./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_04.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_04.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh --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 707ac1569fc13aaf70722a6e3f0da30ae8a39e673c650cb4b45c765a74a9f24d --- 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-2329fc7 [2022-12-14 06:42:32,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:42:32,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:42:32,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:42:32,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:42:32,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:42:32,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:42:32,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:42:32,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:42:32,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:42:32,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:42:32,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:42:32,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:42:32,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:42:32,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:42:32,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:42:32,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:42:32,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:42:32,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:42:32,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:42:32,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:42:32,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:42:32,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:42:32,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:42:32,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:42:32,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:42:32,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:42:32,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:42:32,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:42:32,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:42:32,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:42:32,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:42:32,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:42:32,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:42:32,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:42:32,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:42:32,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:42:32,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:42:32,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:42:32,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:42:32,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:42:32,106 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:42:32,125 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:42:32,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:42:32,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:42:32,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:42:32,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:42:32,126 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:42:32,126 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:42:32,127 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:42:32,127 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:42:32,127 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:42:32,127 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:42:32,127 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:42:32,127 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:42:32,128 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:42:32,128 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:42:32,128 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:42:32,128 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:42:32,128 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:42:32,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:42:32,129 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:42:32,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:42:32,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:42:32,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:42:32,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:42:32,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:42:32,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:42:32,130 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:42:32,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:42:32,131 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:42:32,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:42:32,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:42:32,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:42:32,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:42:32,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:42:32,132 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:42:32,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:42:32,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:42:32,132 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:42:32,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:42:32,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:42:32,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:42:32,133 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_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 707ac1569fc13aaf70722a6e3f0da30ae8a39e673c650cb4b45c765a74a9f24d [2022-12-14 06:42:32,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:42:32,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:42:32,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:42:32,339 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:42:32,339 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:42:32,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_two_index_04.i [2022-12-14 06:42:34,885 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:42:35,028 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:42:35,028 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/sv-benchmarks/c/array-examples/standard_two_index_04.i [2022-12-14 06:42:35,032 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/data/05b5a0ff7/7a2630d0f36e4462b9cf7e2e2b17d759/FLAG97f003150 [2022-12-14 06:42:35,451 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/data/05b5a0ff7/7a2630d0f36e4462b9cf7e2e2b17d759 [2022-12-14 06:42:35,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:42:35,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:42:35,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:42:35,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:42:35,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:42:35,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36138ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35, skipping insertion in model container [2022-12-14 06:42:35,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:42:35,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:42:35,566 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_be48a88b-7357-4745-be87-2a0a893b0cad/sv-benchmarks/c/array-examples/standard_two_index_04.i[814,827] [2022-12-14 06:42:35,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:42:35,581 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:42:35,589 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_be48a88b-7357-4745-be87-2a0a893b0cad/sv-benchmarks/c/array-examples/standard_two_index_04.i[814,827] [2022-12-14 06:42:35,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:42:35,603 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:42:35,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35 WrapperNode [2022-12-14 06:42:35,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:42:35,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:42:35,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:42:35,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:42:35,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,626 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-12-14 06:42:35,626 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:42:35,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:42:35,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:42:35,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:42:35,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,639 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:42:35,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:42:35,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:42:35,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:42:35,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35" (1/1) ... [2022-12-14 06:42:35,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:42:35,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:35,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:42:35,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:42:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:42:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:42:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 06:42:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:42:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:42:35,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:42:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:42:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:42:35,737 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:42:35,738 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:42:35,818 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:42:35,836 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:42:35,836 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 06:42:35,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:42:35 BoogieIcfgContainer [2022-12-14 06:42:35,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:42:35,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:42:35,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:42:35,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:42:35,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:42:35" (1/3) ... [2022-12-14 06:42:35,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d43a242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:42:35, skipping insertion in model container [2022-12-14 06:42:35,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:42:35" (2/3) ... [2022-12-14 06:42:35,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d43a242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:42:35, skipping insertion in model container [2022-12-14 06:42:35,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:42:35" (3/3) ... [2022-12-14 06:42:35,844 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.i [2022-12-14 06:42:35,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:42:35,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:42:35,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:42:35,898 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;@54b90cc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:42:35,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:42:35,901 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) [2022-12-14 06:42:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 06:42:35,906 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:35,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 06:42:35,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1747889330, now seen corresponding path program 1 times [2022-12-14 06:42:35,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:35,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707186298] [2022-12-14 06:42:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:35,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:42:36,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:36,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707186298] [2022-12-14 06:42:36,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707186298] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:42:36,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:42:36,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:42:36,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093216555] [2022-12-14 06:42:36,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:42:36,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:42:36,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:36,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:42:36,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:42:36,101 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) [2022-12-14 06:42:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:36,132 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-12-14 06:42:36,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:42:36,134 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 [2022-12-14 06:42:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:36,140 INFO L225 Difference]: With dead ends: 17 [2022-12-14 06:42:36,140 INFO L226 Difference]: Without dead ends: 9 [2022-12-14 06:42:36,142 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 [2022-12-14 06:42:36,145 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:36,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:42:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-12-14 06:42:36,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-12-14 06:42:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:42:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-12-14 06:42:36,169 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-12-14 06:42:36,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:36,170 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-12-14 06:42:36,170 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) [2022-12-14 06:42:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-12-14 06:42:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 06:42:36,170 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:36,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:36,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:42:36,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash 274671409, now seen corresponding path program 1 times [2022-12-14 06:42:36,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:36,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877401305] [2022-12-14 06:42:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:36,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:42:36,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:36,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877401305] [2022-12-14 06:42:36,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877401305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863086376] [2022-12-14 06:42:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:36,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:36,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:36,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:36,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:42:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:36,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:42:36,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:42:36,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:42:36,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863086376] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:42:36,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:42:36,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-14 06:42:36,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718437347] [2022-12-14 06:42:36,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:42:36,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:42:36,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:36,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:42:36,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:42:36,321 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:42:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:36,341 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-12-14 06:42:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:42:36,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 06:42:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:36,342 INFO L225 Difference]: With dead ends: 20 [2022-12-14 06:42:36,342 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 06:42:36,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:42:36,343 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:36,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:42:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 06:42:36,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-12-14 06:42:36,346 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) [2022-12-14 06:42:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 06:42:36,347 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-12-14 06:42:36,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:36,347 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 06:42:36,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:42:36,347 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 06:42:36,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 06:42:36,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:36,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:36,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:42:36,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 06:42:36,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:36,552 INFO L85 PathProgramCache]: Analyzing trace with hash -108579109, now seen corresponding path program 1 times [2022-12-14 06:42:36,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:36,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200780565] [2022-12-14 06:42:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:36,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:42:36,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:36,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200780565] [2022-12-14 06:42:36,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200780565] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:36,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469922677] [2022-12-14 06:42:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:36,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:36,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:36,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:36,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:42:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:36,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:42:36,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:42:36,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:42:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:42:36,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469922677] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:42:36,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [757732319] [2022-12-14 06:42:36,837 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 06:42:36,837 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:42:36,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:42:36,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:42:36,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:42:36,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:36,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:36,933 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 06:42:36,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 06:42:36,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:36,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:36,979 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 06:42:36,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 06:42:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:37,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 06:42:37,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:37,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:42:37,128 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 06:42:37,129 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 248 treesize of output 247 [2022-12-14 06:42:37,243 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 [2022-12-14 06:42:37,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:37,256 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 17 treesize of output 17 [2022-12-14 06:42:37,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:37,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:37,323 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-12-14 06:42:37,324 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 6 case distinctions, treesize of input 78 treesize of output 103 [2022-12-14 06:42:37,393 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 06:42:37,393 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 25 treesize of output 25 [2022-12-14 06:42:37,405 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:42:37,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:42:37,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:42:37,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:42:37,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 06:42:37,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157110320] [2022-12-14 06:42:37,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:42:37,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:42:37,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:37,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:42:37,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:42:37,512 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) [2022-12-14 06:42:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:37,537 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-12-14 06:42:37,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:42:37,537 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 [2022-12-14 06:42:37,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:37,538 INFO L225 Difference]: With dead ends: 31 [2022-12-14 06:42:37,538 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 06:42:37,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:42:37,539 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:37,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:42:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 06:42:37,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-12-14 06:42:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:42:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-12-14 06:42:37,542 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-12-14 06:42:37,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:37,542 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-12-14 06:42:37,543 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) [2022-12-14 06:42:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-12-14 06:42:37,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 06:42:37,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:37,543 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:37,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:42:37,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:37,745 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:37,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1284839922, now seen corresponding path program 2 times [2022-12-14 06:42:37,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:37,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043363365] [2022-12-14 06:42:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:37,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:42:37,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:37,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043363365] [2022-12-14 06:42:37,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043363365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:37,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894720804] [2022-12-14 06:42:37,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:42:37,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:37,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:37,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:37,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:42:37,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 06:42:37,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:42:37,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:42:37,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:42:38,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:42:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:42:38,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894720804] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:42:38,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [410346589] [2022-12-14 06:42:38,033 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 06:42:38,033 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:42:38,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:42:38,033 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:42:38,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:42:38,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:38,074 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 06:42:38,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 06:42:38,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:38,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:38,115 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 06:42:38,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 06:42:38,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:38,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 06:42:38,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:38,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:42:38,205 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 06:42:38,206 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 248 treesize of output 247 [2022-12-14 06:42:38,285 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 [2022-12-14 06:42:38,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:38,298 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 17 treesize of output 17 [2022-12-14 06:42:38,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:38,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:38,356 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-12-14 06:42:38,356 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 6 case distinctions, treesize of input 78 treesize of output 103 [2022-12-14 06:42:38,456 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 06:42:38,456 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 25 treesize of output 25 [2022-12-14 06:42:38,465 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:42:38,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '312#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:42:38,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:42:38,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:42:38,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-14 06:42:38,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082162093] [2022-12-14 06:42:38,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:42:38,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:42:38,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:38,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:42:38,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-12-14 06:42:38,562 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:42:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:38,609 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-12-14 06:42:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:42:38,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 06:42:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:38,610 INFO L225 Difference]: With dead ends: 54 [2022-12-14 06:42:38,610 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 06:42:38,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-12-14 06:42:38,611 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:38,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:42:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 06:42:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2022-12-14 06:42:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:42:38,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-14 06:42:38,616 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-12-14 06:42:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:38,616 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-14 06:42:38,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:42:38,617 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-14 06:42:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 06:42:38,617 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:38,617 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:38,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:42:38,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:38,819 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash 376721006, now seen corresponding path program 3 times [2022-12-14 06:42:38,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:38,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867216261] [2022-12-14 06:42:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:38,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:42:39,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:39,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867216261] [2022-12-14 06:42:39,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867216261] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:39,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353828837] [2022-12-14 06:42:39,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:42:39,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:39,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:39,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:39,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:42:39,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:42:39,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:42:39,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 06:42:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:42:39,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:42:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:42:39,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353828837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:42:39,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [995146378] [2022-12-14 06:42:39,238 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 06:42:39,238 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:42:39,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:42:39,238 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:42:39,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:42:39,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:39,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:39,272 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 06:42:39,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 06:42:39,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:39,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:39,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 06:42:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:39,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 06:42:39,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:39,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:39,373 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 06:42:39,374 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 258 treesize of output 246 [2022-12-14 06:42:39,425 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 [2022-12-14 06:42:39,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:39,448 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 25 treesize of output 25 [2022-12-14 06:42:39,503 INFO L321 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-12-14 06:42:39,504 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 86 treesize of output 108 [2022-12-14 06:42:39,548 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 06:42:39,548 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 25 treesize of output 25 [2022-12-14 06:42:39,560 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:42:39,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '555#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:42:39,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:42:39,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:42:39,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-12-14 06:42:39,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503140127] [2022-12-14 06:42:39,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:42:39,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 06:42:39,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:39,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 06:42:39,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2022-12-14 06:42:39,685 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 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) [2022-12-14 06:42:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:39,771 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-12-14 06:42:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 06:42:39,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 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 18 [2022-12-14 06:42:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:39,772 INFO L225 Difference]: With dead ends: 93 [2022-12-14 06:42:39,772 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 06:42:39,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2022-12-14 06:42:39,773 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 83 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:39,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 48 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:42:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 06:42:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 36. [2022-12-14 06:42:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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) [2022-12-14 06:42:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-12-14 06:42:39,777 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2022-12-14 06:42:39,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:39,777 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-12-14 06:42:39,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 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) [2022-12-14 06:42:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-12-14 06:42:39,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 06:42:39,778 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:39,778 INFO L195 NwaCegarLoop]: trace histogram [19, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:39,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:42:39,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:39,979 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1462949573, now seen corresponding path program 4 times [2022-12-14 06:42:39,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:39,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136892051] [2022-12-14 06:42:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:39,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-14 06:42:40,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:40,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136892051] [2022-12-14 06:42:40,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136892051] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:40,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345589490] [2022-12-14 06:42:40,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:42:40,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:40,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:40,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:40,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:42:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:40,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 06:42:40,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 06:42:40,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:42:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 06:42:40,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345589490] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:42:40,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [81323706] [2022-12-14 06:42:40,629 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 06:42:40,629 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:42:40,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:42:40,629 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:42:40,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:42:40,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:40,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:40,654 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 06:42:40,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 06:42:40,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:40,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:40,681 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 06:42:40,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 06:42:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:40,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 06:42:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:40,767 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 06:42:40,768 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 258 treesize of output 246 [2022-12-14 06:42:40,817 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 [2022-12-14 06:42:40,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:40,835 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 17 treesize of output 17 [2022-12-14 06:42:40,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:40,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:40,890 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-12-14 06:42:40,890 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 6 case distinctions, treesize of input 78 treesize of output 103 [2022-12-14 06:42:40,955 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 06:42:40,955 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 25 treesize of output 25 [2022-12-14 06:42:40,965 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:42:41,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1014#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:42:41,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:42:41,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:42:41,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 21] total 48 [2022-12-14 06:42:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274761719] [2022-12-14 06:42:41,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:42:41,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 06:42:41,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 06:42:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1475, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 06:42:41,094 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 48 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 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) [2022-12-14 06:42:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:41,256 INFO L93 Difference]: Finished difference Result 158 states and 193 transitions. [2022-12-14 06:42:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 06:42:41,257 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 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 34 [2022-12-14 06:42:41,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:41,258 INFO L225 Difference]: With dead ends: 158 [2022-12-14 06:42:41,258 INFO L226 Difference]: Without dead ends: 143 [2022-12-14 06:42:41,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1281, Invalid=1475, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 06:42:41,260 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 195 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:41,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 84 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:42:41,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-14 06:42:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 68. [2022-12-14 06:42:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 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) [2022-12-14 06:42:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-12-14 06:42:41,266 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 34 [2022-12-14 06:42:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:41,266 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-12-14 06:42:41,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 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) [2022-12-14 06:42:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-12-14 06:42:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 06:42:41,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:41,267 INFO L195 NwaCegarLoop]: trace histogram [45, 15, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:41,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:42:41,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:41,469 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:41,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:41,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1022184869, now seen corresponding path program 5 times [2022-12-14 06:42:41,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:41,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330434327] [2022-12-14 06:42:41,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:41,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-12-14 06:42:41,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:41,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330434327] [2022-12-14 06:42:41,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330434327] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:41,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982033247] [2022-12-14 06:42:41,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:42:41,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:41,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:41,964 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:41,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:42:46,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 06:42:46,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:42:46,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 06:42:46,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-12-14 06:42:46,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:42:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-12-14 06:42:47,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982033247] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:42:47,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1647393320] [2022-12-14 06:42:47,120 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 06:42:47,120 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:42:47,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:42:47,120 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:42:47,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:42:47,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:47,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:47,160 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 06:42:47,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 06:42:47,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:47,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:47,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 06:42:47,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:47,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 06:42:47,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:47,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:42:47,240 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 06:42:47,240 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 248 treesize of output 247 [2022-12-14 06:42:47,296 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 [2022-12-14 06:42:47,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:47,307 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 20 treesize of output 20 [2022-12-14 06:42:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:47,351 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-12-14 06:42:47,351 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 5 case distinctions, treesize of input 81 treesize of output 109 [2022-12-14 06:42:47,410 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 06:42:47,410 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 25 treesize of output 25 [2022-12-14 06:42:47,418 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:42:47,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1822#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:42:47,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:42:47,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:42:47,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-12-14 06:42:47,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445456342] [2022-12-14 06:42:47,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:42:47,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 06:42:47,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 06:42:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=713, Invalid=847, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 06:42:47,519 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:42:47,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:47,723 INFO L93 Difference]: Finished difference Result 246 states and 265 transitions. [2022-12-14 06:42:47,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 06:42:47,723 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-12-14 06:42:47,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:47,724 INFO L225 Difference]: With dead ends: 246 [2022-12-14 06:42:47,724 INFO L226 Difference]: Without dead ends: 241 [2022-12-14 06:42:47,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=713, Invalid=847, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 06:42:47,725 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 436 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:47,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 96 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:42:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-12-14 06:42:47,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 85. [2022-12-14 06:42:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 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) [2022-12-14 06:42:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-12-14 06:42:47,734 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 66 [2022-12-14 06:42:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:47,734 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-12-14 06:42:47,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:42:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-12-14 06:42:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 06:42:47,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:47,736 INFO L195 NwaCegarLoop]: trace histogram [45, 32, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:47,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:42:47,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:47,938 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:47,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:47,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1816102159, now seen corresponding path program 6 times [2022-12-14 06:42:47,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:47,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904293557] [2022-12-14 06:42:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:47,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-12-14 06:42:48,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:48,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904293557] [2022-12-14 06:42:48,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904293557] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:48,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230917012] [2022-12-14 06:42:48,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:42:48,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:48,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:48,827 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:48,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:42:48,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:42:48,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:42:48,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 06:42:48,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-12-14 06:42:49,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:42:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-12-14 06:42:50,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230917012] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:42:50,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295479082] [2022-12-14 06:42:50,549 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 06:42:50,549 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:42:50,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:42:50,549 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:42:50,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:42:50,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:50,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:50,579 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 06:42:50,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 06:42:50,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:50,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:50,615 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 06:42:50,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 06:42:50,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:50,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 06:42:50,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:50,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:42:50,686 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 06:42:50,686 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 248 treesize of output 247 [2022-12-14 06:42:50,742 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 [2022-12-14 06:42:50,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:42:50,752 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 25 treesize of output 25 [2022-12-14 06:42:50,791 INFO L321 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-12-14 06:42:50,791 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 86 treesize of output 108 [2022-12-14 06:42:50,820 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 06:42:50,821 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 25 treesize of output 25 [2022-12-14 06:42:50,828 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:42:50,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2959#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:42:50,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:42:50,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:42:50,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 47, 47] total 116 [2022-12-14 06:42:50,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586179326] [2022-12-14 06:42:50,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:42:50,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-12-14 06:42:50,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:42:50,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-12-14 06:42:50,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7027, Invalid=7493, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 06:42:50,917 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 116 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 116 states have internal predecessors, (135), 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) [2022-12-14 06:42:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:51,861 INFO L93 Difference]: Finished difference Result 429 states and 513 transitions. [2022-12-14 06:42:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-12-14 06:42:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 116 states have internal predecessors, (135), 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 83 [2022-12-14 06:42:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:51,862 INFO L225 Difference]: With dead ends: 429 [2022-12-14 06:42:51,863 INFO L226 Difference]: Without dead ends: 391 [2022-12-14 06:42:51,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7229 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=7027, Invalid=7493, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 06:42:51,866 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 999 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:51,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 207 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:42:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-12-14 06:42:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 166. [2022-12-14 06:42:51,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.018181818181818) internal successors, (168), 165 states have internal predecessors, (168), 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) [2022-12-14 06:42:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2022-12-14 06:42:51,881 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 83 [2022-12-14 06:42:51,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:42:51,881 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2022-12-14 06:42:51,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 116 states have internal predecessors, (135), 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) [2022-12-14 06:42:51,882 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2022-12-14 06:42:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 06:42:51,884 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:42:51,884 INFO L195 NwaCegarLoop]: trace histogram [113, 45, 1, 1, 1, 1, 1, 1] [2022-12-14 06:42:51,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:42:52,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 06:42:52,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:42:52,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:42:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1347475547, now seen corresponding path program 7 times [2022-12-14 06:42:52,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:42:52,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331515694] [2022-12-14 06:42:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:42:52,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:42:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7476 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 6441 trivial. 0 not checked. [2022-12-14 06:42:53,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:42:53,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331515694] [2022-12-14 06:42:53,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331515694] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:42:53,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217904332] [2022-12-14 06:42:53,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:42:53,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:42:53,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:42:53,855 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:42:53,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:42:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:42:54,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 115 conjunts are in the unsatisfiable core [2022-12-14 06:42:54,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:42:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7476 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-12-14 06:42:54,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:43:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7476 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-12-14 06:43:00,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217904332] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:43:00,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1473494532] [2022-12-14 06:43:00,133 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 06:43:00,133 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:43:00,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:43:00,133 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:43:00,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:43:00,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:43:00,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:43:00,162 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 06:43:00,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 06:43:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:43:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:43:00,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 06:43:00,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:43:00,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 06:43:00,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:43:00,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:43:00,241 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 06:43:00,241 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 248 treesize of output 247 [2022-12-14 06:43:00,294 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 [2022-12-14 06:43:00,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:43:00,302 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 22 treesize of output 22 [2022-12-14 06:43:00,344 INFO L321 Elim1Store]: treesize reduction 120, result has 23.1 percent of original size [2022-12-14 06:43:00,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 102 [2022-12-14 06:43:00,371 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 06:43:00,371 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 25 treesize of output 25 [2022-12-14 06:43:00,378 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:43:00,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5186#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:43:00,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:43:00,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:43:00,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 115, 115] total 248 [2022-12-14 06:43:00,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960817181] [2022-12-14 06:43:00,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:43:00,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 248 states [2022-12-14 06:43:00,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:00,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2022-12-14 06:43:00,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31381, Invalid=32375, Unknown=0, NotChecked=0, Total=63756 [2022-12-14 06:43:00,493 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 248 states, 248 states have (on average 1.1451612903225807) internal successors, (284), 248 states have internal predecessors, (284), 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) [2022-12-14 06:43:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:06,809 INFO L93 Difference]: Finished difference Result 754 states and 919 transitions. [2022-12-14 06:43:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2022-12-14 06:43:06,810 INFO L78 Accepts]: Start accepts. Automaton has has 248 states, 248 states have (on average 1.1451612903225807) internal successors, (284), 248 states have internal predecessors, (284), 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 164 [2022-12-14 06:43:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:06,811 INFO L225 Difference]: With dead ends: 754 [2022-12-14 06:43:06,811 INFO L226 Difference]: Without dead ends: 703 [2022-12-14 06:43:06,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34389 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=31381, Invalid=32375, Unknown=0, NotChecked=0, Total=63756 [2022-12-14 06:43:06,815 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1363 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:06,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1363 Valid, 390 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:43:06,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-12-14 06:43:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 328. [2022-12-14 06:43:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.0091743119266054) internal successors, (330), 327 states have internal predecessors, (330), 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) [2022-12-14 06:43:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 330 transitions. [2022-12-14 06:43:06,827 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 330 transitions. Word has length 164 [2022-12-14 06:43:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:06,827 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 330 transitions. [2022-12-14 06:43:06,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 248 states, 248 states have (on average 1.1451612903225807) internal successors, (284), 248 states have internal predecessors, (284), 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) [2022-12-14 06:43:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 330 transitions. [2022-12-14 06:43:06,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-12-14 06:43:06,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:06,831 INFO L195 NwaCegarLoop]: trace histogram [245, 75, 1, 1, 1, 1, 1, 1] [2022-12-14 06:43:06,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 06:43:07,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:07,033 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:07,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:07,034 INFO L85 PathProgramCache]: Analyzing trace with hash 516708955, now seen corresponding path program 8 times [2022-12-14 06:43:07,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:07,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962644648] [2022-12-14 06:43:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:07,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 32985 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 30135 trivial. 0 not checked. [2022-12-14 06:43:11,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:11,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962644648] [2022-12-14 06:43:11,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962644648] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:43:11,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014209865] [2022-12-14 06:43:11,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:43:11,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:11,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:43:11,463 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:43:11,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be48a88b-7357-4745-be87-2a0a893b0cad/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process