./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur --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 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- 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-38b53e6 [2022-11-25 22:26:20,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:26:20,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:26:20,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:26:20,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:26:20,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:26:20,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:26:20,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:26:20,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:26:20,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:26:20,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:26:20,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:26:20,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:26:20,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:26:20,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:26:20,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:26:20,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:26:20,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:26:20,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:26:20,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:26:20,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:26:20,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:26:20,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:26:20,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:26:21,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:26:21,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:26:21,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:26:21,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:26:21,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:26:21,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:26:21,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:26:21,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:26:21,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:26:21,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:26:21,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:26:21,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:26:21,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:26:21,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:26:21,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:26:21,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:26:21,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:26:21,031 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:26:21,080 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:26:21,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:26:21,081 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:26:21,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:26:21,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:26:21,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:26:21,083 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:26:21,083 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:26:21,083 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:26:21,084 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:26:21,084 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:26:21,084 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:26:21,085 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:26:21,085 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:26:21,085 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:26:21,086 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:26:21,086 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:26:21,086 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:26:21,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:26:21,088 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:26:21,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:26:21,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:26:21,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:26:21,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:26:21,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:26:21,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:26:21,091 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:26:21,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:26:21,092 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:26:21,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:26:21,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:26:21,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:26:21,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:26:21,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:26:21,094 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:26:21,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:26:21,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:26:21,095 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:26:21,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:26:21,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:26:21,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:26:21,096 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_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2022-11-25 22:26:21,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:26:21,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:26:21,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:26:21,563 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:26:21,564 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:26:21,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2022-11-25 22:26:24,791 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:26:24,995 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:26:24,999 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2022-11-25 22:26:25,004 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/data/9e621274c/fc6ca397104244f6aada5615dd8e62e8/FLAG8fa25200c [2022-11-25 22:26:25,018 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/data/9e621274c/fc6ca397104244f6aada5615dd8e62e8 [2022-11-25 22:26:25,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:26:25,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:26:25,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:26:25,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:26:25,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:26:25,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67a7253d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25, skipping insertion in model container [2022-11-25 22:26:25,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:26:25,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:26:25,216 WARN L237 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_b69e2399-63c3-4fd6-9e47-896cc5707cae/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2022-11-25 22:26:25,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:26:25,243 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:26:25,254 WARN L237 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_b69e2399-63c3-4fd6-9e47-896cc5707cae/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2022-11-25 22:26:25,262 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:26:25,277 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:26:25,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25 WrapperNode [2022-11-25 22:26:25,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:26:25,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:26:25,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:26:25,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:26:25,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,321 INFO L138 Inliner]: procedures = 17, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2022-11-25 22:26:25,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:26:25,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:26:25,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:26:25,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:26:25,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,350 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:26:25,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:26:25,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:26:25,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:26:25,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25" (1/1) ... [2022-11-25 22:26:25,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:26:25,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:25,410 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:26:25,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:26:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:26:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:26:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:26:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:26:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:26:25,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:26:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:26:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:26:25,575 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:26:25,578 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:26:25,789 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:26:25,853 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:26:25,856 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 22:26:25,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:26:25 BoogieIcfgContainer [2022-11-25 22:26:25,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:26:25,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:26:25,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:26:25,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:26:25,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:26:25" (1/3) ... [2022-11-25 22:26:25,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b91f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:26:25, skipping insertion in model container [2022-11-25 22:26:25,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:26:25" (2/3) ... [2022-11-25 22:26:25,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b91f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:26:25, skipping insertion in model container [2022-11-25 22:26:25,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:26:25" (3/3) ... [2022-11-25 22:26:25,881 INFO L112 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2022-11-25 22:26:25,905 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:26:25,905 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:26:25,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:26:25,995 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;@189e26d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:26:25,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:26:26,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 22:26:26,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:26,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:26,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:26,028 INFO L85 PathProgramCache]: Analyzing trace with hash 721191376, now seen corresponding path program 1 times [2022-11-25 22:26:26,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:26,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840102695] [2022-11-25 22:26:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:26,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:26:26,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:26,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840102695] [2022-11-25 22:26:26,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840102695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:26:26,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:26:26,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:26:26,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257255381] [2022-11-25 22:26:26,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:26:26,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:26:26,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:26,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:26:26,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:26:26,362 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:26,430 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-11-25 22:26:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:26:26,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 22:26:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:26,443 INFO L225 Difference]: With dead ends: 27 [2022-11-25 22:26:26,443 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 22:26:26,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:26:26,457 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:26,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:26:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 22:26:26,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 11. [2022-11-25 22:26:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-11-25 22:26:26,536 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2022-11-25 22:26:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:26,537 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-11-25 22:26:26,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-11-25 22:26:26,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 22:26:26,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:26,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:26,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:26:26,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:26,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:26,553 INFO L85 PathProgramCache]: Analyzing trace with hash 801657582, now seen corresponding path program 1 times [2022-11-25 22:26:26,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:26,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297677940] [2022-11-25 22:26:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:26,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:26:26,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:26,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297677940] [2022-11-25 22:26:26,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297677940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:26,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123089647] [2022-11-25 22:26:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:26,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:26,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:26,743 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:26,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:26:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:26:26,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:26:26,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:26:26,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123089647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:26:26,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:26:26,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-25 22:26:26,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387225641] [2022-11-25 22:26:26,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:26:26,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:26:26,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:26,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:26:26,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:26:26,971 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:27,002 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2022-11-25 22:26:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:26:27,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 22:26:27,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:27,008 INFO L225 Difference]: With dead ends: 21 [2022-11-25 22:26:27,008 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 22:26:27,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:26:27,017 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:27,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:26:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 22:26:27,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-25 22:26:27,028 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) [2022-11-25 22:26:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-25 22:26:27,031 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2022-11-25 22:26:27,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:27,032 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-25 22:26:27,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-25 22:26:27,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 22:26:27,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:27,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:27,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:27,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:27,241 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:27,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:27,242 INFO L85 PathProgramCache]: Analyzing trace with hash -299864784, now seen corresponding path program 1 times [2022-11-25 22:26:27,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:27,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786303164] [2022-11-25 22:26:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:27,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:26:27,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:27,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786303164] [2022-11-25 22:26:27,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786303164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:27,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647875643] [2022-11-25 22:26:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:27,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:27,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:27,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:27,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:26:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:27,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:26:27,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:26:27,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:26:27,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647875643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:27,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771139858] [2022-11-25 22:26:27,649 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:26:27,650 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:27,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:27,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:27,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:27,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:27,811 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:26:27,813 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:26:27,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:27,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:26:27,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:27,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:26:28,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:28,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:28,131 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:26:28,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-25 22:26:28,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:26:28,505 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:28,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '193#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:28,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:28,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:28,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-25 22:26:28,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997415368] [2022-11-25 22:26:28,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:28,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:26:28,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:28,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:26:28,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:26:28,854 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2022-11-25 22:26:28,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:28,916 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-11-25 22:26:28,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:26:28,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2022-11-25 22:26:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:28,918 INFO L225 Difference]: With dead ends: 39 [2022-11-25 22:26:28,918 INFO L226 Difference]: Without dead ends: 30 [2022-11-25 22:26:28,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:26:28,920 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:28,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 25 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:26:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-25 22:26:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 16. [2022-11-25 22:26:28,925 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) [2022-11-25 22:26:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-25 22:26:28,926 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-11-25 22:26:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:28,927 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-25 22:26:28,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2022-11-25 22:26:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-25 22:26:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 22:26:28,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:28,928 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:28,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:29,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 22:26:29,135 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:29,135 INFO L85 PathProgramCache]: Analyzing trace with hash 751908112, now seen corresponding path program 2 times [2022-11-25 22:26:29,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:29,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276343674] [2022-11-25 22:26:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:29,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:26:29,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:29,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276343674] [2022-11-25 22:26:29,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276343674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:29,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908622789] [2022-11-25 22:26:29,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:26:29,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:29,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:29,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:29,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:26:29,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:26:29,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:26:29,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:26:29,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:26:29,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:26:29,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908622789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:29,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1011094503] [2022-11-25 22:26:29,444 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:26:29,444 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:29,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:29,444 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:29,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:29,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:29,490 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:26:29,490 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:26:29,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:29,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:26:29,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:29,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:26:29,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:29,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:29,664 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 22:26:29,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 226 [2022-11-25 22:26:29,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:26:29,889 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:30,163 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '357#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:30,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:30,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:30,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 22:26:30,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356016887] [2022-11-25 22:26:30,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:30,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:26:30,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:26:30,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:26:30,166 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:30,227 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-11-25 22:26:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:26:30,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 22:26:30,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:30,228 INFO L225 Difference]: With dead ends: 63 [2022-11-25 22:26:30,229 INFO L226 Difference]: Without dead ends: 56 [2022-11-25 22:26:30,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:26:30,230 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:30,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 35 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:26:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-25 22:26:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 20. [2022-11-25 22:26:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-25 22:26:30,235 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2022-11-25 22:26:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:30,236 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-25 22:26:30,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-25 22:26:30,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 22:26:30,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:30,237 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:30,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:30,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:30,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:30,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:30,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1111495536, now seen corresponding path program 3 times [2022-11-25 22:26:30,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:30,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13217200] [2022-11-25 22:26:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:30,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:26:30,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:30,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13217200] [2022-11-25 22:26:30,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13217200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:30,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257813933] [2022-11-25 22:26:30,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:26:30,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:30,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:30,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:30,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:26:30,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:26:30,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:26:30,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:26:30,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 22:26:30,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 22:26:31,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257813933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:31,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [913456765] [2022-11-25 22:26:31,019 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:26:31,019 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:31,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:31,021 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:31,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:31,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:31,069 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:26:31,069 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:26:31,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:31,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:26:31,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:31,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:26:31,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:31,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:31,245 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:26:31,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-25 22:26:31,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:26:31,524 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:31,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '593#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:31,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:31,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:31,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2022-11-25 22:26:31,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10620123] [2022-11-25 22:26:31,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:31,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:26:31,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:26:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2022-11-25 22:26:31,826 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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) [2022-11-25 22:26:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:31,956 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2022-11-25 22:26:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 22:26:31,957 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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) Word has length 17 [2022-11-25 22:26:31,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:31,958 INFO L225 Difference]: With dead ends: 90 [2022-11-25 22:26:31,959 INFO L226 Difference]: Without dead ends: 76 [2022-11-25 22:26:31,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2022-11-25 22:26:31,960 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 161 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:31,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 55 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:26:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-25 22:26:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 27. [2022-11-25 22:26:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-25 22:26:31,969 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2022-11-25 22:26:31,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:31,969 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-25 22:26:31,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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) [2022-11-25 22:26:31,971 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-25 22:26:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 22:26:31,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:31,972 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:31,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:32,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:32,179 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:32,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:32,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1942026478, now seen corresponding path program 4 times [2022-11-25 22:26:32,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:32,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075027458] [2022-11-25 22:26:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:32,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 22:26:32,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:32,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075027458] [2022-11-25 22:26:32,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075027458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:32,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197465428] [2022-11-25 22:26:32,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:26:32,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:32,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:32,376 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:32,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:26:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:32,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 22:26:32,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 22:26:32,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 22:26:33,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197465428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:33,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1432253755] [2022-11-25 22:26:33,050 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:26:33,050 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:33,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:33,051 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:33,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:33,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:33,083 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:26:33,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 26 [2022-11-25 22:26:33,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:33,123 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:26:33,123 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:26:33,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:33,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:26:33,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:33,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:33,264 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:26:33,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-25 22:26:33,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:26:33,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:33,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '940#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:33,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:33,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:33,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 32 [2022-11-25 22:26:33,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593222132] [2022-11-25 22:26:33,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:33,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 22:26:33,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 22:26:33,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 22:26:33,865 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:34,009 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2022-11-25 22:26:34,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 22:26:34,010 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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 24 [2022-11-25 22:26:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:34,014 INFO L225 Difference]: With dead ends: 111 [2022-11-25 22:26:34,015 INFO L226 Difference]: Without dead ends: 96 [2022-11-25 22:26:34,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 22:26:34,018 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 147 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:34,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 60 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:26:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-25 22:26:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 40. [2022-11-25 22:26:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-11-25 22:26:34,036 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2022-11-25 22:26:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:34,036 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-11-25 22:26:34,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-11-25 22:26:34,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 22:26:34,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:34,038 INFO L195 NwaCegarLoop]: trace histogram [22, 8, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:34,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:34,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:34,248 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:34,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:34,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1369821680, now seen corresponding path program 5 times [2022-11-25 22:26:34,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:34,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313350463] [2022-11-25 22:26:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:34,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-25 22:26:34,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:34,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313350463] [2022-11-25 22:26:34,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313350463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:34,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658863605] [2022-11-25 22:26:34,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:26:34,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:34,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:34,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:34,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:26:34,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 22:26:34,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:26:34,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 22:26:34,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-25 22:26:34,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-25 22:26:34,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658863605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:34,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098555890] [2022-11-25 22:26:34,864 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:26:34,864 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:34,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:34,865 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:34,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:34,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:34,891 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:26:34,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 26 [2022-11-25 22:26:34,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:34,920 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:26:34,920 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:26:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:34,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:26:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:35,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:35,067 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:26:35,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-25 22:26:35,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:26:35,280 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:35,565 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1416#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:35,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:35,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:35,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-25 22:26:35,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101981669] [2022-11-25 22:26:35,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:35,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 22:26:35,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 22:26:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=365, Unknown=0, NotChecked=0, Total=650 [2022-11-25 22:26:35,568 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2022-11-25 22:26:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:35,747 INFO L93 Difference]: Finished difference Result 177 states and 208 transitions. [2022-11-25 22:26:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 22:26:35,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) Word has length 37 [2022-11-25 22:26:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:35,754 INFO L225 Difference]: With dead ends: 177 [2022-11-25 22:26:35,754 INFO L226 Difference]: Without dead ends: 170 [2022-11-25 22:26:35,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=365, Unknown=0, NotChecked=0, Total=650 [2022-11-25 22:26:35,756 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 273 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:35,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 90 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:26:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-25 22:26:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 50. [2022-11-25 22:26:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-11-25 22:26:35,771 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 37 [2022-11-25 22:26:35,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:35,772 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-11-25 22:26:35,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2022-11-25 22:26:35,772 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-11-25 22:26:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 22:26:35,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:35,777 INFO L195 NwaCegarLoop]: trace histogram [22, 18, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:35,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:35,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 22:26:35,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:35,983 INFO L85 PathProgramCache]: Analyzing trace with hash 190263504, now seen corresponding path program 6 times [2022-11-25 22:26:35,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:35,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064601829] [2022-11-25 22:26:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:35,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-25 22:26:36,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:36,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064601829] [2022-11-25 22:26:36,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064601829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:36,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413380998] [2022-11-25 22:26:36,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:26:36,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:36,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:36,632 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:36,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:26:36,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:26:36,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:26:36,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 22:26:36,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-25 22:26:37,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-25 22:26:38,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413380998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:38,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1811860844] [2022-11-25 22:26:38,750 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:26:38,750 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:38,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:38,751 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:38,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:38,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:38,809 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:26:38,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 26 [2022-11-25 22:26:38,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:38,844 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:26:38,845 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:26:38,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:38,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:26:38,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:38,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:38,961 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:26:38,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-25 22:26:39,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:26:39,201 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:39,588 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2096#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:39,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:39,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:39,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 67 [2022-11-25 22:26:39,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340031795] [2022-11-25 22:26:39,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:39,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-25 22:26:39,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-25 22:26:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1412, Invalid=3700, Unknown=0, NotChecked=0, Total=5112 [2022-11-25 22:26:39,594 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:39,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:39,879 INFO L93 Difference]: Finished difference Result 234 states and 283 transitions. [2022-11-25 22:26:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-25 22:26:39,880 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 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 47 [2022-11-25 22:26:39,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:39,882 INFO L225 Difference]: With dead ends: 234 [2022-11-25 22:26:39,882 INFO L226 Difference]: Without dead ends: 208 [2022-11-25 22:26:39,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1412, Invalid=3700, Unknown=0, NotChecked=0, Total=5112 [2022-11-25 22:26:39,886 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 406 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:39,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 115 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:26:39,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-25 22:26:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 75. [2022-11-25 22:26:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-11-25 22:26:39,898 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 47 [2022-11-25 22:26:39,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:39,898 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-11-25 22:26:39,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-11-25 22:26:39,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:26:39,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:39,900 INFO L195 NwaCegarLoop]: trace histogram [46, 19, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:39,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:40,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 22:26:40,106 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1442170606, now seen corresponding path program 7 times [2022-11-25 22:26:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:40,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882772146] [2022-11-25 22:26:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:40,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-25 22:26:41,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:41,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882772146] [2022-11-25 22:26:41,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882772146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:41,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213042554] [2022-11-25 22:26:41,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:26:41,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:41,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:41,089 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:41,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:26:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:41,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 22:26:41,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-25 22:26:43,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-25 22:26:47,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213042554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:47,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [999894456] [2022-11-25 22:26:47,540 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:26:47,540 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:47,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:47,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:47,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:47,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:47,574 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:26:47,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 26 [2022-11-25 22:26:47,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:47,608 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:26:47,608 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:26:47,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:47,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:26:47,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:47,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:47,737 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:26:47,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-25 22:26:47,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:26:47,961 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:48,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3127#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:48,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:48,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:48,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 48, 48] total 116 [2022-11-25 22:26:48,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680427784] [2022-11-25 22:26:48,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:48,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-25 22:26:48,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:48,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-25 22:26:48,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4868, Invalid=9652, Unknown=0, NotChecked=0, Total=14520 [2022-11-25 22:26:48,484 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 116 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:48,947 INFO L93 Difference]: Finished difference Result 291 states and 365 transitions. [2022-11-25 22:26:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-25 22:26:48,948 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 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 72 [2022-11-25 22:26:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:48,950 INFO L225 Difference]: With dead ends: 291 [2022-11-25 22:26:48,950 INFO L226 Difference]: Without dead ends: 264 [2022-11-25 22:26:48,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2635 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4868, Invalid=9652, Unknown=0, NotChecked=0, Total=14520 [2022-11-25 22:26:48,956 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 357 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:48,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 140 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:26:48,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-25 22:26:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 124. [2022-11-25 22:26:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-11-25 22:26:48,972 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 72 [2022-11-25 22:26:48,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:48,973 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-11-25 22:26:48,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-11-25 22:26:48,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-25 22:26:48,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:48,975 INFO L195 NwaCegarLoop]: trace histogram [94, 20, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:48,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:49,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 22:26:49,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash 592374672, now seen corresponding path program 8 times [2022-11-25 22:26:49,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:49,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897211729] [2022-11-25 22:26:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:49,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4675 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-25 22:26:50,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:50,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897211729] [2022-11-25 22:26:50,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897211729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:50,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075907827] [2022-11-25 22:26:50,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:26:50,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:50,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:50,695 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:50,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:26:51,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-25 22:26:51,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:26:51,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 22:26:51,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4675 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-25 22:26:51,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4675 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-25 22:26:52,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075907827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:52,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671536157] [2022-11-25 22:26:52,029 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:26:52,029 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:52,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:52,029 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:52,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:52,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:52,071 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:26:52,072 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:26:52,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:52,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:26:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:52,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:26:52,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:52,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:52,247 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:26:52,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-25 22:26:52,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:26:52,475 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:52,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4587#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:52,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:52,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:52,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-25 22:26:52,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413316671] [2022-11-25 22:26:52,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:52,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-25 22:26:52,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:52,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-25 22:26:52,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1137, Invalid=1313, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 22:26:52,763 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:53,265 INFO L93 Difference]: Finished difference Result 441 states and 508 transitions. [2022-11-25 22:26:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 22:26:53,267 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 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 121 [2022-11-25 22:26:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:53,270 INFO L225 Difference]: With dead ends: 441 [2022-11-25 22:26:53,271 INFO L226 Difference]: Without dead ends: 434 [2022-11-25 22:26:53,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1137, Invalid=1313, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 22:26:53,273 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 966 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:53,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 210 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:26:53,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-25 22:26:53,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 146. [2022-11-25 22:26:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 145 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2022-11-25 22:26:53,291 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 121 [2022-11-25 22:26:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:53,292 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2022-11-25 22:26:53,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:26:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2022-11-25 22:26:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-25 22:26:53,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:53,295 INFO L195 NwaCegarLoop]: trace histogram [94, 42, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:26:53,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:53,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:26:53,503 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:53,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:53,503 INFO L85 PathProgramCache]: Analyzing trace with hash -409594672, now seen corresponding path program 9 times [2022-11-25 22:26:53,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:53,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255464243] [2022-11-25 22:26:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:53,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-25 22:26:56,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:56,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255464243] [2022-11-25 22:26:56,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255464243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:56,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301982733] [2022-11-25 22:26:56,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:26:56,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:56,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:56,558 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:56,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:26:56,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:26:56,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:26:56,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-25 22:26:56,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-11-25 22:27:04,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:27:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-11-25 22:27:20,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301982733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:27:20,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700958341] [2022-11-25 22:27:20,166 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:27:20,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:27:20,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:27:20,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:27:20,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:20,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:20,200 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:27:20,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 26 [2022-11-25 22:27:20,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:20,236 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:27:20,236 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:27:20,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:20,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:27:20,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:20,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:27:20,352 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 22:27:20,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 226 [2022-11-25 22:27:20,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:27:20,503 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:21,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6587#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:27:21,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:27:21,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:27:21,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 96, 96] total 235 [2022-11-25 22:27:21,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437746023] [2022-11-25 22:27:21,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:27:21,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2022-11-25 22:27:21,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:21,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2022-11-25 22:27:21,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19472, Invalid=37888, Unknown=0, NotChecked=0, Total=57360 [2022-11-25 22:27:21,293 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 235 states, 235 states have (on average 1.0382978723404255) internal successors, (244), 235 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:22,437 INFO L93 Difference]: Finished difference Result 594 states and 739 transitions. [2022-11-25 22:27:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-11-25 22:27:22,438 INFO L78 Accepts]: Start accepts. Automaton has has 235 states, 235 states have (on average 1.0382978723404255) internal successors, (244), 235 states have internal predecessors, (244), 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 143 [2022-11-25 22:27:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:22,440 INFO L225 Difference]: With dead ends: 594 [2022-11-25 22:27:22,441 INFO L226 Difference]: Without dead ends: 544 [2022-11-25 22:27:22,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9733 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=19472, Invalid=37888, Unknown=0, NotChecked=0, Total=57360 [2022-11-25 22:27:22,448 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1162 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:22,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 250 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:27:22,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-11-25 22:27:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 243. [2022-11-25 22:27:22,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0165289256198347) internal successors, (246), 242 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 246 transitions. [2022-11-25 22:27:22,475 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 246 transitions. Word has length 143 [2022-11-25 22:27:22,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:22,476 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 246 transitions. [2022-11-25 22:27:22,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 235 states, 235 states have (on average 1.0382978723404255) internal successors, (244), 235 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:27:22,476 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 246 transitions. [2022-11-25 22:27:22,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-25 22:27:22,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:22,481 INFO L195 NwaCegarLoop]: trace histogram [190, 43, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:22,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 22:27:22,688 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash -427545618, now seen corresponding path program 10 times [2022-11-25 22:27:22,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:22,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183342600] [2022-11-25 22:27:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:22,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 19091 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-11-25 22:27:26,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:26,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183342600] [2022-11-25 22:27:26,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183342600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:26,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540146476] [2022-11-25 22:27:26,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:27:26,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:26,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:26,647 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:26,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:27:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:27,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1949 conjuncts, 194 conjunts are in the unsatisfiable core [2022-11-25 22:27:27,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19091 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-11-25 22:27:49,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 19091 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-11-25 22:28:44,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540146476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:44,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97018678] [2022-11-25 22:28:44,210 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:28:44,211 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:44,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:44,211 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:44,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:44,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:44,238 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:28:44,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 26 [2022-11-25 22:28:44,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:44,264 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:28:44,264 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:28:44,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:44,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:28:44,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:28:44,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:28:44,365 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:28:44,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-25 22:28:44,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:28:44,563 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:45,746 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9850#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:28:45,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:45,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:28:45,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 192, 192] total 428 [2022-11-25 22:28:45,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388283828] [2022-11-25 22:28:45,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:45,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 428 states [2022-11-25 22:28:45,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 428 interpolants. [2022-11-25 22:28:45,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74720, Invalid=112336, Unknown=0, NotChecked=0, Total=187056 [2022-11-25 22:28:45,769 INFO L87 Difference]: Start difference. First operand 243 states and 246 transitions. Second operand has 428 states, 428 states have (on average 1.0210280373831775) internal successors, (437), 428 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:28:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:48,941 INFO L93 Difference]: Finished difference Result 795 states and 1037 transitions. [2022-11-25 22:28:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 428 states. [2022-11-25 22:28:48,943 INFO L78 Accepts]: Start accepts. Automaton has has 428 states, 428 states have (on average 1.0210280373831775) internal successors, (437), 428 states have internal predecessors, (437), 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 240 [2022-11-25 22:28:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:48,947 INFO L225 Difference]: With dead ends: 795 [2022-11-25 22:28:48,947 INFO L226 Difference]: Without dead ends: 744 [2022-11-25 22:28:48,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19627 ImplicationChecksByTransitivity, 77.8s TimeCoverageRelationStatistics Valid=74720, Invalid=112336, Unknown=0, NotChecked=0, Total=187056 [2022-11-25 22:28:48,963 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1330 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1330 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:48,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1330 Valid, 270 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:28:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-11-25 22:28:49,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 436. [2022-11-25 22:28:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.0091954022988505) internal successors, (439), 435 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:28:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 439 transitions. [2022-11-25 22:28:49,008 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 439 transitions. Word has length 240 [2022-11-25 22:28:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:49,009 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 439 transitions. [2022-11-25 22:28:49,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 428 states, 428 states have (on average 1.0210280373831775) internal successors, (437), 428 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:28:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 439 transitions. [2022-11-25 22:28:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-25 22:28:49,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:49,025 INFO L195 NwaCegarLoop]: trace histogram [382, 44, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:49,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:49,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 22:28:49,232 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:49,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:49,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1080218768, now seen corresponding path program 11 times [2022-11-25 22:28:49,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:49,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596473976] [2022-11-25 22:28:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:49,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 74143 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-25 22:28:54,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:54,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596473976] [2022-11-25 22:28:54,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596473976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:54,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454965051] [2022-11-25 22:28:54,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:28:54,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:54,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:54,390 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:54,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:29:13,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-25 22:29:13,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:29:13,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 22:29:13,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:29:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 74143 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-25 22:29:13,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:29:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 74143 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-25 22:29:15,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454965051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:29:15,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [230591726] [2022-11-25 22:29:15,986 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:29:15,986 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:29:15,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:29:15,987 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:29:15,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:29:16,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:16,015 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:29:16,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 26 [2022-11-25 22:29:16,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:16,038 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:29:16,039 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:29:16,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:16,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:29:16,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:29:16,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:29:16,159 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:29:16,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-25 22:29:16,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:29:16,441 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:29:16,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14718#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:29:16,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:29:16,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:29:16,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-11-25 22:29:16,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017418776] [2022-11-25 22:29:16,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:29:16,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-25 22:29:16,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:16,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-25 22:29:16,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4569, Invalid=4937, Unknown=0, NotChecked=0, Total=9506 [2022-11-25 22:29:16,764 INFO L87 Difference]: Start difference. First operand 436 states and 439 transitions. Second operand has 93 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:19,492 INFO L93 Difference]: Finished difference Result 1113 states and 1252 transitions. [2022-11-25 22:29:19,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-25 22:29:19,492 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 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 433 [2022-11-25 22:29:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:19,500 INFO L225 Difference]: With dead ends: 1113 [2022-11-25 22:29:19,500 INFO L226 Difference]: Without dead ends: 1106 [2022-11-25 22:29:19,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1344 GetRequests, 1248 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4569, Invalid=4937, Unknown=0, NotChecked=0, Total=9506 [2022-11-25 22:29:19,502 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2569 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2569 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:19,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2569 Valid, 450 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:29:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-11-25 22:29:19,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 482. [2022-11-25 22:29:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.0083160083160083) internal successors, (485), 481 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 485 transitions. [2022-11-25 22:29:19,539 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 485 transitions. Word has length 433 [2022-11-25 22:29:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:19,540 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 485 transitions. [2022-11-25 22:29:19,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:29:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 485 transitions. [2022-11-25 22:29:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-11-25 22:29:19,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:19,550 INFO L195 NwaCegarLoop]: trace histogram [382, 90, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:19,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:29:19,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 22:29:19,763 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:29:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:19,764 INFO L85 PathProgramCache]: Analyzing trace with hash 155912912, now seen corresponding path program 12 times [2022-11-25 22:29:19,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:19,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483816596] [2022-11-25 22:29:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:19,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 77248 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-25 22:29:30,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:30,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483816596] [2022-11-25 22:29:30,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483816596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:29:30,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423668694] [2022-11-25 22:29:30,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:29:30,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:30,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:29:30,589 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:29:30,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 22:29:31,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:29:31,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:29:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 3865 conjuncts, 386 conjunts are in the unsatisfiable core [2022-11-25 22:29:31,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:30:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 77248 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2022-11-25 22:30:57,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 77248 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2022-11-25 22:34:40,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423668694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:40,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567642956] [2022-11-25 22:34:40,808 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:34:40,808 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:40,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:40,809 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:40,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:40,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:40,842 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:34:40,842 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-25 22:34:40,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:40,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 22:34:40,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:40,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:34:40,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:40,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:40,952 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:34:40,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-25 22:34:41,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:34:41,124 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:34:43,299 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21086#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:34:43,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:34:43,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:34:43,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 384, 384] total 859 [2022-11-25 22:34:43,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488683180] [2022-11-25 22:34:43,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:34:43,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 859 states [2022-11-25 22:34:43,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:43,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 859 interpolants. [2022-11-25 22:34:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299096, Invalid=446536, Unknown=0, NotChecked=0, Total=745632 [2022-11-25 22:34:43,377 INFO L87 Difference]: Start difference. First operand 482 states and 485 transitions. Second operand has 859 states, 859 states have (on average 1.010477299185099) internal successors, (868), 859 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:35:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:09,772 INFO L93 Difference]: Finished difference Result 1602 states and 2083 transitions. [2022-11-25 22:35:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 859 states. [2022-11-25 22:35:09,774 INFO L78 Accepts]: Start accepts. Automaton has has 859 states, 859 states have (on average 1.010477299185099) internal successors, (868), 859 states have internal predecessors, (868), 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 479 [2022-11-25 22:35:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:09,780 INFO L225 Difference]: With dead ends: 1602 [2022-11-25 22:35:09,780 INFO L226 Difference]: Without dead ends: 1504 [2022-11-25 22:35:09,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 862 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75397 ImplicationChecksByTransitivity, 312.5s TimeCoverageRelationStatistics Valid=299096, Invalid=446536, Unknown=0, NotChecked=0, Total=745632 [2022-11-25 22:35:09,821 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2436 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2436 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:09,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2436 Valid, 515 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 22:35:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-11-25 22:35:09,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 867. [2022-11-25 22:35:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 1.0046189376443417) internal successors, (870), 866 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:35:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 870 transitions. [2022-11-25 22:35:09,875 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 870 transitions. Word has length 479 [2022-11-25 22:35:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:09,876 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 870 transitions. [2022-11-25 22:35:09,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 859 states, 859 states have (on average 1.010477299185099) internal successors, (868), 859 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:35:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 870 transitions. [2022-11-25 22:35:09,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 865 [2022-11-25 22:35:09,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:09,902 INFO L195 NwaCegarLoop]: trace histogram [766, 91, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:09,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 22:35:10,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 22:35:10,115 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:35:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1821841902, now seen corresponding path program 13 times [2022-11-25 22:35:10,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:10,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149515015] [2022-11-25 22:35:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 297947 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 293761 trivial. 0 not checked. [2022-11-25 22:35:26,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:26,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149515015] [2022-11-25 22:35:26,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149515015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:26,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622265359] [2022-11-25 22:35:26,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:35:26,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:26,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:26,361 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:26,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b69e2399-63c3-4fd6-9e47-896cc5707cae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 22:35:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:28,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 7325 conjuncts, 770 conjunts are in the unsatisfiable core [2022-11-25 22:35:28,328 INFO L286 TraceCheckSpWp]: Computing forward predicates...