./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init2_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init2_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW --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 cf1af1de3644d7f65779e1f0fa1695f30c94933219211c16e44b2dad6d7664ff --- 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-4e7fbc6 [2022-11-23 16:08:59,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:08:59,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:09:00,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:09:00,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:09:00,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:09:00,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:09:00,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:09:00,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:09:00,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:09:00,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:09:00,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:09:00,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:09:00,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:09:00,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:09:00,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:09:00,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:09:00,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:09:00,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:09:00,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:09:00,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:09:00,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:09:00,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:09:00,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:09:00,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:09:00,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:09:00,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:09:00,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:09:00,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:09:00,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:09:00,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:09:00,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:09:00,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:09:00,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:09:00,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:09:00,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:09:00,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:09:00,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:09:00,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:09:00,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:09:00,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:09:00,071 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 16:09:00,109 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:09:00,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:09:00,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:09:00,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:09:00,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:09:00,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:09:00,113 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:09:00,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:09:00,113 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:09:00,113 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:09:00,115 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:09:00,115 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:09:00,115 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:09:00,115 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:09:00,116 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:09:00,116 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:09:00,116 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:09:00,117 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:09:00,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:09:00,118 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:09:00,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:09:00,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:09:00,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:09:00,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:09:00,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:09:00,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:09:00,120 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:09:00,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:09:00,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:09:00,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:09:00,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:09:00,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:09:00,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:09:00,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:09:00,123 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:09:00,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:09:00,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:09:00,123 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:09:00,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:09:00,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:09:00,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:09:00,124 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_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf1af1de3644d7f65779e1f0fa1695f30c94933219211c16e44b2dad6d7664ff [2022-11-23 16:09:00,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:09:00,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:09:00,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:09:00,478 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:09:00,479 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:09:00,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_init2_ground-1.i [2022-11-23 16:09:03,499 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:09:03,699 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:09:03,700 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/sv-benchmarks/c/array-examples/standard_init2_ground-1.i [2022-11-23 16:09:03,707 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/data/831a7cb81/0a592d5a0a1a46d382983ecc1ef2444e/FLAG85562022c [2022-11-23 16:09:03,722 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/data/831a7cb81/0a592d5a0a1a46d382983ecc1ef2444e [2022-11-23 16:09:03,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:09:03,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:09:03,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:09:03,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:09:03,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:09:03,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:03,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69bcc59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03, skipping insertion in model container [2022-11-23 16:09:03,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:03,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:09:03,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:09:03,905 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_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/sv-benchmarks/c/array-examples/standard_init2_ground-1.i[816,829] [2022-11-23 16:09:03,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:09:03,932 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:09:03,946 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_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/sv-benchmarks/c/array-examples/standard_init2_ground-1.i[816,829] [2022-11-23 16:09:03,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:09:03,969 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:09:03,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03 WrapperNode [2022-11-23 16:09:03,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:09:03,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:09:03,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:09:03,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:09:03,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:03,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:04,007 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-11-23 16:09:04,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:09:04,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:09:04,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:09:04,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:09:04,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:04,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:04,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:04,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:04,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:04,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:04,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:04,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:04,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:09:04,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:09:04,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:09:04,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:09:04,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03" (1/1) ... [2022-11-23 16:09:04,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:09:04,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:04,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:09:04,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:09:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:09:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:09:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 16:09:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 16:09:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:09:04,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:09:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 16:09:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 16:09:04,218 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:09:04,219 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:09:04,335 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:09:04,364 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:09:04,364 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 16:09:04,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:09:04 BoogieIcfgContainer [2022-11-23 16:09:04,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:09:04,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:09:04,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:09:04,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:09:04,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:09:03" (1/3) ... [2022-11-23 16:09:04,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e43db72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:09:04, skipping insertion in model container [2022-11-23 16:09:04,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:03" (2/3) ... [2022-11-23 16:09:04,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e43db72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:09:04, skipping insertion in model container [2022-11-23 16:09:04,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:09:04" (3/3) ... [2022-11-23 16:09:04,378 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-1.i [2022-11-23 16:09:04,400 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:09:04,400 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 16:09:04,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:09:04,508 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;@29e5f022, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:09:04,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 16:09:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 16:09:04,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:04,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 16:09:04,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:04,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1717294966, now seen corresponding path program 1 times [2022-11-23 16:09:04,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:04,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367577996] [2022-11-23 16:09:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:04,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:09:04,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:04,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367577996] [2022-11-23 16:09:04,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367577996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:04,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:04,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:09:04,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514431666] [2022-11-23 16:09:04,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:04,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:09:04,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:05,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:09:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:05,004 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:05,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:05,044 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-23 16:09:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:09:05,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 16:09:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:05,055 INFO L225 Difference]: With dead ends: 18 [2022-11-23 16:09:05,055 INFO L226 Difference]: Without dead ends: 10 [2022-11-23 16:09:05,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:05,062 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:05,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:09:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-23 16:09:05,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-23 16:09:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-23 16:09:05,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-23 16:09:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:05,101 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-23 16:09:05,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-23 16:09:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 16:09:05,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:05,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:05,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:09:05,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:05,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1691607699, now seen corresponding path program 1 times [2022-11-23 16:09:05,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:05,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897467569] [2022-11-23 16:09:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:05,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:09:05,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:05,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897467569] [2022-11-23 16:09:05,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897467569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:05,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916038113] [2022-11-23 16:09:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:05,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:05,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:05,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:05,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:09:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:05,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 16:09:05,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:09:05,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:09:05,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916038113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:05,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199458777] [2022-11-23 16:09:05,481 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:09:05,482 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:05,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:05,491 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:05,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:05,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:05,630 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:09:05,631 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 [2022-11-23 16:09:05,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:05,690 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:09:05,690 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 [2022-11-23 16:09:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:05,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 16:09:05,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:05,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:09:05,910 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 16:09:05,911 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 177 treesize of output 180 [2022-11-23 16:09:06,022 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 [2022-11-23 16:09:06,061 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 11 treesize of output 7 [2022-11-23 16:09:06,128 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 16:09:06,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2022-11-23 16:09:06,182 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 [2022-11-23 16:09:06,201 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:06,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:06,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:06,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:06,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 16:09:06,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989183534] [2022-11-23 16:09:06,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:06,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:09:06,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:06,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:09:06,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:09:06,335 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:06,373 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-11-23 16:09:06,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:09:06,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 16:09:06,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:06,374 INFO L225 Difference]: With dead ends: 23 [2022-11-23 16:09:06,375 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 16:09:06,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:09:06,377 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:06,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:09:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 16:09:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 16:09:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-23 16:09:06,382 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-23 16:09:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:06,382 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-23 16:09:06,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-23 16:09:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 16:09:06,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:06,384 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:06,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:06,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:06,590 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:06,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1323371850, now seen corresponding path program 2 times [2022-11-23 16:09:06,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:06,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563827862] [2022-11-23 16:09:06,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:06,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:09:06,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:06,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563827862] [2022-11-23 16:09:06,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563827862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:06,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613366098] [2022-11-23 16:09:06,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:09:06,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:06,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:06,766 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:06,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:09:06,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 16:09:06,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:06,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 16:09:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:09:06,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:09:06,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613366098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:06,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1505536199] [2022-11-23 16:09:06,989 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:09:06,989 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:06,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:06,990 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:06,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:07,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:07,020 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:09:07,020 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 [2022-11-23 16:09:07,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:07,062 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:09:07,063 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 [2022-11-23 16:09:07,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:07,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 16:09:07,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:07,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:09:07,160 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 16:09:07,161 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 177 treesize of output 180 [2022-11-23 16:09:07,212 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 [2022-11-23 16:09:07,223 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 [2022-11-23 16:09:07,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2022-11-23 16:09:07,268 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 [2022-11-23 16:09:07,279 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:07,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '263#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:07,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:07,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:07,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 16:09:07,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268220286] [2022-11-23 16:09:07,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:07,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 16:09:07,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:07,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 16:09:07,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-23 16:09:07,392 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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) [2022-11-23 16:09:07,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:07,468 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-11-23 16:09:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 16:09:07,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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) Word has length 14 [2022-11-23 16:09:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:07,470 INFO L225 Difference]: With dead ends: 38 [2022-11-23 16:09:07,470 INFO L226 Difference]: Without dead ends: 28 [2022-11-23 16:09:07,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-23 16:09:07,474 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:07,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:09:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-23 16:09:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-23 16:09:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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) [2022-11-23 16:09:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-23 16:09:07,492 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2022-11-23 16:09:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:07,494 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-23 16:09:07,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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) [2022-11-23 16:09:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-23 16:09:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 16:09:07,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:07,497 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:07,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:07,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:07,705 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:07,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1463801962, now seen corresponding path program 3 times [2022-11-23 16:09:07,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:07,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570443935] [2022-11-23 16:09:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:07,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 16:09:08,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:08,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570443935] [2022-11-23 16:09:08,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570443935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:08,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590164674] [2022-11-23 16:09:08,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:09:08,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:08,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:08,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:08,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:09:08,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:09:08,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:08,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:09:08,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 16:09:08,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 16:09:08,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590164674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:08,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086762412] [2022-11-23 16:09:08,558 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:09:08,558 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:08,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:08,559 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:08,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:08,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:08,592 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:09:08,592 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 [2022-11-23 16:09:08,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:08,604 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 [2022-11-23 16:09:08,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:08,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 16:09:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:08,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:08,690 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 16:09:08,691 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 182 treesize of output 179 [2022-11-23 16:09:08,729 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 [2022-11-23 16:09:08,740 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 11 treesize of output 7 [2022-11-23 16:09:08,772 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 16:09:08,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2022-11-23 16:09:08,808 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 [2022-11-23 16:09:08,820 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:09,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '560#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:09,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:09,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:09,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 16:09:09,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341191662] [2022-11-23 16:09:09,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:09,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 16:09:09,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:09,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 16:09:09,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-23 16:09:09,164 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 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) [2022-11-23 16:09:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:09,312 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2022-11-23 16:09:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 16:09:09,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 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 26 [2022-11-23 16:09:09,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:09,314 INFO L225 Difference]: With dead ends: 68 [2022-11-23 16:09:09,314 INFO L226 Difference]: Without dead ends: 52 [2022-11-23 16:09:09,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-23 16:09:09,317 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:09,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:09:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-23 16:09:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-23 16:09:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-11-23 16:09:09,335 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2022-11-23 16:09:09,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:09,335 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-11-23 16:09:09,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 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) [2022-11-23 16:09:09,338 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-11-23 16:09:09,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 16:09:09,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:09,340 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:09,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:09,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:09,546 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:09,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:09,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1819707734, now seen corresponding path program 4 times [2022-11-23 16:09:09,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:09,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209912295] [2022-11-23 16:09:09,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:09,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 16:09:10,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:10,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209912295] [2022-11-23 16:09:10,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209912295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:10,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778233246] [2022-11-23 16:09:10,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:09:10,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:10,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:10,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:10,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 16:09:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:10,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 16:09:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 16:09:10,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 16:09:11,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778233246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:11,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1917772558] [2022-11-23 16:09:11,439 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:09:11,439 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:11,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:11,439 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:11,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:11,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:11,469 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:09:11,469 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 [2022-11-23 16:09:11,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:11,499 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:09:11,500 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 [2022-11-23 16:09:11,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:11,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 16:09:11,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:11,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:11,581 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 16:09:11,582 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 182 treesize of output 179 [2022-11-23 16:09:11,615 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 [2022-11-23 16:09:11,624 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 [2022-11-23 16:09:11,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2022-11-23 16:09:11,659 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 [2022-11-23 16:09:11,668 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:11,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1133#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:11,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:11,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:11,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-23 16:09:11,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626942026] [2022-11-23 16:09:11,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:11,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 16:09:11,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 16:09:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 16:09:11,838 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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) [2022-11-23 16:09:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:12,198 INFO L93 Difference]: Finished difference Result 128 states and 179 transitions. [2022-11-23 16:09:12,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 16:09:12,198 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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 50 [2022-11-23 16:09:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:12,202 INFO L225 Difference]: With dead ends: 128 [2022-11-23 16:09:12,203 INFO L226 Difference]: Without dead ends: 100 [2022-11-23 16:09:12,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 16:09:12,205 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:12,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:09:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-23 16:09:12,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-23 16:09:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 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) [2022-11-23 16:09:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-11-23 16:09:12,223 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2022-11-23 16:09:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:12,223 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-11-23 16:09:12,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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) [2022-11-23 16:09:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-11-23 16:09:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 16:09:12,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:12,226 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:12,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:12,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:12,436 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:12,437 INFO L85 PathProgramCache]: Analyzing trace with hash -164310230, now seen corresponding path program 5 times [2022-11-23 16:09:12,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:12,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608791033] [2022-11-23 16:09:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:12,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-23 16:09:14,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:14,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608791033] [2022-11-23 16:09:14,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608791033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:14,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021842236] [2022-11-23 16:09:14,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:09:14,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:14,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:14,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:14,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 16:12:51,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-23 16:12:51,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:12:52,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 16:12:52,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-23 16:12:52,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-23 16:12:55,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021842236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:55,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [640546412] [2022-11-23 16:12:55,217 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:12:55,217 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:12:55,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:12:55,218 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:12:55,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:12:55,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:55,242 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:12:55,242 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 [2022-11-23 16:12:55,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:55,265 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:12:55,266 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 [2022-11-23 16:12:55,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:55,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 16:12:55,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:55,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:55,330 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 16:12:55,331 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 182 treesize of output 179 [2022-11-23 16:12:55,361 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 [2022-11-23 16:12:55,370 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 [2022-11-23 16:12:55,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2022-11-23 16:12:55,406 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 [2022-11-23 16:12:55,414 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:12:55,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2258#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:12:55,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:12:55,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:12:55,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 97 [2022-11-23 16:12:55,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636281858] [2022-11-23 16:12:55,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:12:55,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-23 16:12:55,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:55,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-23 16:12:55,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2022-11-23 16:12:55,631 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 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) [2022-11-23 16:12:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:56,464 INFO L93 Difference]: Finished difference Result 248 states and 347 transitions. [2022-11-23 16:12:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-23 16:12:56,465 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 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 98 [2022-11-23 16:12:56,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:56,470 INFO L225 Difference]: With dead ends: 248 [2022-11-23 16:12:56,470 INFO L226 Difference]: Without dead ends: 196 [2022-11-23 16:12:56,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2022-11-23 16:12:56,474 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:56,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 16:12:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-23 16:12:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-11-23 16:12:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 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) [2022-11-23 16:12:56,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-11-23 16:12:56,504 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 98 [2022-11-23 16:12:56,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:56,505 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-11-23 16:12:56,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 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) [2022-11-23 16:12:56,505 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-11-23 16:12:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-23 16:12:56,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:56,508 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:56,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:56,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 16:12:56,729 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:56,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1059851306, now seen corresponding path program 6 times [2022-11-23 16:12:56,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:56,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067201077] [2022-11-23 16:12:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:56,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:13:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-23 16:13:04,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:13:04,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067201077] [2022-11-23 16:13:04,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067201077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:13:04,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791530496] [2022-11-23 16:13:04,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:13:04,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:04,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:13:04,363 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:13:04,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 16:13:04,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:13:04,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:13:04,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-23 16:13:04,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-23 16:13:05,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-23 16:13:15,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791530496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:13:15,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [431788559] [2022-11-23 16:13:15,895 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:13:15,895 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:13:15,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:13:15,896 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:13:15,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:13:15,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:15,923 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:13:15,924 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 [2022-11-23 16:13:15,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:15,948 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:13:15,951 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 [2022-11-23 16:13:15,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:15,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 16:13:16,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:16,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:16,013 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 16:13:16,014 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 182 treesize of output 179 [2022-11-23 16:13:16,045 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 [2022-11-23 16:13:16,055 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 [2022-11-23 16:13:16,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2022-11-23 16:13:16,089 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 [2022-11-23 16:13:16,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:13:16,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4487#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:13:16,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:13:16,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:13:16,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-23 16:13:16,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628507149] [2022-11-23 16:13:16,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:13:16,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-23 16:13:16,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:13:16,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-23 16:13:16,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2022-11-23 16:13:16,437 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 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) [2022-11-23 16:13:21,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:13:21,644 INFO L93 Difference]: Finished difference Result 488 states and 683 transitions. [2022-11-23 16:13:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-23 16:13:21,645 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 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 194 [2022-11-23 16:13:21,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:13:21,647 INFO L225 Difference]: With dead ends: 488 [2022-11-23 16:13:21,647 INFO L226 Difference]: Without dead ends: 388 [2022-11-23 16:13:21,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2022-11-23 16:13:21,652 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 1363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1363 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:13:21,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1363 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 16:13:21,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-23 16:13:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2022-11-23 16:13:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.0077519379844961) internal successors, (390), 387 states have internal predecessors, (390), 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) [2022-11-23 16:13:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 390 transitions. [2022-11-23 16:13:21,696 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 390 transitions. Word has length 194 [2022-11-23 16:13:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:13:21,696 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 390 transitions. [2022-11-23 16:13:21,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 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) [2022-11-23 16:13:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 390 transitions. [2022-11-23 16:13:21,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-11-23 16:13:21,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:13:21,705 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1] [2022-11-23 16:13:21,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 16:13:21,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:21,906 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:13:21,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:13:21,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2040299050, now seen corresponding path program 7 times [2022-11-23 16:13:21,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:13:21,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456835725] [2022-11-23 16:13:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:13:21,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:13:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:13:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-11-23 16:13:47,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:13:47,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456835725] [2022-11-23 16:13:47,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456835725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:13:47,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249973369] [2022-11-23 16:13:47,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:13:47,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:47,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:13:47,883 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:13:47,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 16:13:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:13:48,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-23 16:13:48,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-11-23 16:13:49,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-11-23 16:14:32,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249973369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:32,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [934362080] [2022-11-23 16:14:32,517 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 16:14:32,517 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:14:32,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:14:32,518 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:14:32,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:14:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:14:32,542 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:14:32,542 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 [2022-11-23 16:14:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:14:32,567 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:14:32,567 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 [2022-11-23 16:14:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:14:32,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 16:14:32,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:14:32,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:14:32,642 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 16:14:32,643 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 177 treesize of output 180 [2022-11-23 16:14:32,682 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 [2022-11-23 16:14:32,691 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 11 treesize of output 7 [2022-11-23 16:14:32,719 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 16:14:32,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2022-11-23 16:14:32,749 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 [2022-11-23 16:14:32,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:14:58,548 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8924#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:14:58,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:14:58,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:14:58,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-11-23 16:14:58,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052380799] [2022-11-23 16:14:58,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:14:58,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-11-23 16:14:58,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:14:58,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-11-23 16:14:58,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2022-11-23 16:14:58,581 INFO L87 Difference]: Start difference. First operand 388 states and 390 transitions. Second operand has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 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) [2022-11-23 16:15:58,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:15:58,583 INFO L93 Difference]: Finished difference Result 968 states and 1355 transitions. [2022-11-23 16:15:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-23 16:15:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 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 386 [2022-11-23 16:15:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:15:58,588 INFO L225 Difference]: With dead ends: 968 [2022-11-23 16:15:58,588 INFO L226 Difference]: Without dead ends: 772 [2022-11-23 16:15:58,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1348 GetRequests, 770 SyntacticMatches, 191 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112495 ImplicationChecksByTransitivity, 83.0s TimeCoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2022-11-23 16:15:58,597 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 2331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 3119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2331 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:15:58,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 3119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2331 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 16:15:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-11-23 16:15:58,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 772. [2022-11-23 16:15:58,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.0038910505836576) internal successors, (774), 771 states have internal predecessors, (774), 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) [2022-11-23 16:15:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 774 transitions. [2022-11-23 16:15:58,630 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 774 transitions. Word has length 386 [2022-11-23 16:15:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:15:58,631 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 774 transitions. [2022-11-23 16:15:58,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 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) [2022-11-23 16:15:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 774 transitions. [2022-11-23 16:15:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-11-23 16:15:58,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:15:58,655 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1] [2022-11-23 16:15:58,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 16:15:58,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:15:58,870 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:15:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:15:58,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1619354154, now seen corresponding path program 8 times [2022-11-23 16:15:58,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:15:58,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883822059] [2022-11-23 16:15:58,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:58,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:16:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:17:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 146306 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-23 16:17:48,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:17:48,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883822059] [2022-11-23 16:17:48,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883822059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:17:48,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126219213] [2022-11-23 16:17:48,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:17:48,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:17:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:17:48,236 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:17:48,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba0d8b3-5e07-453d-b7af-6a50bfd73302/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process