./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7 --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 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:37:19,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:37:19,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:37:19,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:37:19,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:37:19,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:37:19,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:37:19,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:37:19,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:37:19,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:37:19,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:37:19,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:37:19,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:37:19,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:37:19,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:37:19,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:37:19,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:37:19,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:37:19,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:37:19,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:37:19,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:37:19,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:37:19,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:37:19,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:37:19,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:37:19,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:37:19,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:37:19,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:37:19,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:37:19,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:37:19,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:37:19,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:37:19,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:37:19,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:37:19,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:37:19,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:37:19,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:37:19,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:37:19,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:37:19,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:37:19,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:37:19,503 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:37:19,556 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:37:19,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:37:19,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:37:19,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:37:19,558 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:37:19,558 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:37:19,558 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:37:19,558 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:37:19,559 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:37:19,559 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:37:19,560 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:37:19,560 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:37:19,561 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:37:19,561 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:37:19,561 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:37:19,562 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:37:19,562 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:37:19,562 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:37:19,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:37:19,563 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:37:19,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:37:19,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:37:19,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:37:19,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:37:19,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:37:19,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:37:19,566 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:37:19,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:37:19,566 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:37:19,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:37:19,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:37:19,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:37:19,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:37:19,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:37:19,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:37:19,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:37:19,568 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:37:19,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:37:19,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:37:19,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:37:19,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:37:19,569 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_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 [2021-11-25 18:37:19,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:37:19,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:37:19,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:37:19,896 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:37:19,896 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:37:19,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2021-11-25 18:37:19,961 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/data/d56929275/a5eff05df27e444c8e30803c24aa7cc3/FLAG10a5e4948 [2021-11-25 18:37:20,411 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:37:20,411 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2021-11-25 18:37:20,420 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/data/d56929275/a5eff05df27e444c8e30803c24aa7cc3/FLAG10a5e4948 [2021-11-25 18:37:20,783 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/data/d56929275/a5eff05df27e444c8e30803c24aa7cc3 [2021-11-25 18:37:20,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:37:20,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:37:20,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:37:20,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:37:20,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:37:20,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:37:20" (1/1) ... [2021-11-25 18:37:20,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b8aaccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:20, skipping insertion in model container [2021-11-25 18:37:20,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:37:20" (1/1) ... [2021-11-25 18:37:20,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:37:20,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:37:21,044 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_083fbb45-a7f6-4607-a019-f9e47badd5fc/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i[919,932] [2021-11-25 18:37:21,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:37:21,072 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:37:21,087 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_083fbb45-a7f6-4607-a019-f9e47badd5fc/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i[919,932] [2021-11-25 18:37:21,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:37:21,122 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:37:21,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:21 WrapperNode [2021-11-25 18:37:21,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:37:21,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:37:21,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:37:21,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:37:21,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:21" (1/1) ... [2021-11-25 18:37:21,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:21" (1/1) ... [2021-11-25 18:37:21,162 INFO L137 Inliner]: procedures = 17, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 45 [2021-11-25 18:37:21,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:37:21,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:37:21,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:37:21,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:37:21,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:21" (1/1) ... [2021-11-25 18:37:21,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:21" (1/1) ... [2021-11-25 18:37:21,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:21" (1/1) ... [2021-11-25 18:37:21,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:21" (1/1) ... [2021-11-25 18:37:21,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:21" (1/1) ... [2021-11-25 18:37:21,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:21" (1/1) ... [2021-11-25 18:37:21,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:21" (1/1) ... [2021-11-25 18:37:21,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:37:21,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:37:21,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:37:21,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:37:21,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:21" (1/1) ... [2021-11-25 18:37:21,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:37:21,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:21,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:37:21,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:37:21,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:37:21,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:37:21,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:37:21,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:37:21,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:37:21,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:37:21,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:37:21,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:37:21,378 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:37:21,380 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:37:21,498 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:37:21,562 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:37:21,563 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:37:21,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:37:21 BoogieIcfgContainer [2021-11-25 18:37:21,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:37:21,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:37:21,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:37:21,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:37:21,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:37:20" (1/3) ... [2021-11-25 18:37:21,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47e00f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:37:21, skipping insertion in model container [2021-11-25 18:37:21,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:37:21" (2/3) ... [2021-11-25 18:37:21,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47e00f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:37:21, skipping insertion in model container [2021-11-25 18:37:21,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:37:21" (3/3) ... [2021-11-25 18:37:21,580 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2021-11-25 18:37:21,585 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:37:21,586 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:37:21,662 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:37:21,669 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 [2021-11-25 18:37:21,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:37:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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) [2021-11-25 18:37:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:37:21,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:21,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:37:21,697 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:21,703 INFO L85 PathProgramCache]: Analyzing trace with hash 80317626, now seen corresponding path program 1 times [2021-11-25 18:37:21,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:21,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050572286] [2021-11-25 18:37:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:21,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:22,016 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:22,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050572286] [2021-11-25 18:37:22,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050572286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:37:22,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:37:22,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:37:22,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398614989] [2021-11-25 18:37:22,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:37:22,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:37:22,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:37:22,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:37:22,076 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-25 18:37:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:22,129 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-11-25 18:37:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:37:22,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-11-25 18:37:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:22,142 INFO L225 Difference]: With dead ends: 20 [2021-11-25 18:37:22,142 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 18:37:22,147 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 [2021-11-25 18:37:22,154 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:22,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:37:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 18:37:22,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2021-11-25 18:37:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2021-11-25 18:37:22,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-25 18:37:22,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-25 18:37:22,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:22,197 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-25 18:37:22,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-25 18:37:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-25 18:37:22,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:37:22,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:22,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:37:22,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:37:22,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:22,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1801489297, now seen corresponding path program 1 times [2021-11-25 18:37:22,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:22,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751899959] [2021-11-25 18:37:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:22,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:22,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751899959] [2021-11-25 18:37:22,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751899959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:22,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224651053] [2021-11-25 18:37:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:22,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:22,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:22,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:22,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:37:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:22,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 18:37:22,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:22,661 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:37:23,077 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-25 18:37:23,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 37 [2021-11-25 18:37:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:23,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:23,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 18:37:23,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-11-25 18:37:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:23,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224651053] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:23,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133188894] [2021-11-25 18:37:23,365 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 18:37:23,365 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:23,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:23,375 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:23,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:23,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:23,432 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:37:23,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:37:23,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:23,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:37:23,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:23,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:37:23,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:23,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:23,616 INFO L354 Elim1Store]: treesize reduction 115, result has 25.8 percent of original size [2021-11-25 18:37:23,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 216 treesize of output 238 [2021-11-25 18:37:23,827 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 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 18:37:23,855 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:24,058 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '94#(and (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|) (+ |ULTIMATE.start_main_~#array~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~index~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~index~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~index~0#1| 4294967296) (- 4294967296))) 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= (ite (< (mod |ULTIMATE.start_main_~index~0#1| 4294967296) (mod |ULTIMATE.start_main_#t~mem4#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~index~0#1| 0) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:24,058 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:24,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:24,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 9 [2021-11-25 18:37:24,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584668311] [2021-11-25 18:37:24,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:24,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:37:24,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:24,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:37:24,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:37:24,061 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 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) [2021-11-25 18:37:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:24,154 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-25 18:37:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:37:24,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 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 6 [2021-11-25 18:37:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:24,155 INFO L225 Difference]: With dead ends: 24 [2021-11-25 18:37:24,155 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 18:37:24,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:37:24,158 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:24,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2021-11-25 18:37:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 18:37:24,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 9. [2021-11-25 18:37:24,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-11-25 18:37:24,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-25 18:37:24,163 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-25 18:37:24,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:24,164 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-25 18:37:24,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 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) [2021-11-25 18:37:24,164 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-25 18:37:24,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:37:24,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:24,165 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-25 18:37:24,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:24,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:24,388 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:24,389 INFO L85 PathProgramCache]: Analyzing trace with hash -7961766, now seen corresponding path program 2 times [2021-11-25 18:37:24,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:24,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128439944] [2021-11-25 18:37:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:24,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:24,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128439944] [2021-11-25 18:37:24,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128439944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725426586] [2021-11-25 18:37:24,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:37:24,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:24,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:24,508 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:24,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:37:24,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:37:24,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:37:24,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 18:37:24,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:24,656 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:37:24,951 INFO L354 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2021-11-25 18:37:24,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2021-11-25 18:37:25,719 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-25 18:37:25,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 37 [2021-11-25 18:37:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:37:25,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:26,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 18:37:26,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-11-25 18:37:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:37:26,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725426586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:26,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2095193437] [2021-11-25 18:37:26,277 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 18:37:26,277 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:26,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:26,280 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:26,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:26,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:26,316 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:37:26,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:37:26,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:26,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:37:26,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:26,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 18:37:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:26,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:26,469 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-11-25 18:37:26,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2021-11-25 18:37:26,527 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 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 18:37:26,553 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:26,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '196#(and (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|) (+ |ULTIMATE.start_main_~#array~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~index~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~index~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~index~0#1| 4294967296) (- 4294967296))) 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= (ite (< (mod |ULTIMATE.start_main_~index~0#1| 4294967296) (mod |ULTIMATE.start_main_#t~mem4#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~index~0#1| 0) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:26,744 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:26,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:26,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2021-11-25 18:37:26,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79484650] [2021-11-25 18:37:26,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:26,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:37:26,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:26,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:37:26,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:37:26,746 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:37:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:26,895 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-11-25 18:37:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:37:26,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:37:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:26,896 INFO L225 Difference]: With dead ends: 19 [2021-11-25 18:37:26,896 INFO L226 Difference]: Without dead ends: 14 [2021-11-25 18:37:26,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:37:26,898 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:26,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 7 Unchecked, 0.0s Time] [2021-11-25 18:37:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-25 18:37:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2021-11-25 18:37:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:37:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-25 18:37:26,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2021-11-25 18:37:26,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:26,903 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-25 18:37:26,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:37:26,903 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-25 18:37:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:37:26,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:26,913 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:26,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:27,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:27,132 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:27,133 INFO L85 PathProgramCache]: Analyzing trace with hash 945672262, now seen corresponding path program 1 times [2021-11-25 18:37:27,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:27,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911572464] [2021-11-25 18:37:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:27,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:37:27,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:27,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911572464] [2021-11-25 18:37:27,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911572464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:27,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552202864] [2021-11-25 18:37:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:27,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:27,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:27,248 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:27,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:37:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:27,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 18:37:27,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:27,363 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:37:27,595 INFO L354 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2021-11-25 18:37:27,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2021-11-25 18:37:28,675 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-25 18:37:28,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 37 [2021-11-25 18:37:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:37:28,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:29,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-25 18:37:29,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-25 18:37:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:37:29,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552202864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:29,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1619165091] [2021-11-25 18:37:29,215 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:37:29,215 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:29,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:29,216 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:29,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:29,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:29,243 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:37:29,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 18:37:29,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:29,268 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:37:29,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:37:29,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:29,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:37:29,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:29,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:29,390 INFO L354 Elim1Store]: treesize reduction 115, result has 25.8 percent of original size [2021-11-25 18:37:29,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 216 treesize of output 238 [2021-11-25 18:37:29,566 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 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 18:37:29,712 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:30,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '329#(and (<= 0 |ULTIMATE.start_main_~index~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:30,044 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:30,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:30,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2021-11-25 18:37:30,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629825319] [2021-11-25 18:37:30,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:30,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:37:30,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:37:30,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:37:30,046 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 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) [2021-11-25 18:37:30,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:30,214 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-25 18:37:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:37:30,215 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 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 [2021-11-25 18:37:30,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:30,216 INFO L225 Difference]: With dead ends: 25 [2021-11-25 18:37:30,216 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 18:37:30,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:37:30,217 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:30,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 25 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2021-11-25 18:37:30,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 18:37:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-11-25 18:37:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:37:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-25 18:37:30,224 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-11-25 18:37:30,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:30,224 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-25 18:37:30,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 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) [2021-11-25 18:37:30,224 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-25 18:37:30,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:37:30,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:30,225 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1] [2021-11-25 18:37:30,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:30,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:30,426 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:30,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:30,426 INFO L85 PathProgramCache]: Analyzing trace with hash -632709542, now seen corresponding path program 2 times [2021-11-25 18:37:30,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:30,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419129654] [2021-11-25 18:37:30,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:30,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:37:30,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:30,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419129654] [2021-11-25 18:37:30,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419129654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:30,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920331472] [2021-11-25 18:37:30,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:37:30,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:30,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:30,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:30,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:37:30,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:37:30,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:37:30,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-25 18:37:30,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:30,862 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:37:31,061 INFO L354 Elim1Store]: treesize reduction 41, result has 39.7 percent of original size [2021-11-25 18:37:31,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 61 [2021-11-25 18:37:36,043 INFO L354 Elim1Store]: treesize reduction 105, result has 6.3 percent of original size [2021-11-25 18:37:36,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 57 [2021-11-25 18:37:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:36,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:42,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-25 18:37:42,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 98 [2021-11-25 18:37:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:37:43,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920331472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [26770798] [2021-11-25 18:37:43,071 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:37:43,071 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:43,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:43,072 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:43,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:43,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:43,099 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:37:43,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:37:43,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:43,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:37:43,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:43,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 18:37:43,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:43,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:43,220 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-11-25 18:37:43,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2021-11-25 18:37:43,263 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 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 18:37:43,386 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:43,715 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '510#(and (<= 0 |ULTIMATE.start_main_~index~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:43,716 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:43,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:43,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 20 [2021-11-25 18:37:43,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997109516] [2021-11-25 18:37:43,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:43,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 18:37:43,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:43,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 18:37:43,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=550, Unknown=3, NotChecked=0, Total=650 [2021-11-25 18:37:43,727 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 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) [2021-11-25 18:37:45,772 WARN L838 $PredicateComparison]: unable to prove that (and (<= 3 |c_ULTIMATE.start_main_~index~0#1|) (<= |c_ULTIMATE.start_main_~index~0#1| 3) (exists ((|aux_div_v_ULTIMATE.start_main_~index~0#1_71_54| Int) (|aux_div_ULTIMATE.start_main_~tmp~0#1_47| Int) (|aux_mod_aux_mod_v_ULTIMATE.start_main_~index~0#1_71_54_65| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~index~0#1_71_54_65| Int)) (let ((.cse4 (* 4294967296 |aux_div_aux_mod_v_ULTIMATE.start_main_~index~0#1_71_54_65|))) (let ((.cse2 (* 4294967296 |aux_div_ULTIMATE.start_main_~tmp~0#1_47|)) (.cse1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* (mod |aux_mod_aux_mod_v_ULTIMATE.start_main_~index~0#1_71_54_65| 4294967296) 4)))) (.cse0 (+ (* 4294967296 |aux_div_v_ULTIMATE.start_main_~index~0#1_71_54|) |aux_mod_aux_mod_v_ULTIMATE.start_main_~index~0#1_71_54_65| .cse4)) (.cse3 (+ |aux_mod_aux_mod_v_ULTIMATE.start_main_~index~0#1_71_54_65| .cse4))) (and (<= 2 .cse0) (< .cse1 (+ 4294967296 .cse2)) (<= 0 |aux_mod_aux_mod_v_ULTIMATE.start_main_~index~0#1_71_54_65|) (< (+ |aux_mod_aux_mod_v_ULTIMATE.start_main_~index~0#1_71_54_65| .cse2) .cse1) (<= .cse0 2) (<= 0 .cse3) (< .cse3 10000))))) (forall ((|aux_mod_ULTIMATE.start_main_#t~nondet2#1_51| Int) (|aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75_71| Int) (|aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75_71| Int) (|aux_div_aux_mod_ULTIMATE.start_main_~index~0#1_55_75| Int) (|aux_div_ULTIMATE.start_main_#t~nondet2#1_51| Int)) (let ((.cse7 (* 4294967296 |aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75_71|))) (let ((.cse5 (+ .cse7 |aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75_71|)) (.cse6 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~index~0#1_55_75|) .cse7 |aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75_71|))) (or (<= |aux_mod_ULTIMATE.start_main_#t~nondet2#1_51| .cse5) (< .cse6 4294977295) (< 2 (mod (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* (mod |aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75_71| 4294967296) 4)) (+ (* |aux_div_ULTIMATE.start_main_#t~nondet2#1_51| 4294967296) |aux_mod_ULTIMATE.start_main_#t~nondet2#1_51|)) (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 8)) 4294967296)) (<= 10000 |aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75_71|) (<= 4294967296 |aux_mod_ULTIMATE.start_main_#t~nondet2#1_51|) (< |aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~index~0#1_55_75_71| 0) (< .cse5 0) (<= 8589934591 .cse6)))))) is different from false [2021-11-25 18:37:47,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:47,156 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-11-25 18:37:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:37:47,157 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 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 15 [2021-11-25 18:37:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:47,158 INFO L225 Difference]: With dead ends: 32 [2021-11-25 18:37:47,158 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 18:37:47,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=4, NotChecked=50, Total=756 [2021-11-25 18:37:47,159 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:47,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 42 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-11-25 18:37:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 18:37:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-11-25 18:37:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2021-11-25 18:37:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-25 18:37:47,167 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2021-11-25 18:37:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:47,167 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-25 18:37:47,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 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) [2021-11-25 18:37:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-25 18:37:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 18:37:47,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:47,169 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1] [2021-11-25 18:37:47,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:47,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:47,383 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:47,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:47,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1033225658, now seen corresponding path program 3 times [2021-11-25 18:37:47,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:47,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236943847] [2021-11-25 18:37:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:47,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:37:47,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:47,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236943847] [2021-11-25 18:37:47,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236943847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:47,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370535611] [2021-11-25 18:37:47,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:37:47,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:47,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:47,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:47,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:37:47,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:37:47,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:37:47,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 18:37:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:37:47,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:37:47,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370535611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:47,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [945925517] [2021-11-25 18:37:47,887 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:37:47,887 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:47,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:47,887 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:47,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:47,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:47,924 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:37:47,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:37:47,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:47,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:37:47,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:47,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 18:37:48,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:48,036 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-11-25 18:37:48,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2021-11-25 18:37:48,083 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 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 18:37:48,211 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:48,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '727#(and (<= 0 |ULTIMATE.start_main_~index~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:48,487 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:48,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:48,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-25 18:37:48,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282033948] [2021-11-25 18:37:48,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:48,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:37:48,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:48,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:37:48,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:37:48,489 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 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) [2021-11-25 18:37:49,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:49,165 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2021-11-25 18:37:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:37:49,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 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 19 [2021-11-25 18:37:49,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:49,167 INFO L225 Difference]: With dead ends: 82 [2021-11-25 18:37:49,167 INFO L226 Difference]: Without dead ends: 69 [2021-11-25 18:37:49,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:37:49,168 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 154 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:49,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 90 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:37:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-25 18:37:49,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 27. [2021-11-25 18:37:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:37:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-25 18:37:49,177 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2021-11-25 18:37:49,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:49,177 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-25 18:37:49,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 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) [2021-11-25 18:37:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-25 18:37:49,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:37:49,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:49,178 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1] [2021-11-25 18:37:49,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:49,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:37:49,379 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:49,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:49,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1228318373, now seen corresponding path program 4 times [2021-11-25 18:37:49,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:49,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461060945] [2021-11-25 18:37:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:49,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:37:49,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:49,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461060945] [2021-11-25 18:37:49,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461060945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:49,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995529408] [2021-11-25 18:37:49,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:37:49,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:49,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:49,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:49,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:37:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:49,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 18:37:49,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:37:49,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:37:50,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995529408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:50,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [395667481] [2021-11-25 18:37:50,223 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:37:50,223 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:50,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:50,224 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:50,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:50,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:50,254 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:37:50,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:37:50,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:50,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:37:50,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:50,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:37:50,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:50,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:50,367 INFO L354 Elim1Store]: treesize reduction 115, result has 25.8 percent of original size [2021-11-25 18:37:50,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 216 treesize of output 238 [2021-11-25 18:37:50,473 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 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 18:37:50,583 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:50,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1095#(and (<= 0 |ULTIMATE.start_main_~index~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:50,865 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:50,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:50,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2021-11-25 18:37:50,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870301848] [2021-11-25 18:37:50,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:50,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 18:37:50,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:50,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 18:37:50,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=855, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 18:37:50,868 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 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) [2021-11-25 18:38:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:00,989 INFO L93 Difference]: Finished difference Result 166 states and 181 transitions. [2021-11-25 18:38:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 18:38:00,990 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 18:38:00,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:00,992 INFO L225 Difference]: With dead ends: 166 [2021-11-25 18:38:00,992 INFO L226 Difference]: Without dead ends: 153 [2021-11-25 18:38:00,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 18:38:00,994 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 538 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:00,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 468 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:38:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-25 18:38:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 41. [2021-11-25 18:38:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 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) [2021-11-25 18:38:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-11-25 18:38:01,011 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 26 [2021-11-25 18:38:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:01,011 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-11-25 18:38:01,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 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) [2021-11-25 18:38:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-11-25 18:38:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 18:38:01,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:01,013 INFO L514 BasicCegarLoop]: trace histogram [26, 4, 3, 3, 1, 1, 1, 1] [2021-11-25 18:38:01,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:01,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 18:38:01,236 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:38:01,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:01,237 INFO L85 PathProgramCache]: Analyzing trace with hash 107912955, now seen corresponding path program 5 times [2021-11-25 18:38:01,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:01,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850974515] [2021-11-25 18:38:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:01,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:38:01,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:01,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850974515] [2021-11-25 18:38:01,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850974515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:38:01,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817692733] [2021-11-25 18:38:01,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:38:01,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:01,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:01,988 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:01,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:43:18,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-25 18:43:18,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:43:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-25 18:43:18,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:43:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:43:18,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:43:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:43:22,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817692733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:43:22,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [499720616] [2021-11-25 18:43:22,773 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:43:22,773 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:43:22,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:43:22,774 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:43:22,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:43:22,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:22,803 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:43:22,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 18:43:22,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:22,830 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:43:22,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 18:43:22,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:22,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 18:43:22,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:22,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:22,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:22,947 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-11-25 18:43:22,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 247 [2021-11-25 18:43:22,985 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 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 18:43:23,100 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:43:23,603 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1743#(and (<= 0 |ULTIMATE.start_main_~index~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:43:23,604 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:43:23,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:43:23,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2021-11-25 18:43:23,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267921911] [2021-11-25 18:43:23,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:43:23,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-25 18:43:23,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:43:23,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-25 18:43:23,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=2871, Unknown=0, NotChecked=0, Total=3782 [2021-11-25 18:43:23,608 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 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) [2021-11-25 18:43:51,380 WARN L227 SmtUtils]: Spent 20.72s on a formula simplification. DAG size of input: 162 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:44:17,709 WARN L227 SmtUtils]: Spent 17.42s on a formula simplification. DAG size of input: 156 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:44:46,767 WARN L227 SmtUtils]: Spent 17.02s on a formula simplification. DAG size of input: 150 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:45:10,993 WARN L227 SmtUtils]: Spent 12.25s on a formula simplification. DAG size of input: 144 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:45:36,434 WARN L227 SmtUtils]: Spent 11.96s on a formula simplification. DAG size of input: 138 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:46:00,582 WARN L227 SmtUtils]: Spent 9.45s on a formula simplification. DAG size of input: 132 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:46:24,574 WARN L227 SmtUtils]: Spent 9.04s on a formula simplification. DAG size of input: 126 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:46:47,566 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification. DAG size of input: 120 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:47:06,045 WARN L227 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 114 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:47:27,488 WARN L227 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 108 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:47:52,343 WARN L227 SmtUtils]: Spent 8.58s on a formula simplification. DAG size of input: 102 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:49:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:49:45,904 INFO L93 Difference]: Finished difference Result 334 states and 363 transitions. [2021-11-25 18:49:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-25 18:49:45,912 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 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 40 [2021-11-25 18:49:45,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:49:45,915 INFO L225 Difference]: With dead ends: 334 [2021-11-25 18:49:45,916 INFO L226 Difference]: Without dead ends: 321 [2021-11-25 18:49:45,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 383.1s TimeCoverageRelationStatistics Valid=2384, Invalid=5263, Unknown=9, NotChecked=0, Total=7656 [2021-11-25 18:49:45,919 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 3278 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3278 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:49:45,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3278 Valid, 2118 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-25 18:49:45,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-25 18:49:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 69. [2021-11-25 18:49:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:49:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-11-25 18:49:45,943 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 40 [2021-11-25 18:49:45,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:49:45,944 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-11-25 18:49:45,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 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) [2021-11-25 18:49:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-11-25 18:49:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 18:49:45,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:49:45,946 INFO L514 BasicCegarLoop]: trace histogram [54, 4, 3, 3, 1, 1, 1, 1] [2021-11-25 18:49:45,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:49:46,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 18:49:46,152 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:49:46,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:49:46,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1321476667, now seen corresponding path program 6 times [2021-11-25 18:49:46,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:49:46,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878649991] [2021-11-25 18:49:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:49:46,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:49:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:49:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:49:48,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:49:48,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878649991] [2021-11-25 18:49:48,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878649991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:49:48,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819656194] [2021-11-25 18:49:48,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:49:48,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:49:48,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:49:48,225 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:49:48,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083fbb45-a7f6-4607-a019-f9e47badd5fc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process