./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V --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 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:12:49,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:12:49,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:12:49,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:12:49,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:12:49,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:12:49,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:12:49,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:12:49,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:12:49,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:12:49,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:12:49,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:12:49,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:12:49,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:12:49,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:12:49,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:12:49,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:12:49,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:12:49,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:12:49,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:12:49,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:12:49,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:12:49,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:12:49,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:12:49,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:12:49,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:12:49,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:12:49,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:12:49,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:12:49,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:12:49,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:12:49,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:12:49,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:12:49,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:12:49,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:12:49,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:12:49,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:12:49,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:12:49,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:12:49,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:12:49,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:12:49,426 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:12:49,452 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:12:49,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:12:49,456 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:12:49,456 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:12:49,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:12:49,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:12:49,457 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:12:49,458 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:12:49,458 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:12:49,458 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:12:49,458 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:12:49,462 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:12:49,463 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:12:49,463 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:12:49,463 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:12:49,463 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:12:49,464 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:12:49,464 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:12:49,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:12:49,465 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:12:49,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:12:49,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:12:49,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:12:49,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:12:49,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:12:49,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:12:49,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:12:49,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:12:49,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:12:49,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:12:49,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:12:49,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:12:49,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:12:49,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:12:49,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:12:49,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:12:49,472 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:12:49,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:12:49,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:12:49,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:12:49,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:12:49,473 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac [2021-11-23 03:12:49,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:12:49,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:12:49,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:12:49,840 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:12:49,843 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:12:49,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2021-11-23 03:12:49,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/data/22ef84805/8a2020f5544947138369e554e1aa3af9/FLAG4b07bd8ec [2021-11-23 03:12:50,407 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:12:50,408 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2021-11-23 03:12:50,418 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/data/22ef84805/8a2020f5544947138369e554e1aa3af9/FLAG4b07bd8ec [2021-11-23 03:12:50,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/data/22ef84805/8a2020f5544947138369e554e1aa3af9 [2021-11-23 03:12:50,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:12:50,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:12:50,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:12:50,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:12:50,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:12:50,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:12:50" (1/1) ... [2021-11-23 03:12:50,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1218ae56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:50, skipping insertion in model container [2021-11-23 03:12:50,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:12:50" (1/1) ... [2021-11-23 03:12:50,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:12:50,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:12:50,993 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2021-11-23 03:12:51,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:12:51,016 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:12:51,029 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2021-11-23 03:12:51,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:12:51,051 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:12:51,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:51 WrapperNode [2021-11-23 03:12:51,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:12:51,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:12:51,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:12:51,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:12:51,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:51" (1/1) ... [2021-11-23 03:12:51,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:51" (1/1) ... [2021-11-23 03:12:51,087 INFO L137 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2021-11-23 03:12:51,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:12:51,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:12:51,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:12:51,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:12:51,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:51" (1/1) ... [2021-11-23 03:12:51,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:51" (1/1) ... [2021-11-23 03:12:51,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:51" (1/1) ... [2021-11-23 03:12:51,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:51" (1/1) ... [2021-11-23 03:12:51,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:51" (1/1) ... [2021-11-23 03:12:51,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:51" (1/1) ... [2021-11-23 03:12:51,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:51" (1/1) ... [2021-11-23 03:12:51,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:12:51,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:12:51,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:12:51,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:12:51,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:51" (1/1) ... [2021-11-23 03:12:51,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:12:51,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:51,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:12:51,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:12:51,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:12:51,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:12:51,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:12:51,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:12:51,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:12:51,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:12:51,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:12:51,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:12:51,280 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:12:51,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:12:51,463 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:12:51,517 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:12:51,532 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:12:51,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:12:51 BoogieIcfgContainer [2021-11-23 03:12:51,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:12:51,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:12:51,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:12:51,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:12:51,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:12:50" (1/3) ... [2021-11-23 03:12:51,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3383c470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:12:51, skipping insertion in model container [2021-11-23 03:12:51,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:12:51" (2/3) ... [2021-11-23 03:12:51,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3383c470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:12:51, skipping insertion in model container [2021-11-23 03:12:51,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:12:51" (3/3) ... [2021-11-23 03:12:51,549 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr.c [2021-11-23 03:12:51,564 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:12:51,565 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:12:51,620 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:12:51,627 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:12:51,627 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:12:51,641 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) [2021-11-23 03:12:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:12:51,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:51,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:12:51,647 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:51,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:51,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1387171958, now seen corresponding path program 1 times [2021-11-23 03:12:51,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:51,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578589067] [2021-11-23 03:12:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:51,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:51,831 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:51,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578589067] [2021-11-23 03:12:51,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578589067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:51,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:51,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:12:51,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287847334] [2021-11-23 03:12:51,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:51,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:12:51,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:51,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:12:51,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:12:51,869 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) [2021-11-23 03:12:51,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:51,905 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2021-11-23 03:12:51,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:12:51,908 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 [2021-11-23 03:12:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:51,915 INFO L225 Difference]: With dead ends: 17 [2021-11-23 03:12:51,915 INFO L226 Difference]: Without dead ends: 9 [2021-11-23 03:12:51,918 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:12:51,921 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:51,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:12:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-23 03:12:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-23 03:12:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-23 03:12:51,952 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2021-11-23 03:12:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:51,953 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-23 03:12:51,953 INFO L471 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) [2021-11-23 03:12:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-23 03:12:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:12:51,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:51,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:51,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:12:51,955 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:51,956 INFO L85 PathProgramCache]: Analyzing trace with hash -110753083, now seen corresponding path program 1 times [2021-11-23 03:12:51,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:51,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672073454] [2021-11-23 03:12:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:51,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:12:52,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:52,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672073454] [2021-11-23 03:12:52,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672073454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:52,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:12:52,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:12:52,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452230637] [2021-11-23 03:12:52,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:52,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:12:52,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:52,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:12:52,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:12:52,024 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:52,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:52,046 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-11-23 03:12:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:12:52,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:12:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:52,048 INFO L225 Difference]: With dead ends: 15 [2021-11-23 03:12:52,048 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 03:12:52,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:12:52,050 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6 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 [2021-11-23 03:12:52,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:12:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 03:12:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-23 03:12:52,054 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) [2021-11-23 03:12:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-23 03:12:52,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-23 03:12:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:52,056 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-23 03:12:52,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-23 03:12:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:12:52,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:52,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:52,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:12:52,057 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:52,058 INFO L85 PathProgramCache]: Analyzing trace with hash 849702428, now seen corresponding path program 1 times [2021-11-23 03:12:52,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:52,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86166651] [2021-11-23 03:12:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:52,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:12:52,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:52,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86166651] [2021-11-23 03:12:52,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86166651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:12:52,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777206467] [2021-11-23 03:12:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:52,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:52,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:52,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:52,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:12:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:12:52,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:12:52,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:12:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:12:52,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777206467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:12:52,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981111826] [2021-11-23 03:12:52,476 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:12:52,476 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:12:52,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:12:52,488 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:12:52,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:12:52,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:52,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:52,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:52,718 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-23 03:12:52,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-23 03:12:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:52,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:52,888 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 03:12:52,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 03:12:53,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:53,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:53,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-23 03:12:53,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:53,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:53,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:53,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:53,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:53,548 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-23 03:12:53,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 428 treesize of output 426 [2021-11-23 03:12:54,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:54,435 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-23 03:12:54,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-23 03:12:54,501 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-23 03:12:54,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-23 03:12:54,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:54,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:54,625 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-23 03:12:54,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-23 03:12:54,715 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:12:54,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '141#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-23 03:12:54,961 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:12:54,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:12:54,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-11-23 03:12:54,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809736619] [2021-11-23 03:12:54,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:12:54,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:12:54,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:54,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:12:54,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:12:54,963 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:54,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:54,994 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-11-23 03:12:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:12:54,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 03:12:54,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:54,996 INFO L225 Difference]: With dead ends: 20 [2021-11-23 03:12:54,996 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 03:12:54,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:12:55,003 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:55,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:12:55,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 03:12:55,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-23 03:12:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-23 03:12:55,013 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-11-23 03:12:55,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:55,013 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-23 03:12:55,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:55,014 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-23 03:12:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:12:55,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:55,016 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:55,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:12:55,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:55,233 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash 193659703, now seen corresponding path program 2 times [2021-11-23 03:12:55,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:55,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982381192] [2021-11-23 03:12:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:55,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:12:55,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:55,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982381192] [2021-11-23 03:12:55,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982381192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:12:55,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176468627] [2021-11-23 03:12:55,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:12:55,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:55,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:55,373 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:55,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:12:55,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:12:55,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:12:55,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:12:55,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:12:55,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:12:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:12:55,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176468627] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:12:55,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [430743808] [2021-11-23 03:12:55,557 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:12:55,557 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:12:55,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:12:55,558 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:12:55,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:12:55,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:55,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:55,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:55,666 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-23 03:12:55,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-23 03:12:55,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:55,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:55,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:55,805 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 03:12:55,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 03:12:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:55,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:55,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-23 03:12:56,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:56,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:56,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:56,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:56,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:56,109 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-23 03:12:56,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 428 treesize of output 426 [2021-11-23 03:12:56,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:56,534 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-23 03:12:56,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-23 03:12:56,589 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-23 03:12:56,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-23 03:12:56,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:56,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:56,681 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-23 03:12:56,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-23 03:12:56,764 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:12:57,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '270#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-23 03:12:57,005 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:12:57,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:12:57,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2021-11-23 03:12:57,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084153974] [2021-11-23 03:12:57,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:12:57,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:12:57,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:12:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:12:57,008 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 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) [2021-11-23 03:12:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:57,172 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-11-23 03:12:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:12:57,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 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 11 [2021-11-23 03:12:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:57,173 INFO L225 Difference]: With dead ends: 55 [2021-11-23 03:12:57,174 INFO L226 Difference]: Without dead ends: 48 [2021-11-23 03:12:57,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:12:57,175 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:57,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 27 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:12:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-23 03:12:57,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 22. [2021-11-23 03:12:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-11-23 03:12:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-23 03:12:57,182 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2021-11-23 03:12:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:57,183 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-23 03:12:57,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 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) [2021-11-23 03:12:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-23 03:12:57,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:12:57,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:57,184 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:57,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:12:57,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:57,401 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1909590116, now seen corresponding path program 3 times [2021-11-23 03:12:57,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:57,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465239545] [2021-11-23 03:12:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:57,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 03:12:57,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:57,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465239545] [2021-11-23 03:12:57,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465239545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:12:57,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707274763] [2021-11-23 03:12:57,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:12:57,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:57,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:57,584 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:57,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:12:57,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:12:57,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:12:57,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:12:57,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 03:12:57,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:12:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 03:12:58,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707274763] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:12:58,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499020409] [2021-11-23 03:12:58,016 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:12:58,017 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:12:58,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:12:58,017 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:12:58,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:12:58,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:58,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:58,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:58,166 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 03:12:58,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 03:12:58,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:58,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:58,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:58,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-23 03:12:58,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:58,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:58,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-23 03:12:58,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:58,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:58,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:58,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:58,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:58,446 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-23 03:12:58,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 427 treesize of output 425 [2021-11-23 03:12:58,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:58,914 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-23 03:12:58,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-23 03:12:58,969 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-23 03:12:58,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-23 03:12:59,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:59,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:59,061 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-23 03:12:59,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-23 03:12:59,136 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:12:59,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '546#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-23 03:12:59,473 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:12:59,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:12:59,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2021-11-23 03:12:59,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349425318] [2021-11-23 03:12:59,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:12:59,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 03:12:59,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:59,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 03:12:59,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2021-11-23 03:12:59,475 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 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) [2021-11-23 03:12:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:59,814 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-11-23 03:12:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 03:12:59,814 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 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 20 [2021-11-23 03:12:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:59,816 INFO L225 Difference]: With dead ends: 124 [2021-11-23 03:12:59,816 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 03:12:59,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=607, Invalid=953, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 03:12:59,818 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 252 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:59,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 60 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:12:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 03:12:59,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 40. [2021-11-23 03:12:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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) [2021-11-23 03:12:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-23 03:12:59,828 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2021-11-23 03:12:59,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:59,828 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-23 03:12:59,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 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) [2021-11-23 03:12:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-23 03:12:59,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 03:12:59,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:59,830 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:59,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:00,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:00,055 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:13:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:00,055 INFO L85 PathProgramCache]: Analyzing trace with hash 726013834, now seen corresponding path program 4 times [2021-11-23 03:13:00,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:00,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525044734] [2021-11-23 03:13:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:00,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-23 03:13:00,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:00,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525044734] [2021-11-23 03:13:00,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525044734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:00,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626225741] [2021-11-23 03:13:00,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:13:00,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:00,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:00,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:00,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:13:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:00,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:13:00,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-23 03:13:01,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-23 03:13:01,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626225741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:01,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295267898] [2021-11-23 03:13:01,610 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:13:01,611 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:13:01,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:13:01,612 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:13:01,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:13:01,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:01,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:01,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:01,732 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-23 03:13:01,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-23 03:13:01,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:01,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:01,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:01,878 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 03:13:01,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 03:13:01,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:01,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2021-11-23 03:13:02,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:02,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:02,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:02,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:02,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:02,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:02,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:02,095 INFO L354 Elim1Store]: treesize reduction 144, result has 12.2 percent of original size [2021-11-23 03:13:02,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 436 treesize of output 422 [2021-11-23 03:13:02,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:02,197 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-23 03:13:02,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-23 03:13:02,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:02,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:02,255 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-23 03:13:02,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-23 03:13:02,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:02,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:02,343 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-23 03:13:02,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-23 03:13:02,419 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:13:02,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1099#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-23 03:13:02,584 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:13:02,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:02,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2021-11-23 03:13:02,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171680617] [2021-11-23 03:13:02,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:02,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 03:13:02,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:02,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 03:13:02,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 03:13:02,590 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 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) [2021-11-23 03:13:02,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:02,702 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2021-11-23 03:13:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 03:13:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 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 38 [2021-11-23 03:13:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:02,704 INFO L225 Difference]: With dead ends: 80 [2021-11-23 03:13:02,705 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 03:13:02,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 03:13:02,707 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:02,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:13:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 03:13:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-23 03:13:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-11-23 03:13:02,718 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 38 [2021-11-23 03:13:02,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:02,719 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-11-23 03:13:02,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 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) [2021-11-23 03:13:02,719 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-11-23 03:13:02,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 03:13:02,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:02,722 INFO L514 BasicCegarLoop]: trace histogram [34, 16, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:02,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:02,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:13:02,943 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:13:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:02,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1878074902, now seen corresponding path program 5 times [2021-11-23 03:13:02,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:02,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952295685] [2021-11-23 03:13:02,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:02,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-23 03:13:03,665 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:03,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952295685] [2021-11-23 03:13:03,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952295685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:03,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616680990] [2021-11-23 03:13:03,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:13:03,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:03,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:03,668 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:03,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:13:11,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 03:13:11,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:13:11,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:13:11,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-11-23 03:13:11,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-11-23 03:13:12,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616680990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:12,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2121994815] [2021-11-23 03:13:12,531 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:13:12,531 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:13:12,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:13:12,532 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:13:12,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:13:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:12,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:12,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:12,637 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-23 03:13:12,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-23 03:13:12,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:12,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:12,754 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 03:13:12,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 03:13:12,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:12,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:12,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-23 03:13:12,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:12,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:12,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:12,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:12,990 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-23 03:13:12,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 428 treesize of output 426 [2021-11-23 03:13:13,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:13,265 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-23 03:13:13,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-23 03:13:13,312 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-23 03:13:13,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2021-11-23 03:13:13,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:13,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:13,399 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-23 03:13:13,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-23 03:13:13,486 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:13:14,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1768#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-23 03:13:14,404 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:13:14,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:13:14,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19, 19] total 72 [2021-11-23 03:13:14,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975802165] [2021-11-23 03:13:14,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:14,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-23 03:13:14,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:14,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-23 03:13:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2629, Invalid=3223, Unknown=0, NotChecked=0, Total=5852 [2021-11-23 03:13:14,410 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 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) [2021-11-23 03:13:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:16,303 INFO L93 Difference]: Finished difference Result 385 states and 442 transitions. [2021-11-23 03:13:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-23 03:13:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 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 56 [2021-11-23 03:13:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:16,306 INFO L225 Difference]: With dead ends: 385 [2021-11-23 03:13:16,307 INFO L226 Difference]: Without dead ends: 363 [2021-11-23 03:13:16,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 110 SyntacticMatches, 17 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5666 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4729, Invalid=7703, Unknown=0, NotChecked=0, Total=12432 [2021-11-23 03:13:16,313 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 978 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:16,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 177 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:13:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-23 03:13:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 112. [2021-11-23 03:13:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 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) [2021-11-23 03:13:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2021-11-23 03:13:16,332 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 56 [2021-11-23 03:13:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:16,333 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2021-11-23 03:13:16,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 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) [2021-11-23 03:13:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2021-11-23 03:13:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 03:13:16,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:16,338 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:16,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 03:13:16,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 03:13:16,553 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:13:16,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash -98618998, now seen corresponding path program 6 times [2021-11-23 03:13:16,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:13:16,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898282439] [2021-11-23 03:13:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:16,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:13:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-11-23 03:13:18,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:18,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898282439] [2021-11-23 03:13:18,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898282439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:13:18,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665271964] [2021-11-23 03:13:18,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:13:18,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:18,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:18,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:18,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:21:06,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:21:06,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:21:06,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-23 03:21:06,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:21:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-11-23 03:21:08,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:21:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-11-23 03:21:11,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665271964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:21:11,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916952786] [2021-11-23 03:21:11,404 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:21:11,404 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:21:11,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:21:11,405 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:21:11,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:21:11,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,492 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-23 03:21:11,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-23 03:21:11,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,625 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 03:21:11,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 03:21:11,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2021-11-23 03:21:11,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:11,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:11,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:11,859 INFO L354 Elim1Store]: treesize reduction 144, result has 12.2 percent of original size [2021-11-23 03:21:11,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 436 treesize of output 422 [2021-11-23 03:21:11,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:11,966 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-23 03:21:11,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-23 03:21:11,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:11,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:12,022 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-23 03:21:12,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-23 03:21:12,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:12,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:12,124 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-23 03:21:12,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-23 03:21:12,160 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:21:12,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3439#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-23 03:21:12,333 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:21:12,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:21:12,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 162 [2021-11-23 03:21:12,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375926130] [2021-11-23 03:21:12,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:21:12,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-11-23 03:21:12,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:12,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-11-23 03:21:12,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12160, Invalid=15562, Unknown=0, NotChecked=0, Total=27722 [2021-11-23 03:21:12,346 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 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) [2021-11-23 03:21:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:20,306 INFO L93 Difference]: Finished difference Result 799 states and 910 transitions. [2021-11-23 03:21:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-23 03:21:20,306 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 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 110 [2021-11-23 03:21:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:20,311 INFO L225 Difference]: With dead ends: 799 [2021-11-23 03:21:20,311 INFO L226 Difference]: Without dead ends: 741 [2021-11-23 03:21:20,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18434 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=18202, Invalid=29978, Unknown=0, NotChecked=0, Total=48180 [2021-11-23 03:21:20,318 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2154 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 1386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2154 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1386 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:20,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2154 Valid, 408 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1386 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:21:20,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-11-23 03:21:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 220. [2021-11-23 03:21:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0136986301369864) internal successors, (222), 219 states have internal predecessors, (222), 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) [2021-11-23 03:21:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2021-11-23 03:21:20,348 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 110 [2021-11-23 03:21:20,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:20,348 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2021-11-23 03:21:20,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 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) [2021-11-23 03:21:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2021-11-23 03:21:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-23 03:21:20,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:20,357 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:20,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:21:20,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:20,565 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1978675062, now seen corresponding path program 7 times [2021-11-23 03:21:20,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:20,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772817020] [2021-11-23 03:21:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:20,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-11-23 03:21:25,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:25,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772817020] [2021-11-23 03:21:25,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772817020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:21:25,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745157919] [2021-11-23 03:21:25,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:21:25,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:25,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:21:25,213 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:21:25,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:21:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:25,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-23 03:21:25,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:21:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-11-23 03:21:31,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:21:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-11-23 03:21:43,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745157919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:21:43,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [502777696] [2021-11-23 03:21:43,280 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:21:43,280 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:21:43,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:21:43,280 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:21:43,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:21:43,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:43,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:43,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:43,407 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 03:21:43,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 03:21:43,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:43,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:43,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:43,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-23 03:21:43,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:43,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:43,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-23 03:21:43,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:43,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:43,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:43,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:43,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:43,621 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-23 03:21:43,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 427 treesize of output 425 [2021-11-23 03:21:44,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:44,032 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-23 03:21:44,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-23 03:21:44,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:44,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:44,086 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-23 03:21:44,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-23 03:21:44,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:44,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:44,163 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-23 03:21:44,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-23 03:21:44,204 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:21:44,434 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6782#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-23 03:21:44,434 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:21:44,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:21:44,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 322 [2021-11-23 03:21:44,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816064685] [2021-11-23 03:21:44,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:21:44,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 323 states [2021-11-23 03:21:44,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:44,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 323 interpolants. [2021-11-23 03:21:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47409, Invalid=59193, Unknown=0, NotChecked=0, Total=106602 [2021-11-23 03:21:44,458 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 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) [2021-11-23 03:21:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:45,601 INFO L93 Difference]: Finished difference Result 440 states and 551 transitions. [2021-11-23 03:21:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-11-23 03:21:45,602 INFO L78 Accepts]: Start accepts. Automaton has has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 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 218 [2021-11-23 03:21:45,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:45,605 INFO L225 Difference]: With dead ends: 440 [2021-11-23 03:21:45,605 INFO L226 Difference]: Without dead ends: 328 [2021-11-23 03:21:45,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47918 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=47409, Invalid=59193, Unknown=0, NotChecked=0, Total=106602 [2021-11-23 03:21:45,661 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:45,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:21:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-23 03:21:45,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2021-11-23 03:21:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.0091743119266054) internal successors, (330), 327 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 330 transitions. [2021-11-23 03:21:45,699 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 330 transitions. Word has length 218 [2021-11-23 03:21:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:45,699 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 330 transitions. [2021-11-23 03:21:45,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 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) [2021-11-23 03:21:45,700 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 330 transitions. [2021-11-23 03:21:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-23 03:21:45,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:45,710 INFO L514 BasicCegarLoop]: trace histogram [214, 106, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:45,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:21:45,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:45,925 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:45,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:45,925 INFO L85 PathProgramCache]: Analyzing trace with hash 835196618, now seen corresponding path program 8 times [2021-11-23 03:21:45,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:45,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253182166] [2021-11-23 03:21:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:45,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:22:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 28676 backedges. 0 proven. 23005 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-11-23 03:22:03,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:22:03,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253182166] [2021-11-23 03:22:03,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253182166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:22:03,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053991758] [2021-11-23 03:22:03,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:22:03,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:22:03,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:22:03,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:22:03,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a771866e-68da-48ce-8082-feb90d4ea5e7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process