./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mbpr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7 --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 a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:03:14,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:03:14,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:03:14,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:03:14,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:03:14,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:03:14,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:03:14,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:03:14,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:03:14,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:03:14,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:03:14,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:03:14,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:03:14,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:03:14,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:03:14,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:03:14,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:03:14,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:03:14,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:03:14,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:03:14,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:03:14,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:03:14,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:03:14,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:03:14,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:03:14,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:03:14,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:03:14,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:03:14,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:03:14,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:03:14,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:03:14,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:03:14,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:03:14,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:03:14,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:03:14,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:03:14,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:03:14,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:03:14,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:03:14,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:03:14,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:03:14,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:03:15,039 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:03:15,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:03:15,040 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:03:15,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:03:15,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:03:15,041 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:03:15,042 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:03:15,042 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:03:15,042 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:03:15,042 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:03:15,042 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:03:15,043 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:03:15,043 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:03:15,043 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:03:15,043 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:03:15,044 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:03:15,044 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:03:15,044 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:03:15,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:03:15,045 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:03:15,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:03:15,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:03:15,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:03:15,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:03:15,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:03:15,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:03:15,047 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:03:15,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:03:15,047 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:03:15,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:03:15,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:03:15,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:03:15,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:03:15,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:03:15,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:03:15,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:03:15,049 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:03:15,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:03:15,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:03:15,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:03:15,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:03:15,050 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 [2021-11-25 18:03:15,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:03:15,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:03:15,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:03:15,372 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:03:15,373 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:03:15,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-tiling/mbpr3.c [2021-11-25 18:03:15,463 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/data/bb607a63c/ae40ba9da3264a0083843407461fbeaf/FLAGee3783c10 [2021-11-25 18:03:15,938 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:03:15,938 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/sv-benchmarks/c/array-tiling/mbpr3.c [2021-11-25 18:03:15,946 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/data/bb607a63c/ae40ba9da3264a0083843407461fbeaf/FLAGee3783c10 [2021-11-25 18:03:16,335 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/data/bb607a63c/ae40ba9da3264a0083843407461fbeaf [2021-11-25 18:03:16,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:03:16,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:03:16,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:03:16,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:03:16,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:03:16,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:16" (1/1) ... [2021-11-25 18:03:16,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@444731c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16, skipping insertion in model container [2021-11-25 18:03:16,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:16" (1/1) ... [2021-11-25 18:03:16,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:03:16,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:03:16,588 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_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/sv-benchmarks/c/array-tiling/mbpr3.c[396,409] [2021-11-25 18:03:16,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:03:16,659 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:03:16,684 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_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/sv-benchmarks/c/array-tiling/mbpr3.c[396,409] [2021-11-25 18:03:16,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:03:16,739 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:03:16,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16 WrapperNode [2021-11-25 18:03:16,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:03:16,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:03:16,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:03:16,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:03:16,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16" (1/1) ... [2021-11-25 18:03:16,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16" (1/1) ... [2021-11-25 18:03:16,823 INFO L137 Inliner]: procedures = 15, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 107 [2021-11-25 18:03:16,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:03:16,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:03:16,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:03:16,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:03:16,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16" (1/1) ... [2021-11-25 18:03:16,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16" (1/1) ... [2021-11-25 18:03:16,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16" (1/1) ... [2021-11-25 18:03:16,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16" (1/1) ... [2021-11-25 18:03:16,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16" (1/1) ... [2021-11-25 18:03:16,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16" (1/1) ... [2021-11-25 18:03:16,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16" (1/1) ... [2021-11-25 18:03:16,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:03:16,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:03:16,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:03:16,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:03:16,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16" (1/1) ... [2021-11-25 18:03:16,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:03:16,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:16,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:03:16,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:03:16,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:03:16,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:03:16,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:03:16,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:03:16,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:03:16,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:03:16,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:03:16,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:03:17,055 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:03:17,056 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:03:17,344 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:03:17,437 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:03:17,437 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 18:03:17,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:03:17 BoogieIcfgContainer [2021-11-25 18:03:17,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:03:17,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:03:17,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:03:17,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:03:17,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:03:16" (1/3) ... [2021-11-25 18:03:17,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4471ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:03:17, skipping insertion in model container [2021-11-25 18:03:17,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:16" (2/3) ... [2021-11-25 18:03:17,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4471ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:03:17, skipping insertion in model container [2021-11-25 18:03:17,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:03:17" (3/3) ... [2021-11-25 18:03:17,449 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2021-11-25 18:03:17,455 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:03:17,455 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:03:17,532 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:03:17,548 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:03:17,548 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:03:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:03:17,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:17,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:17,603 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:17,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:17,609 INFO L85 PathProgramCache]: Analyzing trace with hash 383781863, now seen corresponding path program 1 times [2021-11-25 18:03:17,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:17,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296890295] [2021-11-25 18:03:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:17,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:18,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:18,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296890295] [2021-11-25 18:03:18,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296890295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:18,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:18,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:03:18,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585648748] [2021-11-25 18:03:18,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:18,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:03:18,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:18,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:03:18,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:03:18,286 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:18,371 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2021-11-25 18:03:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:03:18,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 18:03:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:18,385 INFO L225 Difference]: With dead ends: 28 [2021-11-25 18:03:18,386 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 18:03:18,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:03:18,394 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:18,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:03:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 18:03:18,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-25 18:03:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2021-11-25 18:03:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-11-25 18:03:18,437 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2021-11-25 18:03:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:18,437 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-11-25 18:03:18,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-11-25 18:03:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:03:18,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:18,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:18,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:03:18,442 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:18,446 INFO L85 PathProgramCache]: Analyzing trace with hash 308643540, now seen corresponding path program 1 times [2021-11-25 18:03:18,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:18,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683129412] [2021-11-25 18:03:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:18,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:18,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:18,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683129412] [2021-11-25 18:03:18,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683129412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:18,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:18,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:03:18,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144229758] [2021-11-25 18:03:18,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:18,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:03:18,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:18,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:03:18,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:03:18,780 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:18,831 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-11-25 18:03:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:03:18,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 18:03:18,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:18,834 INFO L225 Difference]: With dead ends: 20 [2021-11-25 18:03:18,834 INFO L226 Difference]: Without dead ends: 14 [2021-11-25 18:03:18,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:03:18,844 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:18,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 7 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:03:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-25 18:03:18,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-25 18:03:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:18,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-25 18:03:18,857 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2021-11-25 18:03:18,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:18,857 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-25 18:03:18,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:18,858 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-25 18:03:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:03:18,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:18,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:18,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:03:18,860 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:18,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1611323004, now seen corresponding path program 1 times [2021-11-25 18:03:18,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:18,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421229274] [2021-11-25 18:03:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:18,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:19,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:19,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421229274] [2021-11-25 18:03:19,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421229274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:19,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920917694] [2021-11-25 18:03:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:19,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:19,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:19,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:19,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:03:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:19,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-25 18:03:19,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:19,893 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-11-25 18:03:19,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:03:19,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:19,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:19,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:19,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:19,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2021-11-25 18:03:20,108 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2021-11-25 18:03:20,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:20,129 INFO L388 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 16 treesize of output 20 [2021-11-25 18:03:20,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:20,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-25 18:03:20,312 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2021-11-25 18:03:20,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:20,327 INFO L388 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 16 treesize of output 20 [2021-11-25 18:03:20,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2021-11-25 18:03:20,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:20,401 INFO L388 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 23 [2021-11-25 18:03:20,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 33 [2021-11-25 18:03:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:20,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:20,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:20,872 INFO L388 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 377 treesize of output 375 [2021-11-25 18:03:21,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:21,639 INFO L388 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 31535 treesize of output 31349 [2021-11-25 18:03:22,037 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-25 18:03:22,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1162656748] [2021-11-25 18:03:22,062 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:03:22,063 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:22,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:22,074 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:22,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:22,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,173 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:03:22,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 18:03:22,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-25 18:03:22,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 75 [2021-11-25 18:03:22,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,302 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 156 [2021-11-25 18:03:22,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:22,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:22,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 24 [2021-11-25 18:03:22,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,531 INFO L354 Elim1Store]: treesize reduction 85, result has 15.0 percent of original size [2021-11-25 18:03:22,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 381 treesize of output 406 [2021-11-25 18:03:22,590 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-25 18:03:22,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 522 treesize of output 509 [2021-11-25 18:03:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2021-11-25 18:03:22,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,726 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-25 18:03:22,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 394 treesize of output 360 [2021-11-25 18:03:22,846 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-25 18:03:22,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 632 treesize of output 611 [2021-11-25 18:03:22,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:22,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 764 treesize of output 756 [2021-11-25 18:03:23,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:23,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:23,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:23,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:23,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:23,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:23,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-25 18:03:23,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 [2021-11-25 18:03:23,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:23,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2021-11-25 18:03:23,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-25 18:03:23,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,354 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-11-25 18:03:23,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 149 [2021-11-25 18:03:23,408 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 319 [2021-11-25 18:03:23,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,472 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-25 18:03:23,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 253 [2021-11-25 18:03:23,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:23,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 223 [2021-11-25 18:03:23,686 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 392 treesize of output 376 [2021-11-25 18:03:23,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,718 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-25 18:03:23,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 361 treesize of output 348 [2021-11-25 18:03:23,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:23,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:23,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:23,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:23,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:23,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:23,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:23,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:23,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:23,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:23,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:24,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 122 [2021-11-25 18:03:24,067 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 152 [2021-11-25 18:03:24,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2021-11-25 18:03:24,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 16 [2021-11-25 18:03:24,118 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 169 [2021-11-25 18:03:24,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 146 [2021-11-25 18:03:24,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:24,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:24,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:24,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:24,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:24,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:24,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:24,355 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:24,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '207#(and (= |ULTIMATE.start_main_~CCCELVOL3~0#1| 7) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite |ULTIMATE.start_main_#t~short17#1| 1 0)) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (< |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_~MINVAL~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_#t~mem16#1| 0)) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem15#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem16#1|))' at error location [2021-11-25 18:03:24,979 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:24,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:03:24,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-25 18:03:24,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078922387] [2021-11-25 18:03:24,980 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:24,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:03:24,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:24,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:03:24,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-11-25 18:03:24,983 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2021-11-25 18:03:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:25,332 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-11-25 18:03:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:03:25,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 12 [2021-11-25 18:03:25,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:25,335 INFO L225 Difference]: With dead ends: 24 [2021-11-25 18:03:25,335 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 18:03:25,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 18:03:25,341 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:25,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 13 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:03:25,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 18:03:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2021-11-25 18:03:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-25 18:03:25,351 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 12 [2021-11-25 18:03:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:25,351 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-25 18:03:25,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2021-11-25 18:03:25,352 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-25 18:03:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:03:25,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:25,353 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:25,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:25,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:25,567 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:25,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:25,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1931181345, now seen corresponding path program 1 times [2021-11-25 18:03:25,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:25,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827387520] [2021-11-25 18:03:25,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:25,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:25,807 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827387520] [2021-11-25 18:03:25,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827387520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528705080] [2021-11-25 18:03:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:25,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:25,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:25,812 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:25,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:03:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:25,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 18:03:25,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:26,021 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-11-25 18:03:26,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-25 18:03:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:26,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:26,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:26,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:26,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-11-25 18:03:26,157 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 18:03:26,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:26,168 INFO L388 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 18 treesize of output 22 [2021-11-25 18:03:26,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:26,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:03:26,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 33 [2021-11-25 18:03:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:26,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:26,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:26,649 INFO L388 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 185 treesize of output 185 [2021-11-25 18:03:27,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:27,031 INFO L388 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 18:03:27,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:27,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2021-11-25 18:03:27,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 134 treesize of output 122 [2021-11-25 18:03:27,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:27,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:27,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:27,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:27,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 18:03:27,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 154 treesize of output 140 [2021-11-25 18:03:27,217 INFO L354 Elim1Store]: treesize reduction 39, result has 20.4 percent of original size [2021-11-25 18:03:27,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 235 treesize of output 227 [2021-11-25 18:03:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:27,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528705080] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:27,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1362398523] [2021-11-25 18:03:27,414 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:03:27,414 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:27,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:27,415 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:27,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:27,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,469 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:03:27,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 18:03:27,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-25 18:03:27,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 75 [2021-11-25 18:03:27,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,554 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 156 [2021-11-25 18:03:27,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:27,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:27,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 24 [2021-11-25 18:03:27,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,733 INFO L354 Elim1Store]: treesize reduction 85, result has 15.0 percent of original size [2021-11-25 18:03:27,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 381 treesize of output 406 [2021-11-25 18:03:27,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,774 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 175 [2021-11-25 18:03:27,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2021-11-25 18:03:27,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 30 [2021-11-25 18:03:27,859 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-25 18:03:27,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 475 treesize of output 456 [2021-11-25 18:03:27,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:27,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 554 treesize of output 546 [2021-11-25 18:03:27,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:28,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:28,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:28,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:28,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:28,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:28,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-25 18:03:28,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 [2021-11-25 18:03:28,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:28,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2021-11-25 18:03:28,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-25 18:03:28,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,269 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-11-25 18:03:28,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 149 [2021-11-25 18:03:28,317 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 319 [2021-11-25 18:03:28,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,340 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-25 18:03:28,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 253 [2021-11-25 18:03:28,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:28,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:28,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 157 [2021-11-25 18:03:28,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:28,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:28,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:28,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:28,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:28,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:28,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:28,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:28,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:28,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:28,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 122 [2021-11-25 18:03:28,748 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 152 [2021-11-25 18:03:28,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2021-11-25 18:03:28,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:28,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 100 treesize of output 73 [2021-11-25 18:03:28,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:28,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:28,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:28,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:28,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:28,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:29,182 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:30,137 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '390#(and (= |ULTIMATE.start_main_~CCCELVOL3~0#1| 7) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:03:30,137 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:30,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:30,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2021-11-25 18:03:30,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230444386] [2021-11-25 18:03:30,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:30,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 18:03:30,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:30,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 18:03:30,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:03:30,140 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:30,692 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-11-25 18:03:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:03:30,693 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:03:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:30,694 INFO L225 Difference]: With dead ends: 24 [2021-11-25 18:03:30,694 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 18:03:30,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=326, Invalid=1396, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 18:03:30,697 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:30,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 18 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 102 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2021-11-25 18:03:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 18:03:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-11-25 18:03:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-25 18:03:30,704 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2021-11-25 18:03:30,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:30,704 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-25 18:03:30,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-25 18:03:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:03:30,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:30,706 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:30,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:30,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:30,919 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:30,919 INFO L85 PathProgramCache]: Analyzing trace with hash 741845092, now seen corresponding path program 2 times [2021-11-25 18:03:30,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:30,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420872153] [2021-11-25 18:03:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:30,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:31,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:31,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420872153] [2021-11-25 18:03:31,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420872153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:31,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134378937] [2021-11-25 18:03:31,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:03:31,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:31,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:31,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:31,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:03:31,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:03:31,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:31,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 18:03:31,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:31,412 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-11-25 18:03:31,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-25 18:03:31,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 36 [2021-11-25 18:03:31,486 INFO L354 Elim1Store]: treesize reduction 168, result has 14.7 percent of original size [2021-11-25 18:03:31,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 62 treesize of output 66 [2021-11-25 18:03:31,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:31,523 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 18:03:31,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 31 [2021-11-25 18:03:31,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 14 [2021-11-25 18:03:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:03:31,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:31,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:31,793 INFO L388 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 18:03:31,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:31,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2021-11-25 18:03:31,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 52 [2021-11-25 18:03:31,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:31,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:31,827 INFO L388 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 7 treesize of output 3 [2021-11-25 18:03:31,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 78 treesize of output 68 [2021-11-25 18:03:31,862 INFO L354 Elim1Store]: treesize reduction 90, result has 10.0 percent of original size [2021-11-25 18:03:31,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 418 treesize of output 343 [2021-11-25 18:03:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:03:31,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134378937] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:31,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455462723] [2021-11-25 18:03:31,989 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:03:31,989 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:31,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:31,989 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:31,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:32,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,043 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:03:32,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 18:03:32,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-25 18:03:32,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 75 [2021-11-25 18:03:32,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,125 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 161 [2021-11-25 18:03:32,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:32,155 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 21 [2021-11-25 18:03:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,318 INFO L354 Elim1Store]: treesize reduction 85, result has 15.0 percent of original size [2021-11-25 18:03:32,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 381 treesize of output 406 [2021-11-25 18:03:32,366 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-25 18:03:32,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 522 treesize of output 509 [2021-11-25 18:03:32,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2021-11-25 18:03:32,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,522 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-25 18:03:32,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 464 treesize of output 404 [2021-11-25 18:03:32,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:32,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:32,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:32,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:32,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:32,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:32,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:32,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:32,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 122 [2021-11-25 18:03:32,784 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 152 [2021-11-25 18:03:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2021-11-25 18:03:32,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 100 treesize of output 73 [2021-11-25 18:03:32,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:32,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:32,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:32,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:32,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:32,968 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:32,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:32,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:33,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 122 [2021-11-25 18:03:33,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:33,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 100 treesize of output 73 [2021-11-25 18:03:33,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 122 [2021-11-25 18:03:33,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 106 [2021-11-25 18:03:33,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:33,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:33,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:33,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:33,481 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:34,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '610#(and (= |ULTIMATE.start_main_~CCCELVOL3~0#1| 7) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:03:34,209 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:34,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:34,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-11-25 18:03:34,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630047929] [2021-11-25 18:03:34,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:34,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 18:03:34,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:34,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 18:03:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-11-25 18:03:34,211 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 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) [2021-11-25 18:03:34,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:34,755 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2021-11-25 18:03:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:03:34,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 18:03:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:34,757 INFO L225 Difference]: With dead ends: 30 [2021-11-25 18:03:34,757 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 18:03:34,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 18:03:34,760 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:34,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 39 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:03:34,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 18:03:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-11-25 18:03:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-25 18:03:34,767 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2021-11-25 18:03:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:34,767 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-25 18:03:34,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 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) [2021-11-25 18:03:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-25 18:03:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 18:03:34,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:34,769 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:34,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:34,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:34,995 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1589243327, now seen corresponding path program 3 times [2021-11-25 18:03:34,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:34,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581110391] [2021-11-25 18:03:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:34,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:03:35,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:35,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581110391] [2021-11-25 18:03:35,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581110391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:35,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978398088] [2021-11-25 18:03:35,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:03:35,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:35,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:35,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:35,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:03:35,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:03:35,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:35,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:03:35,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:03:35,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:03:35,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978398088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:35,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1366059086] [2021-11-25 18:03:35,986 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:03:35,986 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:35,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:35,987 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:35,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,036 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-25 18:03:36,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-25 18:03:36,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,080 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:03:36,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 18:03:36,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2021-11-25 18:03:36,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,149 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 120 [2021-11-25 18:03:36,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-11-25 18:03:36,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:36,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2021-11-25 18:03:36,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:36,321 INFO L354 Elim1Store]: treesize reduction 116, result has 26.1 percent of original size [2021-11-25 18:03:36,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 397 treesize of output 429 [2021-11-25 18:03:36,419 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-25 18:03:36,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 553 treesize of output 538 [2021-11-25 18:03:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,454 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-25 18:03:36,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 549 treesize of output 546 [2021-11-25 18:03:36,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:36,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 24 [2021-11-25 18:03:36,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 21 [2021-11-25 18:03:36,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:36,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 28 [2021-11-25 18:03:36,736 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-25 18:03:36,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 589 treesize of output 450 [2021-11-25 18:03:36,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,773 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-25 18:03:36,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 448 treesize of output 443 [2021-11-25 18:03:36,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:36,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:36,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:36,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:36,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:36,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:36,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:36,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:37,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:37,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:37,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:37,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:37,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:37,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 122 [2021-11-25 18:03:37,146 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 152 [2021-11-25 18:03:37,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2021-11-25 18:03:37,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 16 [2021-11-25 18:03:37,190 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 169 [2021-11-25 18:03:37,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 146 [2021-11-25 18:03:37,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:37,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:37,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:37,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:37,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:37,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:37,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-25 18:03:37,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:37,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 [2021-11-25 18:03:37,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 36 [2021-11-25 18:03:37,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-25 18:03:37,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,438 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-11-25 18:03:37,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 149 [2021-11-25 18:03:37,492 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 319 [2021-11-25 18:03:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,514 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-25 18:03:37,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 253 [2021-11-25 18:03:37,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 19 [2021-11-25 18:03:37,621 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 261 [2021-11-25 18:03:37,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,642 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-25 18:03:37,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 241 [2021-11-25 18:03:37,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:37,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:37,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:37,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:37,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:37,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:37,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:37,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:38,048 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:38,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '865#(and (= |ULTIMATE.start_main_~CCCELVOL3~0#1| 7) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:03:38,906 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:38,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:38,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2021-11-25 18:03:38,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426844461] [2021-11-25 18:03:38,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:38,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 18:03:38,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:38,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 18:03:38,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:03:38,909 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) [2021-11-25 18:03:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:39,225 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-25 18:03:39,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:03:39,229 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) Word has length 21 [2021-11-25 18:03:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:39,229 INFO L225 Difference]: With dead ends: 53 [2021-11-25 18:03:39,229 INFO L226 Difference]: Without dead ends: 23 [2021-11-25 18:03:39,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 18:03:39,231 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:39,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 48 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:03:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-25 18:03:39,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-25 18:03:39,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2021-11-25 18:03:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-25 18:03:39,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2021-11-25 18:03:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:39,242 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-25 18:03:39,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) [2021-11-25 18:03:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-25 18:03:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 18:03:39,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:39,246 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:39,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:39,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:03:39,460 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:39,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1112436306, now seen corresponding path program 4 times [2021-11-25 18:03:39,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:39,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347793463] [2021-11-25 18:03:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:39,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:03:39,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:39,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347793463] [2021-11-25 18:03:39,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347793463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:39,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456705259] [2021-11-25 18:03:39,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:03:39,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:39,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:39,576 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:39,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:03:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:39,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:03:39,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:03:39,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:03:40,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456705259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:40,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1301753153] [2021-11-25 18:03:40,038 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:03:40,039 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:40,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:40,039 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:40,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:40,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,092 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:03:40,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 18:03:40,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-25 18:03:40,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2021-11-25 18:03:40,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,190 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 120 [2021-11-25 18:03:40,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-11-25 18:03:40,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2021-11-25 18:03:40,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,237 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 98 [2021-11-25 18:03:40,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-11-25 18:03:40,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:40,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:40,400 INFO L354 Elim1Store]: treesize reduction 116, result has 26.1 percent of original size [2021-11-25 18:03:40,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 397 treesize of output 429 [2021-11-25 18:03:40,557 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-25 18:03:40,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 889 treesize of output 878 [2021-11-25 18:03:40,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,596 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-25 18:03:40,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 1002 treesize of output 999 [2021-11-25 18:03:40,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:40,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 28 [2021-11-25 18:03:40,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:40,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 18 [2021-11-25 18:03:40,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:40,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:40,997 INFO L354 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2021-11-25 18:03:40,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 657 treesize of output 570 [2021-11-25 18:03:41,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,029 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-25 18:03:41,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 574 treesize of output 571 [2021-11-25 18:03:41,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:41,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:41,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:41,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:41,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:41,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:41,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:41,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:41,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-25 18:03:41,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 [2021-11-25 18:03:41,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:41,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2021-11-25 18:03:41,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-25 18:03:41,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:41,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:41,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:41,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:41,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:41,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-25 18:03:41,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:41,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 [2021-11-25 18:03:41,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 36 [2021-11-25 18:03:41,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-25 18:03:41,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,645 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-11-25 18:03:41,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 149 [2021-11-25 18:03:41,692 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 319 [2021-11-25 18:03:41,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,715 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-25 18:03:41,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 253 [2021-11-25 18:03:41,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:41,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 19 [2021-11-25 18:03:41,843 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 262 [2021-11-25 18:03:41,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,864 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-25 18:03:41,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 247 treesize of output 242 [2021-11-25 18:03:41,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:41,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:41,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:41,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:03:42,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 3 [2021-11-25 18:03:42,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:42,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 61 [2021-11-25 18:03:42,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:42,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:42,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:42,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-11-25 18:03:42,431 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:43,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1134#(and (= |ULTIMATE.start_main_~CCCELVOL3~0#1| 7) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:03:43,009 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:43,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:43,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-25 18:03:43,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899025501] [2021-11-25 18:03:43,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:43,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:03:43,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:43,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:03:43,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:03:43,011 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:43,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:43,141 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-11-25 18:03:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:03:43,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 18:03:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:43,143 INFO L225 Difference]: With dead ends: 40 [2021-11-25 18:03:43,143 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 18:03:43,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:03:43,144 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:43,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 15 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:03:43,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 18:03:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-25 18:03:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-25 18:03:43,152 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2021-11-25 18:03:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:43,152 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-25 18:03:43,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-25 18:03:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:03:43,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:43,154 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:43,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:43,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:43,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:43,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1570634082, now seen corresponding path program 5 times [2021-11-25 18:03:43,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:43,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524650289] [2021-11-25 18:03:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:43,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:44,029 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:44,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524650289] [2021-11-25 18:03:44,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524650289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:44,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822679162] [2021-11-25 18:03:44,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:03:44,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:44,038 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:44,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e6d70c-ccf0-46ec-93a7-7bae759d74e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:03:44,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 18:03:44,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:44,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-25 18:03:44,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:44,596 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-11-25 18:03:44,597 INFO L388 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 2 case distinctions, treesize of input 23 treesize of output 28 [2021-11-25 18:03:44,705 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 18:03:44,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:44,713 INFO L388 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 21 treesize of output 25 [2021-11-25 18:03:44,756 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-11-25 18:03:44,756 INFO L388 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 2 case distinctions, treesize of input 34 treesize of output 37 [2021-11-25 18:03:44,809 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 18:03:44,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:44,820 INFO L388 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 18 treesize of output 22 [2021-11-25 18:03:44,848 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:03:44,849 INFO L388 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 2 case distinctions, treesize of input 34 treesize of output 22 [2021-11-25 18:03:44,938 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 18:03:44,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:44,945 INFO L388 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 21 treesize of output 25 [2021-11-25 18:03:44,986 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-11-25 18:03:44,986 INFO L388 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 2 case distinctions, treesize of input 34 treesize of output 37 [2021-11-25 18:03:45,043 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 18:03:45,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:45,051 INFO L388 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 18 treesize of output 22 [2021-11-25 18:03:45,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:03:45,104 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:03:45,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 51 treesize of output 46 [2021-11-25 18:03:45,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 51 treesize of output 33 [2021-11-25 18:03:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:45,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:45,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:45,896 INFO L388 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 217 treesize of output 217 [2021-11-25 18:03:46,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:03:46,858 INFO L388 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 3151739 treesize of output 3140490 [2021-11-25 18:03:57,470 WARN L227 SmtUtils]: Spent 10.61s on a formula simplification that was a NOOP. DAG size: 2369 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 18:05:00,212 WARN L227 SmtUtils]: Spent 51.93s on a formula simplification. DAG size of input: 2368 DAG size of output: 2365 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 18:05:02,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:05:02,949 INFO L388 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 27793931734 treesize of output 27689074148