./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta --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 004e76a55ea43180d22836854efb5ff40e4c49966cf8226e42027e9f69007914 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:42:24,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:42:24,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:42:24,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:42:24,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:42:24,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:42:24,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:42:24,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:42:24,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:42:24,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:42:24,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:42:24,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:42:24,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:42:24,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:42:24,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:42:24,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:42:24,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:42:24,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:42:24,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:42:24,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:42:24,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:42:24,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:42:24,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:42:24,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:42:24,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:42:24,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:42:24,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:42:24,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:42:24,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:42:24,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:42:24,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:42:24,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:42:24,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:42:24,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:42:24,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:42:24,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:42:24,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:42:24,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:42:24,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:42:24,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:42:24,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:42:24,862 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:42:24,891 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:42:24,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:42:24,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:42:24,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:42:24,893 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:42:24,893 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:42:24,893 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:42:24,893 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:42:24,893 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:42:24,893 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:42:24,894 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:42:24,894 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:42:24,894 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:42:24,898 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:42:24,899 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:42:24,899 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:42:24,899 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:42:24,900 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:42:24,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:42:24,901 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:42:24,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:42:24,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:42:24,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:42:24,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:42:24,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:42:24,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:42:24,902 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:42:24,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:42:24,903 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:42:24,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:42:24,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:42:24,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:42:24,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:24,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:42:24,905 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:42:24,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:42:24,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:42:24,906 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:42:24,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:42:24,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:42:24,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:42:24,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 004e76a55ea43180d22836854efb5ff40e4c49966cf8226e42027e9f69007914 [2022-10-17 17:42:25,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:42:25,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:42:25,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:42:25,220 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:42:25,221 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:42:25,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i [2022-10-17 17:42:25,294 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/data/f0b81c061/de39631df4b242ca81685a4150e9d88c/FLAGf5b895a57 [2022-10-17 17:42:25,778 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:42:25,779 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i [2022-10-17 17:42:25,785 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/data/f0b81c061/de39631df4b242ca81685a4150e9d88c/FLAGf5b895a57 [2022-10-17 17:42:26,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/data/f0b81c061/de39631df4b242ca81685a4150e9d88c [2022-10-17 17:42:26,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:42:26,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:42:26,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:26,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:42:26,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:42:26,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:26" (1/1) ... [2022-10-17 17:42:26,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17571abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:26, skipping insertion in model container [2022-10-17 17:42:26,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:26" (1/1) ... [2022-10-17 17:42:26,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:42:26,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:42:26,483 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_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i[807,820] [2022-10-17 17:42:26,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:42:28,454 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:42:28,468 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_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i[807,820] [2022-10-17 17:42:28,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:42:28,516 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:42:28,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28 WrapperNode [2022-10-17 17:42:28,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:28,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:42:28,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:42:28,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:42:28,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28" (1/1) ... [2022-10-17 17:42:28,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28" (1/1) ... [2022-10-17 17:42:28,555 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-10-17 17:42:28,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:42:28,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:42:28,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:42:28,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:42:28,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28" (1/1) ... [2022-10-17 17:42:28,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28" (1/1) ... [2022-10-17 17:42:28,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28" (1/1) ... [2022-10-17 17:42:28,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28" (1/1) ... [2022-10-17 17:42:28,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28" (1/1) ... [2022-10-17 17:42:28,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28" (1/1) ... [2022-10-17 17:42:28,599 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28" (1/1) ... [2022-10-17 17:42:28,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28" (1/1) ... [2022-10-17 17:42:28,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:42:28,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:42:28,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:42:28,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:42:28,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28" (1/1) ... [2022-10-17 17:42:28,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:28,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:28,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:42:28,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:42:28,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:42:28,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:42:28,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:42:28,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:42:28,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:42:28,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:42:28,793 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:42:28,795 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:42:28,953 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:42:29,005 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:42:29,006 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:42:29,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:42:29 BoogieIcfgContainer [2022-10-17 17:42:29,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:42:29,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:42:29,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:42:29,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:42:29,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:42:26" (1/3) ... [2022-10-17 17:42:29,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d2390c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:42:29, skipping insertion in model container [2022-10-17 17:42:29,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:28" (2/3) ... [2022-10-17 17:42:29,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d2390c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:42:29, skipping insertion in model container [2022-10-17 17:42:29,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:42:29" (3/3) ... [2022-10-17 17:42:29,030 INFO L112 eAbstractionObserver]: Analyzing ICFG scalar_loopdep.i [2022-10-17 17:42:29,050 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:42:29,050 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:42:29,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:42:29,115 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1756871e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:42:29,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:42:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-17 17:42:29,138 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:29,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-17 17:42:29,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:29,145 INFO L85 PathProgramCache]: Analyzing trace with hash 73548118, now seen corresponding path program 1 times [2022-10-17 17:42:29,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:29,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085239598] [2022-10-17 17:42:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:29,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:29,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:29,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085239598] [2022-10-17 17:42:29,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085239598] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:29,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:29,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:42:29,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014479952] [2022-10-17 17:42:29,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:29,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:29,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:29,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:29,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:29,383 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:29,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:29,424 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-10-17 17:42:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:29,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-10-17 17:42:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:29,437 INFO L225 Difference]: With dead ends: 20 [2022-10-17 17:42:29,437 INFO L226 Difference]: Without dead ends: 13 [2022-10-17 17:42:29,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:29,445 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:29,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:42:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-10-17 17:42:29,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2022-10-17 17:42:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-10-17 17:42:29,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-10-17 17:42:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:29,500 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-10-17 17:42:29,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:29,501 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-10-17 17:42:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 17:42:29,501 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:29,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 17:42:29,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:42:29,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:29,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2017898072, now seen corresponding path program 1 times [2022-10-17 17:42:29,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:29,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374570969] [2022-10-17 17:42:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:29,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:29,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:29,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374570969] [2022-10-17 17:42:29,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374570969] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:29,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609717869] [2022-10-17 17:42:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:29,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:29,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:29,662 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:29,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:42:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:42:29,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:29,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:42:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:29,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609717869] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:42:29,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589281235] [2022-10-17 17:42:29,808 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-10-17 17:42:29,808 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:42:29,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:42:29,818 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:42:29,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:42:29,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-10-17 17:42:29,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-10-17 17:42:30,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:30,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 173 [2022-10-17 17:42:30,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-10-17 17:42:30,258 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:42:30,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '87#(and (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 100 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= 100 |ULTIMATE.start_main_#t~mem4#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:42:30,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:42:30,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:42:30,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-17 17:42:30,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935299200] [2022-10-17 17:42:30,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:42:30,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:42:30,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:30,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:42:30,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:42:30,385 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:30,464 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-10-17 17:42:30,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:42:30,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 17:42:30,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:30,467 INFO L225 Difference]: With dead ends: 32 [2022-10-17 17:42:30,467 INFO L226 Difference]: Without dead ends: 27 [2022-10-17 17:42:30,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:42:30,470 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:30,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-17 17:42:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 11. [2022-10-17 17:42:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-10-17 17:42:30,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-10-17 17:42:30,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:30,480 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-10-17 17:42:30,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-10-17 17:42:30,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:42:30,482 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:30,482 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2022-10-17 17:42:30,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:30,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:30,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1446197802, now seen corresponding path program 2 times [2022-10-17 17:42:30,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:30,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960890038] [2022-10-17 17:42:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:30,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:30,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960890038] [2022-10-17 17:42:30,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960890038] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:30,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751498994] [2022-10-17 17:42:30,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:42:30,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:30,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:30,971 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:30,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:42:31,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 17:42:31,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:42:31,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:42:31,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:31,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:42:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:31,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751498994] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:42:31,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676473100] [2022-10-17 17:42:31,156 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-10-17 17:42:31,157 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:42:31,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:42:31,157 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:42:31,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:42:31,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-10-17 17:42:31,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-10-17 17:42:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:31,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 177 [2022-10-17 17:42:31,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-10-17 17:42:31,416 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:42:31,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '212#(and (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 100 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= 100 |ULTIMATE.start_main_#t~mem4#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:42:31,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:42:31,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:42:31,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-10-17 17:42:31,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901479283] [2022-10-17 17:42:31,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:42:31,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 17:42:31,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:31,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 17:42:31,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2022-10-17 17:42:31,530 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 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) [2022-10-17 17:42:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:31,636 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-10-17 17:42:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 17:42:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 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) Word has length 9 [2022-10-17 17:42:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:31,639 INFO L225 Difference]: With dead ends: 68 [2022-10-17 17:42:31,639 INFO L226 Difference]: Without dead ends: 63 [2022-10-17 17:42:31,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2022-10-17 17:42:31,649 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:31,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 30 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-10-17 17:42:31,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 17. [2022-10-17 17:42:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-10-17 17:42:31,657 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2022-10-17 17:42:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:31,657 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-10-17 17:42:31,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 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) [2022-10-17 17:42:31,657 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-10-17 17:42:31,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:42:31,658 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:31,658 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2022-10-17 17:42:31,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:31,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:31,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash -72035178, now seen corresponding path program 3 times [2022-10-17 17:42:31,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:31,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600047465] [2022-10-17 17:42:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:31,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:32,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:32,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600047465] [2022-10-17 17:42:32,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600047465] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:32,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671027351] [2022-10-17 17:42:32,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:42:32,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:32,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:32,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:32,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:42:32,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:42:32,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:42:32,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 17:42:32,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:32,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:42:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:32,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671027351] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:42:32,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694483114] [2022-10-17 17:42:32,579 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-10-17 17:42:32,579 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:42:32,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:42:32,580 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:42:32,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:42:32,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-10-17 17:42:32,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-10-17 17:42:32,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:32,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 170 [2022-10-17 17:42:32,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-10-17 17:42:32,773 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:42:32,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '445#(and (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 100 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= 100 |ULTIMATE.start_main_#t~mem4#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:42:32,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:42:32,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:42:32,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-10-17 17:42:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874288979] [2022-10-17 17:42:32,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:42:32,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-17 17:42:32,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:32,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-17 17:42:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2022-10-17 17:42:32,869 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:33,098 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2022-10-17 17:42:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-17 17:42:33,099 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 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 [2022-10-17 17:42:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:33,103 INFO L225 Difference]: With dead ends: 140 [2022-10-17 17:42:33,104 INFO L226 Difference]: Without dead ends: 135 [2022-10-17 17:42:33,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2022-10-17 17:42:33,107 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 348 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:33,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 69 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:42:33,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-10-17 17:42:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 29. [2022-10-17 17:42:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-10-17 17:42:33,129 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2022-10-17 17:42:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:33,130 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-10-17 17:42:33,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-10-17 17:42:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 17:42:33,132 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:33,132 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2022-10-17 17:42:33,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:33,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:33,355 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1175372310, now seen corresponding path program 4 times [2022-10-17 17:42:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:33,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961911571] [2022-10-17 17:42:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:33,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:34,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:34,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961911571] [2022-10-17 17:42:34,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961911571] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:34,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098048369] [2022-10-17 17:42:34,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 17:42:34,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:34,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:34,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:34,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:42:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:34,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-17 17:42:34,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:42:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:34,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:42:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:35,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098048369] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:42:35,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1411934404] [2022-10-17 17:42:35,080 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-10-17 17:42:35,080 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:42:35,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:42:35,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:42:35,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:42:35,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-10-17 17:42:35,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-10-17 17:42:35,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:42:35,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 172 [2022-10-17 17:42:35,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-10-17 17:42:35,238 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:42:35,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '894#(and (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 100 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= 100 |ULTIMATE.start_main_#t~mem4#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:42:35,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:42:35,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:42:35,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-10-17 17:42:35,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072078140] [2022-10-17 17:42:35,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:42:35,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-10-17 17:42:35,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:35,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-10-17 17:42:35,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2022-10-17 17:42:35,350 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:35,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:35,902 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2022-10-17 17:42:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-10-17 17:42:35,903 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-17 17:42:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:35,906 INFO L225 Difference]: With dead ends: 284 [2022-10-17 17:42:35,906 INFO L226 Difference]: Without dead ends: 279 [2022-10-17 17:42:35,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2022-10-17 17:42:35,909 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 564 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:35,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 138 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:42:35,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-10-17 17:42:35,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 53. [2022-10-17 17:42:35,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:35,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-10-17 17:42:35,921 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2022-10-17 17:42:35,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:35,921 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-10-17 17:42:35,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-10-17 17:42:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-17 17:42:35,924 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:35,924 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2022-10-17 17:42:35,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:42:36,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:36,151 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:42:36,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:36,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1077533974, now seen corresponding path program 5 times [2022-10-17 17:42:36,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:36,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148401687] [2022-10-17 17:42:36,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:36,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:38,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:38,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148401687] [2022-10-17 17:42:38,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148401687] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:42:38,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500878596] [2022-10-17 17:42:38,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:42:38,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:42:38,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:38,218 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:42:38,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c77bcaa2-bf6a-4ec9-b5cd-7c707f61a5e5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process