./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init2_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/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_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init2_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/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_69205c8e-c5dd-4a15-bbec-0974a16155e6/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 cf1af1de3644d7f65779e1f0fa1695f30c94933219211c16e44b2dad6d7664ff --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 16:08:18,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 16:08:18,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 16:08:18,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 16:08:18,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 16:08:18,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 16:08:18,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 16:08:18,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 16:08:18,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 16:08:18,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 16:08:18,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 16:08:18,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 16:08:18,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 16:08:18,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 16:08:18,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 16:08:18,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 16:08:18,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 16:08:18,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 16:08:18,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 16:08:18,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 16:08:18,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 16:08:18,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 16:08:18,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 16:08:18,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 16:08:18,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 16:08:18,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 16:08:18,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 16:08:18,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 16:08:18,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 16:08:18,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 16:08:18,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 16:08:18,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 16:08:18,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 16:08:18,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 16:08:18,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 16:08:18,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 16:08:18,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 16:08:18,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 16:08:18,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 16:08:18,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 16:08:18,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 16:08:18,942 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 16:08:18,964 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 16:08:18,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 16:08:18,964 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 16:08:18,965 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 16:08:18,965 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 16:08:18,965 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 16:08:18,966 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 16:08:18,966 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 16:08:18,966 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 16:08:18,966 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 16:08:18,967 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 16:08:18,967 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 16:08:18,967 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 16:08:18,967 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 16:08:18,967 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 16:08:18,968 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 16:08:18,968 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 16:08:18,968 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 16:08:18,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 16:08:18,969 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 16:08:18,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 16:08:18,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 16:08:18,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 16:08:18,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 16:08:18,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 16:08:18,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 16:08:18,970 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 16:08:18,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 16:08:18,971 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 16:08:18,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 16:08:18,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 16:08:18,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 16:08:18,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:08:18,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 16:08:18,972 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 16:08:18,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 16:08:18,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 16:08:18,972 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 16:08:18,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 16:08:18,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 16:08:18,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 16:08:18,973 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_69205c8e-c5dd-4a15-bbec-0974a16155e6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf1af1de3644d7f65779e1f0fa1695f30c94933219211c16e44b2dad6d7664ff [2022-12-14 16:08:19,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 16:08:19,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 16:08:19,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 16:08:19,176 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 16:08:19,176 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 16:08:19,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_init2_ground-1.i [2022-12-14 16:08:21,651 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 16:08:21,817 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 16:08:21,817 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/sv-benchmarks/c/array-examples/standard_init2_ground-1.i [2022-12-14 16:08:21,822 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/data/26c954569/68107dce5b884e9d89f71d4ae412205d/FLAG13967878a [2022-12-14 16:08:22,230 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/data/26c954569/68107dce5b884e9d89f71d4ae412205d [2022-12-14 16:08:22,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 16:08:22,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 16:08:22,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 16:08:22,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 16:08:22,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 16:08:22,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@553c5125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22, skipping insertion in model container [2022-12-14 16:08:22,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 16:08:22,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 16:08:22,373 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_69205c8e-c5dd-4a15-bbec-0974a16155e6/sv-benchmarks/c/array-examples/standard_init2_ground-1.i[816,829] [2022-12-14 16:08:22,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:08:22,394 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 16:08:22,405 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_69205c8e-c5dd-4a15-bbec-0974a16155e6/sv-benchmarks/c/array-examples/standard_init2_ground-1.i[816,829] [2022-12-14 16:08:22,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:08:22,423 INFO L208 MainTranslator]: Completed translation [2022-12-14 16:08:22,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22 WrapperNode [2022-12-14 16:08:22,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 16:08:22,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 16:08:22,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 16:08:22,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 16:08:22,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,452 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-12-14 16:08:22,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 16:08:22,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 16:08:22,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 16:08:22,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 16:08:22,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,466 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 16:08:22,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 16:08:22,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 16:08:22,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 16:08:22,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22" (1/1) ... [2022-12-14 16:08:22,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:08:22,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:08:22,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 16:08:22,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 16:08:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 16:08:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 16:08:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 16:08:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 16:08:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 16:08:22,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 16:08:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 16:08:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 16:08:22,576 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 16:08:22,578 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 16:08:22,673 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 16:08:22,695 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 16:08:22,695 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 16:08:22,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:08:22 BoogieIcfgContainer [2022-12-14 16:08:22,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 16:08:22,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 16:08:22,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 16:08:22,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 16:08:22,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:08:22" (1/3) ... [2022-12-14 16:08:22,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d05766e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:08:22, skipping insertion in model container [2022-12-14 16:08:22,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:22" (2/3) ... [2022-12-14 16:08:22,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d05766e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:08:22, skipping insertion in model container [2022-12-14 16:08:22,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:08:22" (3/3) ... [2022-12-14 16:08:22,707 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-1.i [2022-12-14 16:08:22,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 16:08:22,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 16:08:22,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 16:08:22,771 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;@385c477e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 16:08:22,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 16:08:22,774 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 16:08:22,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 16:08:22,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:08:22,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 16:08:22,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:08:22,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:08:22,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1717294966, now seen corresponding path program 1 times [2022-12-14 16:08:22,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:08:22,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619742868] [2022-12-14 16:08:22,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:08:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:08:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:08:22,937 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 16:08:22,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:08:22,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619742868] [2022-12-14 16:08:22,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619742868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:08:22,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:08:22,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:08:22,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814001709] [2022-12-14 16:08:22,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:08:22,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:08:22,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:08:22,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:08:22,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:08:22,970 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 16:08:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:08:22,998 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-12-14 16:08:23,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:08:23,001 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 16:08:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:08:23,008 INFO L225 Difference]: With dead ends: 18 [2022-12-14 16:08:23,008 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 16:08:23,011 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 16:08:23,015 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:08:23,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:08:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 16:08:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 16:08:23,037 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 16:08:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 16:08:23,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-12-14 16:08:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:08:23,039 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 16:08:23,039 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 16:08:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 16:08:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 16:08:23,040 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:08:23,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:08:23,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 16:08:23,040 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:08:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:08:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1691607699, now seen corresponding path program 1 times [2022-12-14 16:08:23,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:08:23,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307821533] [2022-12-14 16:08:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:08:23,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:08:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:08:23,104 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 16:08:23,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:08:23,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307821533] [2022-12-14 16:08:23,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307821533] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:08:23,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931085991] [2022-12-14 16:08:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:08:23,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:08:23,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:08:23,106 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:08:23,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 16:08:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:08:23,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:08:23,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:08:23,192 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 16:08:23,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:08:23,209 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 16:08:23,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931085991] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:08:23,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1660659310] [2022-12-14 16:08:23,224 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 16:08:23,224 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:08:23,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:08:23,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:08:23,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:08:23,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:23,299 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 16:08:23,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 16:08:23,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:23,330 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 16:08:23,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 16:08:23,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:23,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 16:08:23,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:23,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 16:08:23,447 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 16:08:23,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 177 treesize of output 180 [2022-12-14 16:08:23,499 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 16:08:23,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:08:23,534 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 16:08:23,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2022-12-14 16:08:23,562 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 16:08:23,573 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:08:23,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:08:23,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:08:23,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:08:23,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 16:08:23,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917871129] [2022-12-14 16:08:23,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:08:23,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 16:08:23,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:08:23,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 16:08:23,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 16:08:23,656 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 16:08:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:08:23,684 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-12-14 16:08:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 16:08:23,684 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 16:08:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:08:23,685 INFO L225 Difference]: With dead ends: 23 [2022-12-14 16:08:23,685 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 16:08:23,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 16:08:23,686 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:08:23,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:08:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 16:08:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 16:08:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:08:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-12-14 16:08:23,691 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-12-14 16:08:23,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:08:23,692 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-12-14 16:08:23,692 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 16:08:23,692 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-12-14 16:08:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 16:08:23,692 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:08:23,692 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 16:08:23,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 16:08:23,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:08:23,893 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:08:23,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:08:23,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1323371850, now seen corresponding path program 2 times [2022-12-14 16:08:23,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:08:23,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062338261] [2022-12-14 16:08:23,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:08:23,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:08:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:08:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 16:08:24,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:08:24,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062338261] [2022-12-14 16:08:24,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062338261] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:08:24,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333280997] [2022-12-14 16:08:24,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:08:24,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:08:24,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:08:24,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:08:24,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 16:08:24,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 16:08:24,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:08:24,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 16:08:24,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:08:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 16:08:24,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:08:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 16:08:24,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333280997] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:08:24,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560485754] [2022-12-14 16:08:24,143 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 16:08:24,143 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:08:24,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:08:24,143 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:08:24,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:08:24,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:24,165 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 16:08:24,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 16:08:24,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:24,188 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 16:08:24,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 16:08:24,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:24,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 16:08:24,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:24,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 16:08:24,256 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 16:08:24,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 177 treesize of output 180 [2022-12-14 16:08:24,286 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 16:08:24,296 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 16:08:24,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2022-12-14 16:08:24,328 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 16:08:24,338 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:08:24,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '263#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:08:24,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:08:24,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:08:24,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 16:08:24,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468107832] [2022-12-14 16:08:24,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:08:24,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 16:08:24,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:08:24,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 16:08:24,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-12-14 16:08:24,411 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:08:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:08:24,454 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-12-14 16:08:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 16:08:24,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 16:08:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:08:24,455 INFO L225 Difference]: With dead ends: 38 [2022-12-14 16:08:24,455 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 16:08:24,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-12-14 16:08:24,456 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:08:24,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:08:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 16:08:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-14 16:08:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:08:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-12-14 16:08:24,462 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2022-12-14 16:08:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:08:24,462 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-12-14 16:08:24,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:08:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-12-14 16:08:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 16:08:24,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:08:24,463 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 16:08:24,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 16:08:24,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:08:24,665 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:08:24,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:08:24,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1463801962, now seen corresponding path program 3 times [2022-12-14 16:08:24,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:08:24,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006194322] [2022-12-14 16:08:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:08:24,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:08:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:08:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:08:24,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:08:24,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006194322] [2022-12-14 16:08:24,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006194322] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:08:24,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675304140] [2022-12-14 16:08:24,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:08:24,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:08:24,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:08:24,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:08:24,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 16:08:25,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:08:25,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:08:25,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 16:08:25,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:08:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:08:25,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:08:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:08:25,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675304140] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:08:25,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1683386150] [2022-12-14 16:08:25,216 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 16:08:25,216 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:08:25,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:08:25,216 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:08:25,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:08:25,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:25,237 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 16:08:25,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 16:08:25,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:25,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 16:08:25,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:25,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 16:08:25,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:25,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:25,309 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 16:08:25,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 179 [2022-12-14 16:08:25,335 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 16:08:25,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:08:25,365 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 16:08:25,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2022-12-14 16:08:25,400 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 16:08:25,421 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:08:25,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '560#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:08:25,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:08:25,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:08:25,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 16:08:25,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174950670] [2022-12-14 16:08:25,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:08:25,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 16:08:25,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:08:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 16:08:25,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-12-14 16:08:25,638 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:08:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:08:25,733 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2022-12-14 16:08:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 16:08:25,733 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 16:08:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:08:25,734 INFO L225 Difference]: With dead ends: 68 [2022-12-14 16:08:25,734 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 16:08:25,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-12-14 16:08:25,736 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:08:25,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:08:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 16:08:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-12-14 16:08:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:08:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-12-14 16:08:25,744 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2022-12-14 16:08:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:08:25,745 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-12-14 16:08:25,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:08:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-12-14 16:08:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 16:08:25,746 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:08:25,746 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-12-14 16:08:25,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 16:08:25,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:08:25,947 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:08:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:08:25,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1819707734, now seen corresponding path program 4 times [2022-12-14 16:08:25,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:08:25,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304292923] [2022-12-14 16:08:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:08:25,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:08:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:08:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 16:08:26,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:08:26,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304292923] [2022-12-14 16:08:26,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304292923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:08:26,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884496363] [2022-12-14 16:08:26,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 16:08:26,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:08:26,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:08:26,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:08:26,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 16:08:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:08:26,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 16:08:26,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:08:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 16:08:26,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:08:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 16:08:27,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884496363] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:08:27,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2112366472] [2022-12-14 16:08:27,043 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 16:08:27,043 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:08:27,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:08:27,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:08:27,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:08:27,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:27,061 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 16:08:27,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 16:08:27,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:27,078 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 16:08:27,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 16:08:27,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:27,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 16:08:27,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:08:27,132 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 16:08:27,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 179 [2022-12-14 16:08:27,152 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 16:08:27,158 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 16:08:27,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2022-12-14 16:08:27,181 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 16:08:27,188 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:08:27,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1133#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:08:27,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:08:27,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:08:27,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-14 16:08:27,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388652152] [2022-12-14 16:08:27,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:08:27,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 16:08:27,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:08:27,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 16:08:27,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 16:08:27,285 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:08:27,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:08:27,457 INFO L93 Difference]: Finished difference Result 128 states and 179 transitions. [2022-12-14 16:08:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 16:08:27,458 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-14 16:08:27,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:08:27,459 INFO L225 Difference]: With dead ends: 128 [2022-12-14 16:08:27,459 INFO L226 Difference]: Without dead ends: 100 [2022-12-14 16:08:27,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 16:08:27,460 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:08:27,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:08:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-14 16:08:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-12-14 16:08:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:08:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-12-14 16:08:27,472 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2022-12-14 16:08:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:08:27,472 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-12-14 16:08:27,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:08:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-12-14 16:08:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 16:08:27,474 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:08:27,474 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-12-14 16:08:27,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 16:08:27,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:08:27,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:08:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:08:27,678 INFO L85 PathProgramCache]: Analyzing trace with hash -164310230, now seen corresponding path program 5 times [2022-12-14 16:08:27,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:08:27,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101477172] [2022-12-14 16:08:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:08:27,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:08:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:08:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 16:08:29,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:08:29,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101477172] [2022-12-14 16:08:29,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101477172] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:08:29,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390201276] [2022-12-14 16:08:29,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:08:29,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:08:29,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:08:29,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:08:29,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 16:11:23,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-12-14 16:11:23,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:11:23,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 16:11:23,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:11:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 16:11:23,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:11:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 16:11:24,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390201276] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:11:24,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1422113089] [2022-12-14 16:11:24,915 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 16:11:24,915 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:11:24,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:11:24,915 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:11:24,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:11:24,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:11:24,930 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 16:11:24,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 16:11:24,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:11:24,945 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 16:11:24,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 16:11:24,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:11:24,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 16:11:24,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:11:24,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:11:24,986 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 16:11:24,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 179 [2022-12-14 16:11:25,004 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 16:11:25,009 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 16:11:25,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2022-12-14 16:11:25,035 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 16:11:25,041 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:11:25,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2258#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:11:25,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:11:25,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:11:25,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 97 [2022-12-14 16:11:25,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863033521] [2022-12-14 16:11:25,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:11:25,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 16:11:25,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:25,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 16:11:25,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 16:11:25,203 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:25,667 INFO L93 Difference]: Finished difference Result 248 states and 347 transitions. [2022-12-14 16:11:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 16:11:25,667 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-12-14 16:11:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:25,668 INFO L225 Difference]: With dead ends: 248 [2022-12-14 16:11:25,668 INFO L226 Difference]: Without dead ends: 196 [2022-12-14 16:11:25,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 16:11:25,670 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:25,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 16:11:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-14 16:11:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-12-14 16:11:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-12-14 16:11:25,680 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 98 [2022-12-14 16:11:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:25,680 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-12-14 16:11:25,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-12-14 16:11:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-12-14 16:11:25,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:25,682 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:25,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 16:11:25,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:11:25,884 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1059851306, now seen corresponding path program 6 times [2022-12-14 16:11:25,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:25,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432930334] [2022-12-14 16:11:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:25,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-12-14 16:11:30,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:30,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432930334] [2022-12-14 16:11:30,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432930334] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:11:30,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575128293] [2022-12-14 16:11:30,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:11:30,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:11:30,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:11:30,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:11:30,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 16:11:30,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:11:30,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:11:30,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 16:11:30,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:11:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-12-14 16:11:30,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:11:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-12-14 16:11:36,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575128293] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:11:36,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1151992403] [2022-12-14 16:11:36,478 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 16:11:36,478 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:11:36,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:11:36,478 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:11:36,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:11:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:11:36,493 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 16:11:36,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 16:11:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:11:36,506 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 16:11:36,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 16:11:36,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:11:36,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 16:11:36,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:11:36,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:11:36,548 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 16:11:36,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 179 [2022-12-14 16:11:36,576 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 16:11:36,582 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 16:11:36,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2022-12-14 16:11:36,602 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 16:11:36,608 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:11:36,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4487#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:11:36,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:11:36,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:11:36,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-12-14 16:11:36,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782577368] [2022-12-14 16:11:36,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:11:36,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-14 16:11:36,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:36,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-14 16:11:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 16:11:36,876 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:41,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:41,033 INFO L93 Difference]: Finished difference Result 488 states and 683 transitions. [2022-12-14 16:11:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-14 16:11:41,033 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2022-12-14 16:11:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:41,035 INFO L225 Difference]: With dead ends: 488 [2022-12-14 16:11:41,035 INFO L226 Difference]: Without dead ends: 388 [2022-12-14 16:11:41,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 16:11:41,040 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 1262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1262 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:41,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1262 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 16:11:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-12-14 16:11:41,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2022-12-14 16:11:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.0077519379844961) internal successors, (390), 387 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 390 transitions. [2022-12-14 16:11:41,062 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 390 transitions. Word has length 194 [2022-12-14 16:11:41,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:41,063 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 390 transitions. [2022-12-14 16:11:41,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:11:41,063 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 390 transitions. [2022-12-14 16:11:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-12-14 16:11:41,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:41,071 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:41,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 16:11:41,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 16:11:41,273 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:41,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2040299050, now seen corresponding path program 7 times [2022-12-14 16:11:41,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:41,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081285522] [2022-12-14 16:11:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:41,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-12-14 16:11:58,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:58,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081285522] [2022-12-14 16:11:58,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081285522] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:11:58,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573306325] [2022-12-14 16:11:58,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 16:11:58,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:11:58,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:11:58,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:11:58,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 16:11:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:59,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-14 16:11:59,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:11:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-12-14 16:11:59,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-12-14 16:12:25,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573306325] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:25,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1191155039] [2022-12-14 16:12:25,414 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 16:12:25,414 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:12:25,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:12:25,414 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:12:25,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:12:25,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:12:25,431 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 16:12:25,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 16:12:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:12:25,448 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 16:12:25,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 16:12:25,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:12:25,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 16:12:25,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:12:25,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 16:12:25,502 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 16:12:25,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 177 treesize of output 180 [2022-12-14 16:12:25,530 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 16:12:25,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 16:12:25,555 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 16:12:25,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 56 [2022-12-14 16:12:25,573 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 16:12:25,582 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:12:43,315 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8924#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem2#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem2#1| 42) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:12:43,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:12:43,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:12:43,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-12-14 16:12:43,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469963992] [2022-12-14 16:12:43,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 16:12:43,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-14 16:12:43,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:12:43,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-14 16:12:43,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2022-12-14 16:12:43,333 INFO L87 Difference]: Start difference. First operand 388 states and 390 transitions. Second operand has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:13:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:31,436 INFO L93 Difference]: Finished difference Result 968 states and 1355 transitions. [2022-12-14 16:13:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-12-14 16:13:31,437 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2022-12-14 16:13:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:31,442 INFO L225 Difference]: With dead ends: 968 [2022-12-14 16:13:31,442 INFO L226 Difference]: Without dead ends: 772 [2022-12-14 16:13:31,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1348 GetRequests, 770 SyntacticMatches, 191 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112495 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2022-12-14 16:13:31,449 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 2137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2137 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:31,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2137 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 16:13:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-12-14 16:13:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 772. [2022-12-14 16:13:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.0038910505836576) internal successors, (774), 771 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:13:31,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 774 transitions. [2022-12-14 16:13:31,468 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 774 transitions. Word has length 386 [2022-12-14 16:13:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:31,468 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 774 transitions. [2022-12-14 16:13:31,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 16:13:31,469 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 774 transitions. [2022-12-14 16:13:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-12-14 16:13:31,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:31,482 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:31,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 16:13:31,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 16:13:31,684 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:13:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1619354154, now seen corresponding path program 8 times [2022-12-14 16:13:31,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:31,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179676806] [2022-12-14 16:13:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:31,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:14:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 146306 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-12-14 16:14:52,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:14:52,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179676806] [2022-12-14 16:14:52,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179676806] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:14:52,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525002422] [2022-12-14 16:14:52,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:14:52,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:14:52,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:14:52,224 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:14:52,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69205c8e-c5dd-4a15-bbec-0974a16155e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process