51,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256971861] [2022-11-03 02:53:51,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256971861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:51,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001013912] [2022-11-03 02:53:51,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:53:51,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:51,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:51,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:51,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:53:51,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:53:51,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:51,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:53:51,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:51,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:52,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001013912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:52,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97645842] [2022-11-03 02:53:52,347 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:53:52,348 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:53:52,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:53:52,348 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:53:52,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:53:52,363 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 7 treesize of output 6 [2022-11-03 02:53:52,370 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 7 treesize of output 6 [2022-11-03 02:53:52,962 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 02:53:52,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 02:53:52,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:53:53,007 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:53:53,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 35 [2022-11-03 02:53:53,355 INFO L356 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2022-11-03 02:53:53,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 519 treesize of output 540 [2022-11-03 02:53:54,809 INFO L356 Elim1Store]: treesize reduction 138, result has 30.7 percent of original size [2022-11-03 02:53:54,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 7 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 690 treesize of output 1198 [2022-11-03 02:53:55,608 INFO L356 Elim1Store]: treesize reduction 69, result has 11.5 percent of original size [2022-11-03 02:53:55,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 5 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 609 treesize of output 936 [2022-11-03 02:53:55,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:53:55,877 WARN L220 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:53:57,322 INFO L356 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2022-11-03 02:53:57,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 15522 treesize of output 15530 [2022-11-03 02:53:58,015 INFO L356 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-03 02:53:58,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 15516 treesize of output 15522 [2022-11-03 02:53:58,371 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 43 treesize of output 21 [2022-11-03 02:53:59,733 INFO L356 Elim1Store]: treesize reduction 196, result has 8.8 percent of original size [2022-11-03 02:53:59,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 15554 treesize of output 15559 [2022-11-03 02:53:59,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2022-11-03 02:53:59,877 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 9 treesize of output 5 [2022-11-03 02:53:59,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-03 02:54:00,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:54:00,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:54:00,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-11-03 02:54:00,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:54:00,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:54:00,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:54:00,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:54:00,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:54:00,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:54:00,509 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 02:54:00,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 164 [2022-11-03 02:54:00,773 INFO L356 Elim1Store]: treesize reduction 161, result has 41.0 percent of original size [2022-11-03 02:54:00,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 357 treesize of output 452 [2022-11-03 02:54:00,842 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 02:54:00,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 173 [2022-11-03 02:54:00,926 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:54:00,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 64 treesize of output 66 [2022-11-03 02:54:00,965 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:54:00,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 69 [2022-11-03 02:54:01,026 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:54:01,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 68 treesize of output 70 [2022-11-03 02:54:01,069 INFO L356 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2022-11-03 02:54:01,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 73 [2022-11-03 02:54:01,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:01,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:01,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 48 [2022-11-03 02:54:01,366 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 19 treesize of output 12 [2022-11-03 02:54:01,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:01,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:01,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 116 [2022-11-03 02:54:01,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:01,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 73 [2022-11-03 02:54:01,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:01,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:01,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 48 [2022-11-03 02:54:01,468 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 19 treesize of output 12 [2022-11-03 02:54:01,564 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-03 02:54:01,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 83 [2022-11-03 02:54:01,586 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 19 treesize of output 12 [2022-11-03 02:54:01,623 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:54:01,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2022-11-03 02:54:01,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:01,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:01,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 111 [2022-11-03 02:54:01,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:01,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 36 [2022-11-03 02:54:01,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:01,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 22 [2022-11-03 02:54:02,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:54:02,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:54:02,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 [2022-11-03 02:54:02,090 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 13 treesize of output 9 [2022-11-03 02:54:02,100 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 19 treesize of output 1 [2022-11-03 02:54:02,144 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:54:02,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '510#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~s1~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|))) (or (not (= |ULTIMATE.start_main_~s1~0#1.offset| 0)) (not (= |ULTIMATE.start_main_~s1~0#1.base| 0))) (= |ULTIMATE.start_main_~s1~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|))) (= (select |#length| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|))) 8) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~s1~0#1.base|) (+ |ULTIMATE.start_main_~s1~0#1.offset| 4)) 0) (not (= (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|))) 1) (= (select (select |#memory_$Pointer$.offset| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 0) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (or (not (= |ULTIMATE.start_main_#t~mem11#1.base| 0)) (not (= |ULTIMATE.start_main_#t~mem11#1.offset| 0))) 1 0)) (< (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) |#StackHeapBarrier|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1.base|))' at error location [2022-11-03 02:54:02,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:54:02,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:54:02,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-03 02:54:02,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13872974] [2022-11-03 02:54:02,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:02,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:54:02,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:02,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:54:02,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=460, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:54:02,666 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 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 02:54:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:03,840 INFO L93 Difference]: Finished difference Result 186 states and 222 transitions. [2022-11-03 02:54:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:54:03,841 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 02:54:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:03,842 INFO L225 Difference]: With dead ends: 186 [2022-11-03 02:54:03,843 INFO L226 Difference]: Without dead ends: 179 [2022-11-03 02:54:03,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=410, Invalid=460, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:54:03,845 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 308 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:03,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 138 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:54:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-03 02:54:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 31. [2022-11-03 02:54:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-11-03 02:54:03,854 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 16 [2022-11-03 02:54:03,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:03,854 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-11-03 02:54:03,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 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 02:54:03,855 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-11-03 02:54:03,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:54:03,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:03,856 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:03,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:04,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:04,083 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2001343410, now seen corresponding path program 4 times [2022-11-03 02:54:04,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:54:04,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659597866] [2022-11-03 02:54:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:04,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:54:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:06,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:54:06,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659597866] [2022-11-03 02:54:06,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659597866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:54:06,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888026578] [2022-11-03 02:54:06,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:54:06,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:06,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:54:06,405 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:54:06,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:54:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:06,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1179 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:54:06,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:07,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:08,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888026578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:08,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2014053218] [2022-11-03 02:54:08,340 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:54:08,340 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:54:08,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:54:08,341 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:54:08,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:54:08,353 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 7 treesize of output 6 [2022-11-03 02:54:08,359 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 7 treesize of output 6 [2022-11-03 02:54:08,759 INFO L356 Elim1Store]: treesize reduction 242, result has 14.8 percent of original size [2022-11-03 02:54:08,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 547 treesize of output 600 [2022-11-03 02:54:08,836 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:54:08,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:08,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:08,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 35 [2022-11-03 02:54:08,987 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-03 02:54:08,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 406 treesize of output 414 [2022-11-03 02:54:09,029 INFO L356 Elim1Store]: treesize reduction 43, result has 10.4 percent of original size [2022-11-03 02:54:09,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 395 treesize of output 396 [2022-11-03 02:54:09,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 26 [2022-11-03 02:54:09,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:09,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2022-11-03 02:54:09,220 INFO L356 Elim1Store]: treesize reduction 226, result has 7.8 percent of original size [2022-11-03 02:54:09,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 441 treesize of output 451 [2022-11-03 02:54:09,286 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 54 treesize of output 35 [2022-11-03 02:54:09,298 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 19 treesize of output 12 [2022-11-03 02:54:09,384 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-03 02:54:09,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 445 treesize of output 453 [2022-11-03 02:54:09,437 INFO L356 Elim1Store]: treesize reduction 43, result has 10.4 percent of original size [2022-11-03 02:54:09,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 449 treesize of output 448 [2022-11-03 02:54:09,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 26 [2022-11-03 02:54:09,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:09,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2022-11-03 02:54:09,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-03 02:54:09,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-11-03 02:54:09,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:54:09,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:54:09,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:54:09,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:54:09,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:54:09,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:54:09,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:54:09,903 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 02:54:09,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 164 [2022-11-03 02:54:10,168 INFO L356 Elim1Store]: treesize reduction 161, result has 41.0 percent of original size [2022-11-03 02:54:10,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 357 treesize of output 447 [2022-11-03 02:54:10,221 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 02:54:10,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 173 [2022-11-03 02:54:10,292 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:54:10,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 68 treesize of output 70 [2022-11-03 02:54:10,333 INFO L356 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2022-11-03 02:54:10,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 73 [2022-11-03 02:54:10,402 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:54:10,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 64 treesize of output 66 [2022-11-03 02:54:10,448 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 02:54:10,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 69 [2022-11-03 02:54:10,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:10,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:10,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 433 treesize of output 424 [2022-11-03 02:54:10,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:54:10,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 391 treesize of output 376 [2022-11-03 02:54:10,738 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-03 02:54:10,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 88 [2022-11-03 02:54:10,756 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 19 treesize of output 12 [2022-11-03 02:54:10,799 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:54:10,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2022-11-03 02:54:10,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:54:10,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 80 [2022-11-03 02:54:10,854 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 13 treesize of output 9 [2022-11-03 02:54:10,867 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 19 treesize of output 12 [2022-11-03 02:54:10,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:54:11,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:54:11,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 [2022-11-03 02:54:11,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:54:11,314 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 19 treesize of output 1 [2022-11-03 02:54:11,321 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 13 treesize of output 9 [2022-11-03 02:54:11,360 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:54:11,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1014#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~s1~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|))) (or (not (= |ULTIMATE.start_main_~s1~0#1.offset| 0)) (not (= |ULTIMATE.start_main_~s1~0#1.base| 0))) (= |ULTIMATE.start_main_~s1~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|))) (= (select |#length| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|))) 8) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~s1~0#1.base|) (+ |ULTIMATE.start_main_~s1~0#1.offset| 4)) 0) (not (= (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|))) 1) (= (select (select |#memory_$Pointer$.offset| |~#a~0.base|) (+ 12 |~#a~0.offset|)) 0) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (or (not (= |ULTIMATE.start_main_#t~mem11#1.base| 0)) (not (= |ULTIMATE.start_main_#t~mem11#1.offset| 0))) 1 0)) (< (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ 12 |~#a~0.offset|)) |#StackHeapBarrier|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s1~0#1.base|) |ULTIMATE.start_main_~s1~0#1.offset|) |ULTIMATE.start_main_#t~mem11#1.base|))' at error location [2022-11-03 02:54:11,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:54:11,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:54:11,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-03 02:54:11,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994033389] [2022-11-03 02:54:11,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:11,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 02:54:11,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:11,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 02:54:11,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1480, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 02:54:11,792 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:13,635 INFO L93 Difference]: Finished difference Result 378 states and 450 transitions. [2022-11-03 02:54:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 02:54:13,636 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-03 02:54:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:13,638 INFO L225 Difference]: With dead ends: 378 [2022-11-03 02:54:13,638 INFO L226 Difference]: Without dead ends: 371 [2022-11-03 02:54:13,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1382, Invalid=1480, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 02:54:13,641 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1001 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:13,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 276 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:54:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-03 02:54:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 55. [2022-11-03 02:54:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 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 02:54:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-11-03 02:54:13,654 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 28 [2022-11-03 02:54:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:13,655 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-11-03 02:54:13,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:54:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-11-03 02:54:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:54:13,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:13,657 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:13,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:54:13,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:13,883 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:13,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2064678066, now seen corresponding path program 5 times [2022-11-03 02:54:13,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:54:13,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4484486] [2022-11-03 02:54:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:13,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:54:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:54:20,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:54:20,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4484486] [2022-11-03 02:54:20,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4484486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:54:20,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532619480] [2022-11-03 02:54:20,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:54:20,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:20,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:54:20,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:54:20,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e397ed-a7b6-495e-88e1-b8c04ecfbebf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process