./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/Mono4_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/Mono4_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH --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 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:19:10,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:19:10,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:19:10,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:19:10,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:19:10,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:19:10,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:19:10,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:19:10,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:19:10,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:19:10,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:19:10,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:19:10,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:19:10,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:19:10,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:19:10,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:19:10,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:19:10,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:19:10,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:19:10,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:19:10,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:19:10,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:19:10,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:19:10,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:19:10,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:19:10,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:19:10,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:19:10,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:19:10,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:19:10,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:19:10,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:19:10,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:19:10,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:19:10,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:19:10,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:19:10,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:19:10,575 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:19:10,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:19:10,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:19:10,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:19:10,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:19:10,579 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:19:10,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:19:10,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:19:10,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:19:10,607 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:19:10,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:19:10,608 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:19:10,608 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:19:10,608 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:19:10,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:19:10,609 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:19:10,609 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:19:10,609 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:19:10,610 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:19:10,610 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:19:10,610 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:19:10,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:19:10,611 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:19:10,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:19:10,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:19:10,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:19:10,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:19:10,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:19:10,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:19:10,613 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:19:10,613 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:19:10,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:19:10,614 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:19:10,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:19:10,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:19:10,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:19:10,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:19:10,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:19:10,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:19:10,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:19:10,616 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:19:10,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:19:10,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:19:10,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:19:10,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:19:10,617 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_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e [2021-11-03 04:19:10,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:19:10,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:19:10,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:19:10,930 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:19:10,931 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:19:10,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2021-11-03 04:19:11,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/data/de8f16ac3/9499621824364f208aba99b1a8173c5b/FLAG8a949cb74 [2021-11-03 04:19:11,493 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:19:11,494 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2021-11-03 04:19:11,505 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/data/de8f16ac3/9499621824364f208aba99b1a8173c5b/FLAG8a949cb74 [2021-11-03 04:19:11,861 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/data/de8f16ac3/9499621824364f208aba99b1a8173c5b [2021-11-03 04:19:11,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:19:11,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:19:11,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:19:11,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:19:11,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:19:11,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:19:11" (1/1) ... [2021-11-03 04:19:11,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188f41b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:11, skipping insertion in model container [2021-11-03 04:19:11,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:19:11" (1/1) ... [2021-11-03 04:19:11,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:19:11,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:19:12,078 WARN L228 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_95de70f3-8182-4633-b897-0eaa64874c4b/sv-benchmarks/c/loops-crafted-1/Mono4_1.c[311,324] [2021-11-03 04:19:12,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:19:12,104 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:19:12,118 WARN L228 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_95de70f3-8182-4633-b897-0eaa64874c4b/sv-benchmarks/c/loops-crafted-1/Mono4_1.c[311,324] [2021-11-03 04:19:12,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:19:12,138 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:19:12,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:12 WrapperNode [2021-11-03 04:19:12,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:19:12,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:19:12,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:19:12,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:19:12,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:12" (1/1) ... [2021-11-03 04:19:12,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:12" (1/1) ... [2021-11-03 04:19:12,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:19:12,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:19:12,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:19:12,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:19:12,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:12" (1/1) ... [2021-11-03 04:19:12,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:12" (1/1) ... [2021-11-03 04:19:12,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:12" (1/1) ... [2021-11-03 04:19:12,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:12" (1/1) ... [2021-11-03 04:19:12,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:12" (1/1) ... [2021-11-03 04:19:12,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:12" (1/1) ... [2021-11-03 04:19:12,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:12" (1/1) ... [2021-11-03 04:19:12,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:19:12,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:19:12,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:19:12,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:19:12,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:12" (1/1) ... [2021-11-03 04:19:12,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:19:12,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:19:12,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:19:12,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:19:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:19:12,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:19:12,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:19:12,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:19:12,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:19:12,582 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 04:19:12,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:19:12 BoogieIcfgContainer [2021-11-03 04:19:12,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:19:12,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:19:12,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:19:12,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:19:12,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:19:11" (1/3) ... [2021-11-03 04:19:12,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f92c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:19:12, skipping insertion in model container [2021-11-03 04:19:12,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:12" (2/3) ... [2021-11-03 04:19:12,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f92c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:19:12, skipping insertion in model container [2021-11-03 04:19:12,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:19:12" (3/3) ... [2021-11-03 04:19:12,596 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2021-11-03 04:19:12,603 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:19:12,603 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:19:12,661 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:19:12,669 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 [2021-11-03 04:19:12,669 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:19:12,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2021-11-03 04:19:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 04:19:12,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:12,690 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 04:19:12,691 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:19:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2034246, now seen corresponding path program 1 times [2021-11-03 04:19:12,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:19:12,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290702503] [2021-11-03 04:19:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:12,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:19:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:12,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:19:12,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290702503] [2021-11-03 04:19:12,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290702503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:12,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:12,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:19:12,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797379763] [2021-11-03 04:19:12,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:19:12,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:19:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:19:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:19:12,960 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-03 04:19:13,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:13,026 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-03 04:19:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:19:13,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-03 04:19:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:13,036 INFO L225 Difference]: With dead ends: 13 [2021-11-03 04:19:13,037 INFO L226 Difference]: Without dead ends: 6 [2021-11-03 04:19:13,040 INFO L786 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 [2021-11-03 04:19:13,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-03 04:19:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-03 04:19:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-03 04:19:13,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-03 04:19:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:13,074 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-03 04:19:13,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-03 04:19:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-03 04:19:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:19:13,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:13,076 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:19:13,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:19:13,076 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:19:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:13,078 INFO L85 PathProgramCache]: Analyzing trace with hash 63135587, now seen corresponding path program 1 times [2021-11-03 04:19:13,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:19:13,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350744798] [2021-11-03 04:19:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:13,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:19:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:13,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:19:13,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350744798] [2021-11-03 04:19:13,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350744798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:19:13,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672062241] [2021-11-03 04:19:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:13,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:19:13,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:19:13,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:19:13,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:19:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:13,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:19:13,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:13,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:13,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672062241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:19:13,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1898523540] [2021-11-03 04:19:13,463 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:19:13,464 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:19:13,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:19:13,475 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:19:13,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:19:13,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:13,512 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:13,514 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:13,515 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:19:13,516 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:13,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:13,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:19:13,523 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 04:19:13,549 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-03 04:19:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:13,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:19:13,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:13,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:19:13,583 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:13,584 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:19:13,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:19:13,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:13,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:13,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:13,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:13,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:13,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:13,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:13,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:13,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:13,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:13,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:19:13,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:13,656 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:19:13,657 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:13,659 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:19:13,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:19:13,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:13,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:13,744 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:13,755 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:19:13,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:19:13,757 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 04:19:13,774 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 04:19:13,785 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:19:13,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:13,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:13,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:13,991 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:14,010 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:14,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:14,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 426 [2021-11-03 04:19:14,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 468 [2021-11-03 04:19:14,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,280 INFO L180 QuantifierPusher]: treesize reduction 30, result has 69.7 percent of original size [2021-11-03 04:19:14,285 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:14,289 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:14,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 04:19:14,311 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-03 04:19:14,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:14,346 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-03 04:19:14,351 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:14,353 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:14,357 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-03 04:19:14,367 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:19:14,386 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:19:14,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:19:14,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:19:14,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-03 04:19:14,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494823026] [2021-11-03 04:19:14,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:19:14,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:19:14,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:19:14,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:19:14,654 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2021-11-03 04:19:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:14,674 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-03 04:19:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:19:14,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) Word has length 5 [2021-11-03 04:19:14,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:14,676 INFO L225 Difference]: With dead ends: 12 [2021-11-03 04:19:14,676 INFO L226 Difference]: Without dead ends: 9 [2021-11-03 04:19:14,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:19:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-03 04:19:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-03 04:19:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2021-11-03 04:19:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-03 04:19:14,687 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-03 04:19:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:14,688 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-03 04:19:14,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2021-11-03 04:19:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-03 04:19:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:19:14,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:14,690 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-03 04:19:14,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:14,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:19:14,917 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:19:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash -249960058, now seen corresponding path program 2 times [2021-11-03 04:19:14,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:19:14,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873386583] [2021-11-03 04:19:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:14,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:19:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:15,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:19:15,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873386583] [2021-11-03 04:19:15,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873386583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:19:15,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277682421] [2021-11-03 04:19:15,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:19:15,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:19:15,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:19:15,092 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:19:15,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 04:19:15,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 04:19:15,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:19:15,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:19:15,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:15,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:15,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277682421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:19:15,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340010517] [2021-11-03 04:19:15,551 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:19:15,552 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:19:15,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:19:15,552 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:19:15,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:19:15,564 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,566 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:15,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:19:15,573 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:15,573 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,574 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:19:15,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 04:19:15,585 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-03 04:19:15,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:15,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:15,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:15,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:19:15,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:19:15,615 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:19:15,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:19:15,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:15,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:15,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:15,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:15,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:15,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:15,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:15,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:15,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:15,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:19:15,654 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:19:15,658 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,659 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:19:15,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:19:15,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,667 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,669 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:19:15,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:19:15,670 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 04:19:15,676 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 04:19:15,679 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:19:15,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,746 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,749 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:15,756 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,785 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 421 [2021-11-03 04:19:15,809 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 472 [2021-11-03 04:19:15,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,914 INFO L180 QuantifierPusher]: treesize reduction 30, result has 69.7 percent of original size [2021-11-03 04:19:15,928 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:15,929 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-03 04:19:15,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-03 04:19:15,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:15,967 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-03 04:19:15,970 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:15,971 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:15,975 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-03 04:19:15,987 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:19:15,997 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:19:16,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:19:16,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:19:16,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2021-11-03 04:19:16,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525831375] [2021-11-03 04:19:16,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 04:19:16,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:19:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 04:19:16,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-11-03 04:19:16,276 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 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) [2021-11-03 04:19:16,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:16,344 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-03 04:19:16,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:19:16,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 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 8 [2021-11-03 04:19:16,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:16,345 INFO L225 Difference]: With dead ends: 18 [2021-11-03 04:19:16,345 INFO L226 Difference]: Without dead ends: 15 [2021-11-03 04:19:16,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-11-03 04:19:16,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-03 04:19:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-03 04:19:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-03 04:19:16,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-03 04:19:16,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:16,350 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-03 04:19:16,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 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) [2021-11-03 04:19:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-03 04:19:16,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 04:19:16,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:16,351 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-03 04:19:16,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:16,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-03 04:19:16,576 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:19:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:16,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1492112282, now seen corresponding path program 3 times [2021-11-03 04:19:16,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:19:16,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067656743] [2021-11-03 04:19:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:16,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:19:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:16,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:19:16,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067656743] [2021-11-03 04:19:16,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067656743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:19:16,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363736570] [2021-11-03 04:19:16,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:19:16,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:19:16,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:19:16,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:19:16,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 04:19:16,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:19:16,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:19:16,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 04:19:16,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:17,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:17,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363736570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:19:17,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886853983] [2021-11-03 04:19:17,850 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:19:17,850 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:19:17,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:19:17,851 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:19:17,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:19:17,858 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:17,859 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:17,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:17,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:19:17,861 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:17,861 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:17,862 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:19:17,863 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 04:19:17,877 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-03 04:19:17,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:17,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:17,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:17,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:19:17,888 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:17,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:19:17,889 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:17,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:19:17,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:19:17,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:17,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:17,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:17,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:17,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:17,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:17,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:17,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:19:17,913 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:17,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:19:17,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:17,923 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:19:17,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:19:17,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:17,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:17,929 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:17,930 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:19:17,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:19:17,931 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 04:19:17,935 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 04:19:17,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:19:17,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:17,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:17,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:17,990 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:17,992 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:17,994 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:18,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 426 [2021-11-03 04:19:18,042 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 468 [2021-11-03 04:19:18,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,125 INFO L180 QuantifierPusher]: treesize reduction 30, result has 69.7 percent of original size [2021-11-03 04:19:18,126 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:18,127 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:18,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-03 04:19:18,138 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-03 04:19:18,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:18,169 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-03 04:19:18,170 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:18,171 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:18,174 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-03 04:19:18,178 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:19:18,185 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:19:18,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:19:18,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:19:18,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2021-11-03 04:19:18,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462708542] [2021-11-03 04:19:18,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-03 04:19:18,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:19:18,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-03 04:19:18,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=943, Unknown=0, NotChecked=0, Total=1482 [2021-11-03 04:19:18,466 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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) [2021-11-03 04:19:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:18,571 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-03 04:19:18,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 04:19:18,571 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 04:19:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:18,572 INFO L225 Difference]: With dead ends: 30 [2021-11-03 04:19:18,572 INFO L226 Difference]: Without dead ends: 27 [2021-11-03 04:19:18,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=589, Invalid=1051, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 04:19:18,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-03 04:19:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-03 04:19:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 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) [2021-11-03 04:19:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-03 04:19:18,581 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-03 04:19:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:18,582 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-03 04:19:18,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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) [2021-11-03 04:19:18,583 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-03 04:19:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-03 04:19:18,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:18,584 INFO L513 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-03 04:19:18,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:18,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-03 04:19:18,800 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:19:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:18,801 INFO L85 PathProgramCache]: Analyzing trace with hash 545896998, now seen corresponding path program 4 times [2021-11-03 04:19:18,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:19:18,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182404282] [2021-11-03 04:19:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:18,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:19:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:19,400 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:19:19,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182404282] [2021-11-03 04:19:19,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182404282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:19:19,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949927715] [2021-11-03 04:19:19,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 04:19:19,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:19:19,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:19:19,403 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:19:19,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 04:19:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:19,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 04:19:19,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:20,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:22,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949927715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:19:22,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821208949] [2021-11-03 04:19:22,085 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:19:22,085 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:19:22,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:19:22,086 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:19:22,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:19:22,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,106 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:22,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:19:22,107 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:22,108 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:19:22,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 04:19:22,112 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-03 04:19:22,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:22,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:22,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:22,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:19:22,124 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,124 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:19:22,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,127 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:19:22,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:19:22,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:22,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:22,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:22,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:22,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:22,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:19:22,155 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,157 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:19:22,157 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:19:22,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:19:22,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:19:22,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:19:22,164 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 04:19:22,167 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 04:19:22,169 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:19:22,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,215 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,217 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:22,219 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,236 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 421 [2021-11-03 04:19:22,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 472 [2021-11-03 04:19:22,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,359 INFO L180 QuantifierPusher]: treesize reduction 30, result has 69.7 percent of original size [2021-11-03 04:19:22,360 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:22,361 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,364 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-03 04:19:22,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-03 04:19:22,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:22,391 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-03 04:19:22,393 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:22,394 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:22,396 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-03 04:19:22,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:19:22,405 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:19:22,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:19:22,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:19:22,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 71 [2021-11-03 04:19:22,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377056924] [2021-11-03 04:19:22,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-03 04:19:22,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:19:22,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-03 04:19:22,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2219, Invalid=3331, Unknown=0, NotChecked=0, Total=5550 [2021-11-03 04:19:22,712 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 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) [2021-11-03 04:19:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:22,908 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-03 04:19:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-03 04:19:22,911 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 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 [2021-11-03 04:19:22,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:22,914 INFO L225 Difference]: With dead ends: 54 [2021-11-03 04:19:22,914 INFO L226 Difference]: Without dead ends: 51 [2021-11-03 04:19:22,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2317, Invalid=3535, Unknown=0, NotChecked=0, Total=5852 [2021-11-03 04:19:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-03 04:19:22,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-03 04:19:22,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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) [2021-11-03 04:19:22,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-03 04:19:22,934 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2021-11-03 04:19:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:22,934 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-03 04:19:22,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 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) [2021-11-03 04:19:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-03 04:19:22,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 04:19:22,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:22,938 INFO L513 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2021-11-03 04:19:22,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:23,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:19:23,160 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:19:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:23,161 INFO L85 PathProgramCache]: Analyzing trace with hash -696715866, now seen corresponding path program 5 times [2021-11-03 04:19:23,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:19:23,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779446010] [2021-11-03 04:19:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:23,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:19:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:24,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:19:24,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779446010] [2021-11-03 04:19:24,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779446010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:19:24,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508210342] [2021-11-03 04:19:24,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:19:24,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:19:24,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:19:24,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:19:24,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 04:19:24,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-03 04:19:24,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:19:24,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-03 04:19:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:27,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:32,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508210342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:19:32,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [402465076] [2021-11-03 04:19:32,565 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:19:32,565 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:19:32,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:19:32,565 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:19:32,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:19:32,579 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,580 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:32,581 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,581 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:19:32,582 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:32,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:19:32,584 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 04:19:32,586 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-03 04:19:32,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:32,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:32,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:32,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:19:32,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:19:32,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:19:32,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:19:32,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:32,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:32,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:32,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:32,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:32,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:32,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:32,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:32,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:32,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:19:32,619 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:19:32,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:19:32,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:19:32,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:19:32,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:19:32,629 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 04:19:32,632 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 04:19:32,634 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:19:32,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,671 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,673 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:32,675 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,684 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 201 [2021-11-03 04:19:32,691 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 04:19:32,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,731 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-03 04:19:32,734 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:19:32,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:19:32,752 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-03 04:19:32,753 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:19:32,754 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:19:32,756 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-03 04:19:32,759 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:19:32,766 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:19:33,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:19:33,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:19:33,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 143 [2021-11-03 04:19:33,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116680126] [2021-11-03 04:19:33,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-11-03 04:19:33,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:19:33,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-11-03 04:19:33,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9035, Invalid=12427, Unknown=0, NotChecked=0, Total=21462 [2021-11-03 04:19:33,267 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 144 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 143 states have internal predecessors, (147), 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) [2021-11-03 04:19:33,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:33,705 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2021-11-03 04:19:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-03 04:19:33,706 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 143 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-03 04:19:33,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:33,714 INFO L225 Difference]: With dead ends: 102 [2021-11-03 04:19:33,714 INFO L226 Difference]: Without dead ends: 99 [2021-11-03 04:19:33,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=9229, Invalid=12823, Unknown=0, NotChecked=0, Total=22052 [2021-11-03 04:19:33,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-03 04:19:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-03 04:19:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 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) [2021-11-03 04:19:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-11-03 04:19:33,738 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2021-11-03 04:19:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:33,739 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-11-03 04:19:33,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 143 states have internal predecessors, (147), 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) [2021-11-03 04:19:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-11-03 04:19:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 04:19:33,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:33,743 INFO L513 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2021-11-03 04:19:33,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:33,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-11-03 04:19:33,948 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:19:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:33,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1601704794, now seen corresponding path program 6 times [2021-11-03 04:19:33,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:19:33,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693122544] [2021-11-03 04:19:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:33,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:19:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:38,384 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:19:38,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693122544] [2021-11-03 04:19:38,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693122544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:19:38,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849201534] [2021-11-03 04:19:38,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:19:38,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:19:38,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:19:38,385 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:19:38,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 04:19:38,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:19:38,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:19:38,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-03 04:19:38,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:19:46,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:20:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:04,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849201534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:20:04,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2058367057] [2021-11-03 04:20:04,167 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:20:04,168 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:20:04,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:20:04,168 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:20:04,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:20:04,173 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,173 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:20:04,174 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,175 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:20:04,176 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:20:04,176 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:20:04,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 04:20:04,180 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-03 04:20:04,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:04,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:04,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:04,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:20:04,197 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:20:04,198 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:20:04,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:20:04,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:04,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:04,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:04,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:04,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:04,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:04,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:04,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:04,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:04,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:20:04,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:20:04,234 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,239 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:20:04,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:20:04,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:20:04,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:20:04,245 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 04:20:04,248 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 04:20:04,250 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:20:04,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,291 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,293 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:20:04,295 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,309 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 421 [2021-11-03 04:20:04,326 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 472 [2021-11-03 04:20:04,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,399 INFO L180 QuantifierPusher]: treesize reduction 30, result has 69.7 percent of original size [2021-11-03 04:20:04,400 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:20:04,401 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-03 04:20:04,406 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-11-03 04:20:04,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:20:04,429 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-03 04:20:04,430 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:20:04,431 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:20:04,433 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-03 04:20:04,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:20:04,441 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:20:04,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:20:04,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:20:04,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 287 [2021-11-03 04:20:04,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751121992] [2021-11-03 04:20:04,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 288 states [2021-11-03 04:20:04,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:20:05,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 288 interpolants. [2021-11-03 04:20:05,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36491, Invalid=47899, Unknown=0, NotChecked=0, Total=84390 [2021-11-03 04:20:05,024 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 288 states, 288 states have (on average 1.0104166666666667) internal successors, (291), 287 states have internal predecessors, (291), 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) [2021-11-03 04:20:06,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:06,180 INFO L93 Difference]: Finished difference Result 198 states and 293 transitions. [2021-11-03 04:20:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-03 04:20:06,181 INFO L78 Accepts]: Start accepts. Automaton has has 288 states, 288 states have (on average 1.0104166666666667) internal successors, (291), 287 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-03 04:20:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:06,185 INFO L225 Difference]: With dead ends: 198 [2021-11-03 04:20:06,185 INFO L226 Difference]: Without dead ends: 195 [2021-11-03 04:20:06,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5602 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=36877, Invalid=48679, Unknown=0, NotChecked=0, Total=85556 [2021-11-03 04:20:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-03 04:20:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-03 04:20:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 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) [2021-11-03 04:20:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-11-03 04:20:06,211 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2021-11-03 04:20:06,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:06,211 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-11-03 04:20:06,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 288 states, 288 states have (on average 1.0104166666666667) internal successors, (291), 287 states have internal predecessors, (291), 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) [2021-11-03 04:20:06,212 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-11-03 04:20:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-03 04:20:06,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:06,216 INFO L513 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1] [2021-11-03 04:20:06,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:20:06,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-03 04:20:06,432 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:20:06,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:06,433 INFO L85 PathProgramCache]: Analyzing trace with hash -9971034, now seen corresponding path program 7 times [2021-11-03 04:20:06,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:20:06,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602581055] [2021-11-03 04:20:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:06,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:20:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:22,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:20:22,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602581055] [2021-11-03 04:20:22,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602581055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:20:22,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909115478] [2021-11-03 04:20:22,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 04:20:22,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:20:22,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:20:22,139 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:20:22,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 04:20:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:22,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-03 04:20:22,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:20:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:20:54,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:02,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909115478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:02,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [112585008] [2021-11-03 04:22:02,005 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:22:02,005 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:22:02,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:22:02,006 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:22:02,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:22:02,009 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,010 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:22:02,011 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:22:02,012 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:22:02,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,013 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:22:02,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 04:22:02,015 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-11-03 04:22:02,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:02,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:02,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:02,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:22:02,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:22:02,024 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,025 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:22:02,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:22:02,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:02,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:02,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:02,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:02,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:22:02,049 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:22:02,051 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,051 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:22:02,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:22:02,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,055 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:22:02,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:22:02,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 04:22:02,060 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 04:22:02,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:22:02,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,094 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,095 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:22:02,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 241 [2021-11-03 04:22:02,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 04:22:02,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,201 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-03 04:22:02,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:22:02,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:22:02,227 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-03 04:22:02,228 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:22:02,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:22:02,232 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-03 04:22:02,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:22:02,244 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:22:03,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:22:03,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:22:03,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 192, 192] total 575 [2021-11-03 04:22:03,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806378072] [2021-11-03 04:22:03,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 576 states [2021-11-03 04:22:03,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:22:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 576 interpolants. [2021-11-03 04:22:03,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146699, Invalid=187963, Unknown=0, NotChecked=0, Total=334662 [2021-11-03 04:22:03,415 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 576 states, 576 states have (on average 1.0052083333333333) internal successors, (579), 575 states have internal predecessors, (579), 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) [2021-11-03 04:22:07,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:07,376 INFO L93 Difference]: Finished difference Result 390 states and 581 transitions. [2021-11-03 04:22:07,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-03 04:22:07,378 INFO L78 Accepts]: Start accepts. Automaton has has 576 states, 576 states have (on average 1.0052083333333333) internal successors, (579), 575 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-11-03 04:22:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:07,381 INFO L225 Difference]: With dead ends: 390 [2021-11-03 04:22:07,381 INFO L226 Difference]: Without dead ends: 387 [2021-11-03 04:22:07,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 579 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20434 ImplicationChecksByTransitivity, 109.4s TimeCoverageRelationStatistics Valid=147469, Invalid=189511, Unknown=0, NotChecked=0, Total=336980 [2021-11-03 04:22:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-03 04:22:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-11-03 04:22:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 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) [2021-11-03 04:22:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2021-11-03 04:22:07,434 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2021-11-03 04:22:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:07,435 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2021-11-03 04:22:07,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 576 states, 576 states have (on average 1.0052083333333333) internal successors, (579), 575 states have internal predecessors, (579), 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) [2021-11-03 04:22:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2021-11-03 04:22:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-03 04:22:07,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:07,448 INFO L513 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1] [2021-11-03 04:22:07,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:07,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-11-03 04:22:07,668 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:22:07,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:07,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2016392870, now seen corresponding path program 8 times [2021-11-03 04:22:07,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:22:07,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506810164] [2021-11-03 04:22:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:07,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:22:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:08,016 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:23:08,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506810164] [2021-11-03 04:23:08,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506810164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:23:08,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20680726] [2021-11-03 04:23:08,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:23:08,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:23:08,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:23:08,033 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:23:08,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-03 04:23:15,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2021-11-03 04:23:15,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:23:15,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-03 04:23:15,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:25:29,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:10,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20680726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:10,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [212531628] [2021-11-03 04:30:10,767 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 04:30:10,767 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:30:10,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:30:10,768 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:30:10,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:30:10,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,778 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:30:10,778 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:30:10,779 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:30:10,779 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:30:10,780 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 04:30:10,783 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 21=[|v_#valid_17|]} [2021-11-03 04:30:10,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:10,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:10,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:10,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:30:10,793 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,793 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:30:10,794 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,794 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:30:10,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:30:10,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:10,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:10,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:10,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:10,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:10,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:10,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:10,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:10,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:30:10,814 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,816 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:30:10,817 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,817 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:30:10,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:30:10,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:30:10,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:30:10,822 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 04:30:10,823 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 04:30:10,825 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 04:30:10,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,871 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,872 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:30:10,874 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 241 [2021-11-03 04:30:10,893 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 04:30:10,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,929 INFO L180 QuantifierPusher]: treesize reduction 36, result has 64.7 percent of original size [2021-11-03 04:30:10,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:30:10,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:30:10,948 INFO L180 QuantifierPusher]: treesize reduction 30, result has 68.8 percent of original size [2021-11-03 04:30:10,949 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:30:10,950 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:10,952 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-03 04:30:10,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:30:10,960 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:30:12,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:30:12,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:30:12,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 384, 384] total 1151 [2021-11-03 04:30:12,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830735433] [2021-11-03 04:30:12,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 1152 states [2021-11-03 04:30:12,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:30:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1152 interpolants. [2021-11-03 04:30:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588299, Invalid=744571, Unknown=0, NotChecked=0, Total=1332870 [2021-11-03 04:30:13,108 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 1152 states, 1152 states have (on average 1.0026041666666667) internal successors, (1155), 1151 states have internal predecessors, (1155), 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) [2021-11-03 04:30:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:42,716 INFO L93 Difference]: Finished difference Result 774 states and 1157 transitions. [2021-11-03 04:30:42,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-11-03 04:30:42,719 INFO L78 Accepts]: Start accepts. Automaton has has 1152 states, 1152 states have (on average 1.0026041666666667) internal successors, (1155), 1151 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2021-11-03 04:30:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:42,725 INFO L225 Difference]: With dead ends: 774 [2021-11-03 04:30:42,725 INFO L226 Difference]: Without dead ends: 771 [2021-11-03 04:30:42,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1543 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 1155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77746 ImplicationChecksByTransitivity, 462.6s TimeCoverageRelationStatistics Valid=589837, Invalid=747655, Unknown=0, NotChecked=0, Total=1337492 [2021-11-03 04:30:42,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-11-03 04:30:42,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2021-11-03 04:30:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0012987012987014) internal successors, (771), 770 states have internal predecessors, (771), 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) [2021-11-03 04:30:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2021-11-03 04:30:42,876 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2021-11-03 04:30:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:42,877 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2021-11-03 04:30:42,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 1152 states, 1152 states have (on average 1.0026041666666667) internal successors, (1155), 1151 states have internal predecessors, (1155), 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) [2021-11-03 04:30:42,880 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2021-11-03 04:30:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2021-11-03 04:30:42,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:42,917 INFO L513 BasicCegarLoop]: trace histogram [766, 1, 1, 1, 1] [2021-11-03 04:30:42,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:43,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95de70f3-8182-4633-b897-0eaa64874c4b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:30:43,132 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:30:43,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:43,133 INFO L85 PathProgramCache]: Analyzing trace with hash -706777434, now seen corresponding path program 9 times [2021-11-03 04:30:43,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:30:43,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191335627] [2021-11-03 04:30:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:43,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:30:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat